diff --git a/dsp/tty/describe.c b/dsp/tty/describe.c
index 06a2944fe..3ffe2f10c 100644
--- a/dsp/tty/describe.c
+++ b/dsp/tty/describe.c
@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "dsp/tty/tty.h"
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
diff --git a/examples/dlopen.c b/examples/dlopen.c
index 0808d8128..3b7543d5a 100644
--- a/examples/dlopen.c
+++ b/examples/dlopen.c
@@ -10,7 +10,6 @@
 #include "libc/calls/calls.h"
 #include "libc/dlopen/dlfcn.h"
 #include "libc/fmt/itoa.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/nt/thunk/msabi.h"
 #include "libc/runtime/runtime.h"
 
@@ -24,6 +23,7 @@
  * - x86-64 FreeBSD
  * - x86-64 Windows
  * - aarch64 Linux w/ Glibc
+ * - aarch64 Linux w/ Musl Libc
  * - aarch64 MacOS
  *
  */
diff --git a/examples/hiredis.c b/examples/hiredis.c
index 5f4954bb0..749cc61db 100644
--- a/examples/hiredis.c
+++ b/examples/hiredis.c
@@ -9,7 +9,6 @@
 #endif
 #include "libc/runtime/runtime.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "third_party/hiredis/hiredis.h"
diff --git a/examples/kilo.c b/examples/kilo.c
index 0aca8475b..5a4eb37fe 100644
--- a/examples/kilo.c
+++ b/examples/kilo.c
@@ -62,7 +62,6 @@ Contact: antirez@gmail.com\"\n\
 #include "libc/calls/termios.h"
 #include "libc/calls/weirdtypes.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/mem/alg.h"
 #include "libc/mem/arraylist2.internal.h"
diff --git a/examples/nesemu1.cc b/examples/nesemu1.cc
index ea9a987a1..e521c5739 100644
--- a/examples/nesemu1.cc
+++ b/examples/nesemu1.cc
@@ -19,7 +19,6 @@
 #include "libc/dce.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/bits.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/inttypes.h"
diff --git a/examples/picol.c b/examples/picol.c
index 11e0b4460..fe32ba9fd 100644
--- a/examples/picol.c
+++ b/examples/picol.c
@@ -33,7 +33,6 @@
  */
 
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
diff --git a/examples/portscan.c b/examples/portscan.c
index 11f330a3e..091cd79fa 100644
--- a/examples/portscan.c
+++ b/examples/portscan.c
@@ -12,7 +12,6 @@
 #include "libc/calls/struct/timeval.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/magnumstrs.internal.h"
 #include "libc/mem/alloca.h"
 #include "libc/runtime/runtime.h"
diff --git a/examples/stat.c b/examples/stat.c
index 080e2d3be..987020ca0 100644
--- a/examples/stat.c
+++ b/examples/stat.c
@@ -11,7 +11,6 @@
 #include "libc/calls/calls.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/check.h"
 #include "libc/log/log.h"
 #include "libc/mem/gc.h"
diff --git a/examples/stringbuffer.c b/examples/stringbuffer.c
index 282fcab01..4f965be2f 100644
--- a/examples/stringbuffer.c
+++ b/examples/stringbuffer.c
@@ -8,7 +8,6 @@
 ╚─────────────────────────────────────────────────────────────────*/
 #endif
 #include "libc/calls/calls.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/check.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/append.h"
diff --git a/examples/ttyinfo.c b/examples/ttyinfo.c
index 98b30f978..2febd7a1f 100644
--- a/examples/ttyinfo.c
+++ b/examples/ttyinfo.c
@@ -15,7 +15,6 @@
 #include "libc/calls/struct/sigset.h"
 #include "libc/calls/termios.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/check.h"
 #include "libc/log/log.h"
 #include "libc/runtime/runtime.h"
diff --git a/examples/unbourne.c b/examples/unbourne.c
index a643f3c68..0707ca478 100644
--- a/examples/unbourne.c
+++ b/examples/unbourne.c
@@ -122,7 +122,6 @@
 #include "libc/dce.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/limits.h"
 #include "libc/log/log.h"
diff --git a/examples/wall.c b/examples/wall.c
index f4da6315b..6b6eeddc2 100644
--- a/examples/wall.c
+++ b/examples/wall.c
@@ -11,7 +11,6 @@
 #include "libc/calls/struct/timespec.h"
 #include "libc/calls/termios.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/append.h"
 #include "libc/stdio/stdio.h"
diff --git a/libc/calls/ntaccesscheck.c b/libc/calls/ntaccesscheck.c
index 895d4a357..dc1d5109f 100644
--- a/libc/calls/ntaccesscheck.c
+++ b/libc/calls/ntaccesscheck.c
@@ -24,7 +24,6 @@
 #include "libc/calls/syscall_support-nt.internal.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/intrin/weaken.h"
 #include "libc/mem/mem.h"
diff --git a/libc/calls/ttyname_r.c b/libc/calls/ttyname_r.c
index be049136c..0f505264c 100644
--- a/libc/calls/ttyname_r.c
+++ b/libc/calls/ttyname_r.c
@@ -24,7 +24,6 @@
 #include "libc/calls/syscall-sysv.internal.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/fmt/magnumstrs.internal.h"
 #include "libc/intrin/strace.internal.h"
diff --git a/libc/dlopen/dlopen.c b/libc/dlopen/dlopen.c
index 6f0ff4c31..0636ac23d 100644
--- a/libc/dlopen/dlopen.c
+++ b/libc/dlopen/dlopen.c
@@ -16,6 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/assert.h"
 #include "libc/atomic.h"
 #include "libc/calls/calls.h"
 #include "libc/calls/struct/sigset.internal.h"
@@ -34,8 +35,8 @@
 #include "libc/elf/struct/phdr.h"
 #include "libc/errno.h"
 #include "libc/fmt/itoa.h"
+#include "libc/intrin/atomic.h"
 #include "libc/intrin/bits.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/strace.internal.h"
 #include "libc/limits.h"
 #include "libc/nt/dll.h"
@@ -69,11 +70,6 @@
  * @kudos jacereda for figuring out how to do this
  */
 
-#define XNU_RTLD_LAZY   1
-#define XNU_RTLD_NOW    2
-#define XNU_RTLD_LOCAL  4
-#define XNU_RTLD_GLOBAL 8
-
 #define AMD_REXB    0x41
 #define AMD_REXW    0x48
 #define AMD_MOV_IMM 0xb8
@@ -83,11 +79,16 @@
 #define ARM_IDX_OFF 21
 #define ARM_MOV_NEX 0xf2800000u
 
+#define XNU_RTLD_LAZY   1
+#define XNU_RTLD_NOW    2
+#define XNU_RTLD_LOCAL  4
+#define XNU_RTLD_GLOBAL 8
+
 #define HELPER \
   "#include <dlfcn.h>\n\
 #include <stdio.h>\n\
 #include <stdlib.h>\n\
-int main(int argc, char *argv[]) {\n\
+int main(int argc, char **argv, char **envp) {\n\
   char *ep;\n\
   long addr;\n\
   if (argc != 2) {\n\
@@ -201,7 +202,7 @@ static char *elf_map(int fd, Elf64_Ehdr *ehdr, Elf64_Phdr *phdr, long pagesz,
                      char *interp_path, size_t interp_size) {
   Elf64_Addr maxva = 0;
   Elf64_Addr minva = -1;
-  for (Elf64_Phdr *p = phdr; p < &phdr[ehdr->e_phnum]; p++) {
+  for (Elf64_Phdr *p = phdr; p < phdr + ehdr->e_phnum; p++) {
     if (p->p_type != PT_LOAD) {
       continue;
     }
@@ -227,18 +228,31 @@ static char *elf_map(int fd, Elf64_Ehdr *ehdr, Elf64_Phdr *phdr, long pagesz,
       }
       continue;
     }
-    int prot = elf2prot(p->p_flags);
     Elf64_Addr skew = p->p_vaddr & (pagesz - 1);
     Elf64_Off off = p->p_offset - skew;
-    if (__sys_mmap(base + p->p_vaddr - skew, skew + p->p_filesz, prot,
+    Elf64_Addr a = p->p_vaddr + p->p_filesz;
+    Elf64_Addr b = (a + (pagesz - 1)) & -pagesz;
+    Elf64_Addr c = p->p_vaddr + p->p_memsz;
+    int prot2 = elf2prot(p->p_flags);
+    int prot1 = prot2;
+    if (b > a) {
+      prot1 |= PROT_WRITE;
+      prot1 &= ~PROT_EXEC;
+    }
+    if (__sys_mmap(base + p->p_vaddr - skew, skew + p->p_filesz, prot1,
                    MAP_FIXED | MAP_PRIVATE, fd, off, off) == MAP_FAILED) {
       return MAP_FAILED;
     }
-    Elf64_Addr fend = (p->p_vaddr + p->p_filesz + (pagesz - 1)) & -pagesz;
-    Elf64_Addr mend = p->p_vaddr + p->p_memsz;
-    if (mend > fend && __sys_mmap(base + fend, mend - fend, prot,
-                                  MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1,
-                                  0, 0) == MAP_FAILED) {
+    if (b > a) {
+      bzero(base + a, b - a);
+    }
+    if (c > b && __sys_mmap(base + b, c - b, prot2,
+                            MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0,
+                            0) == MAP_FAILED) {
+      return MAP_FAILED;
+    }
+    if (prot1 != prot2 &&
+        sys_mprotect(base + p->p_vaddr - skew, skew + p->p_filesz, prot2)) {
       return MAP_FAILED;
     }
   }
@@ -302,14 +316,14 @@ static dontinline void elf_exec(const char *file, char **envp) {
   // get microprocessor page size
   long pagesz = getauxval(AT_PAGESZ);
 
-  // load executable
+  // load helper executable into address space
   struct Loaded prog;
   char interp_path[256] = {0};
   if (!elf_load(&prog, file, pagesz, interp_path, sizeof(interp_path))) {
     return;
   }
 
-  // load platform libc
+  // load platform c library into address space
   struct Loaded interp;
   if (!elf_load(&interp, interp_path, pagesz, 0, 0)) {
     return;
@@ -343,6 +357,7 @@ static dontinline void elf_exec(const char *file, char **envp) {
   FormatInt64(address_argument, (uintptr_t)foreign_helper);
 
   // push auxiliary values
+  // these tell the platform libc how to load the executable
   *--sp = 0;
   unsigned long key, val;
   for (av = (Elf64_auxv_t *)__auxv; (key = av->a_type); ++av) {
@@ -508,7 +523,8 @@ static void *foreign_thunk_sysv(void *func) {
   if (!(p = code = foreign_alloc(36))) return 0;  // 16 + 16 + 4 = 36
   p = movimm(p, 5, (uintptr_t)func);
   p = movimm(p, 10, (uintptr_t)foreign_tramp);
-  *(uint32_t *)p = 0xd63f0140;  // blr x10
+  *(uint32_t *)p = 0xd61f0140;  // br x10
+  __clear_cache(code, p + 4);
 #else
 #error "unsupported architecture"
 #endif
diff --git a/libc/dlopen/dlopen.mk b/libc/dlopen/dlopen.mk
index c69421946..cdd4998f7 100644
--- a/libc/dlopen/dlopen.mk
+++ b/libc/dlopen/dlopen.mk
@@ -34,6 +34,7 @@ LIBC_DLOPEN_A_DIRECTDEPS =						\
 	LIBC_SYSV							\
 	LIBC_SYSV_CALLS							\
 	LIBC_STR							\
+	THIRD_PARTY_COMPILER_RT
 
 LIBC_DLOPEN_A_DEPS :=							\
 	$(call uniq,$(foreach x,$(LIBC_DLOPEN_A_DIRECTDEPS),$($(x))))
diff --git a/libc/dns/gethoststxt.c b/libc/dns/gethoststxt.c
index ace4947db..d61d650ae 100644
--- a/libc/dns/gethoststxt.c
+++ b/libc/dns/gethoststxt.c
@@ -21,7 +21,6 @@
 #include "libc/dce.h"
 #include "libc/dns/hoststxt.h"
 #include "libc/dns/servicestxt.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/bits.h"
 #include "libc/intrin/pushpop.internal.h"
 #include "libc/intrin/safemacros.internal.h"
diff --git a/libc/dns/getnameinfo.c b/libc/dns/getnameinfo.c
index a610eeea4..483226d75 100644
--- a/libc/dns/getnameinfo.c
+++ b/libc/dns/getnameinfo.c
@@ -31,7 +31,6 @@
 #include "libc/dns/resolvconf.h"
 #include "libc/dns/servicestxt.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/mem/mem.h"
diff --git a/libc/dns/getresolvconf.c b/libc/dns/getresolvconf.c
index b46d31e52..b985c839e 100644
--- a/libc/dns/getresolvconf.c
+++ b/libc/dns/getresolvconf.c
@@ -19,7 +19,6 @@
 #include "libc/cxxabi.h"
 #include "libc/dce.h"
 #include "libc/dns/resolvconf.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/pushpop.internal.h"
 #include "libc/macros.internal.h"
 #include "libc/mem/mem.h"
diff --git a/libc/dns/resolvehostsreverse.c b/libc/dns/resolvehostsreverse.c
index 7e8a803a6..cdd76cf02 100644
--- a/libc/dns/resolvehostsreverse.c
+++ b/libc/dns/resolvehostsreverse.c
@@ -19,7 +19,6 @@
 #include "libc/dns/consts.h"
 #include "libc/dns/dns.h"
 #include "libc/dns/hoststxt.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/bits.h"
 #include "libc/mem/alg.h"
 #include "libc/sock/sock.h"
diff --git a/libc/fmt/__xpg_strerror_r.c b/libc/fmt/__xpg_strerror_r.c
index 80153c5ca..d313e97d9 100644
--- a/libc/fmt/__xpg_strerror_r.c
+++ b/libc/fmt/__xpg_strerror_r.c
@@ -16,9 +16,9 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 
-int __xpg_strerror_r(int a, char *b, size_t c) {
-  return strerror_r(a, b, c);
+char *__xpg_strerror_r(int a, char *b, size_t c) {
+  strerror_r(a, b, c);
+  return b;
 }
diff --git a/libc/fmt/atoi.c b/libc/fmt/atoi.c
index 89747d6ca..245925981 100644
--- a/libc/fmt/atoi.c
+++ b/libc/fmt/atoi.c
@@ -41,9 +41,8 @@
  */
 int atoi(const char *s) {
   int x, c, d;
-  do {
-    c = *s++;
-  } while (c == ' ' || c == '\t');
+  do c = *s++;
+  while (c == ' ' || c == '\t');
   d = c == '-' ? -1 : 1;
   if (c == '-' || c == '+') c = *s++;
   for (x = 0; isdigit(c); c = *s++) {
diff --git a/libc/fmt/atol.c b/libc/fmt/atol.c
index b45790dc7..c039e556d 100644
--- a/libc/fmt/atol.c
+++ b/libc/fmt/atol.c
@@ -31,9 +31,8 @@
 long atol(const char *s) {
   long x;
   int c, d;
-  do {
-    c = *s++;
-  } while (c == ' ' || c == '\t');
+  do c = *s++;
+  while (c == ' ' || c == '\t');
   d = c == '-' ? -1 : 1;
   if (c == '-' || c == '+') c = *s++;
   for (x = 0; isdigit(c); c = *s++) {
diff --git a/libc/fmt/conv.h b/libc/fmt/conv.h
index a2941b715..df240dd75 100644
--- a/libc/fmt/conv.h
+++ b/libc/fmt/conv.h
@@ -72,17 +72,6 @@ imaxdiv_t imaxdiv(intmax_t, intmax_t) pureconst;
 #define lldiv(num, den) ((lldiv_t){(num) / (den), (num) % (den)})
 #endif
 
-#if (__GNUC__ * 100 + __GNUC_MINOR__ >= 406 || defined(__llvm__)) && \
-    !defined(__STRICT_ANSI__) && defined(_COSMO_SOURCE) &&           \
-    !defined(__COSMOCC__)
-int128_t i128abs(int128_t)
-libcesque pureconst;
-int128_t strtoi128(const char *, char **, int) paramsnonnull((1));
-uint128_t strtou128(const char *, char **, int) paramsnonnull((1));
-int128_t wcstoi128(const wchar_t *, wchar_t **, int);
-uint128_t wcstou128(const wchar_t *, wchar_t **, int);
-#endif /* gcc 4.6+ */
-
 COSMOPOLITAN_C_END_
 #endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
 #endif /* COSMOPOLITAN_LIBC_FMT_CONV_H_ */
diff --git a/libc/fmt/divmod10.internal.h b/libc/fmt/divmod10.internal.h
index 3f3542991..46b09574b 100644
--- a/libc/fmt/divmod10.internal.h
+++ b/libc/fmt/divmod10.internal.h
@@ -8,7 +8,7 @@ forceinline uint64_t __divmod10(uint64_t __x, unsigned *__r) {
   *__r = __x % 10;
   return __x / 10;
 #else
-  uint128_t __dw;
+  unsigned __int128 __dw;
   unsigned long long __hi, __rm;
   __dw = __x;
   __dw *= 0xcccccccccccccccdull;
diff --git a/libc/fmt/fmt.h b/libc/fmt/fmt.h
deleted file mode 100644
index 704e5d27a..000000000
--- a/libc/fmt/fmt.h
+++ /dev/null
@@ -1,25 +0,0 @@
-#ifndef COSMOPOLITAN_LIBC_FMT_FMT_H_
-#define COSMOPOLITAN_LIBC_FMT_FMT_H_
-
-#if __SIZEOF_POINTER__ == 8
-#define POINTER_XDIGITS 12 /* math.log(2**48-1,16) */
-#else
-#define POINTER_XDIGITS 8
-#endif
-
-#if !(__ASSEMBLER__ + __LINKER__ + 0)
-COSMOPOLITAN_C_START_
-
-char *fcvt(double, int, int *, int *);
-char *ecvt(double, int, int *, int *);
-char *gcvt(double, int, char *);
-
-#ifdef _COSMO_SOURCE
-int __vcscanf(int (*)(void *), int (*)(int, void *), void *, const char *,
-              va_list);
-int __fmt(void *, void *, const char *, va_list);
-#endif
-
-COSMOPOLITAN_C_END_
-#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
-#endif /* COSMOPOLITAN_LIBC_FMT_FMT_H_ */
diff --git a/libc/fmt/fmt.mk b/libc/fmt/fmt.mk
index 77106ecb4..8570cd145 100644
--- a/libc/fmt/fmt.mk
+++ b/libc/fmt/fmt.mk
@@ -76,17 +76,6 @@ o/$(MODE)/libc/fmt/wcstoumax.o: private		\
 		CFLAGS +=			\
 			-Os
 
-# we can't use compiler magic because:
-#   kprintf() depends on these functions
-o/$(MODE)/libc/fmt/strerrno.greg.o		\
-o/$(MODE)/libc/fmt/strerrdoc.greg.o		\
-o/$(MODE)/libc/fmt/strerror_wr.greg.o: private	\
-		COPTS +=			\
-			-fpie			\
-			-fno-sanitize=all	\
-			-fno-stack-protector	\
-			-fpatchable-function-entry=0,0
-
 LIBC_FMT_LIBS = $(foreach x,$(LIBC_FMT_ARTIFACTS),$($(x)))
 LIBC_FMT_SRCS = $(foreach x,$(LIBC_FMT_ARTIFACTS),$($(x)_SRCS))
 LIBC_FMT_HDRS = $(foreach x,$(LIBC_FMT_ARTIFACTS),$($(x)_HDRS))
diff --git a/libc/fmt/strtol.internal.h b/libc/fmt/internal.h
similarity index 94%
rename from libc/fmt/strtol.internal.h
rename to libc/fmt/internal.h
index 129216ddd..7ea0ca33a 100644
--- a/libc/fmt/strtol.internal.h
+++ b/libc/fmt/internal.h
@@ -41,4 +41,8 @@
     }                                                                      \
   }
 
+int __vcscanf(int (*)(void *), int (*)(int, void *), void *, const char *,
+              va_list);
+int __fmt(void *, void *, const char *, va_list);
+
 #endif /* COSMOPOLITAN_LIBC_FMT_STRTOL_H_ */
diff --git a/libc/fmt/itoa64radix8.c b/libc/fmt/itoa64radix8.c
deleted file mode 100644
index ffd4e94c6..000000000
--- a/libc/fmt/itoa64radix8.c
+++ /dev/null
@@ -1,39 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/conv.h"
-#include "libc/fmt/itoa.h"
-#include "libc/limits.h"
-#include "libc/mem/reverse.internal.h"
-
-/**
- * Converts unsigned 64-bit integer to octal string.
- * @param a needs at least 24 bytes
- * @return bytes written w/o nul
- */
-dontinline size_t uint64toarray_radix8(uint64_t i, char a[hasatleast 24]) {
-  size_t j;
-  j = 0;
-  do {
-    a[j++] = i % 8 + '0';
-    i /= 8;
-  } while (i > 0);
-  a[j] = '\0';
-  reverse(a, j);
-  return j;
-}
diff --git a/libc/fmt/sizetol.c b/libc/fmt/sizetol.c
index 962457819..9257cfe41 100644
--- a/libc/fmt/sizetol.c
+++ b/libc/fmt/sizetol.c
@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdckdint.h"
 #include "libc/str/str.h"
 #include "libc/sysv/errfuns.h"
diff --git a/libc/fmt/stripext.c b/libc/fmt/stripext.c
index 4bfeabc0e..6fd8c9f73 100644
--- a/libc/fmt/stripext.c
+++ b/libc/fmt/stripext.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 
 /**
diff --git a/libc/fmt/stripexts.c b/libc/fmt/stripexts.c
index ed0163bd0..0848d56ba 100644
--- a/libc/fmt/stripexts.c
+++ b/libc/fmt/stripexts.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 
 /**
diff --git a/libc/fmt/strtol.c b/libc/fmt/strtol.c
index 3cd2c40d9..9a50b49be 100644
--- a/libc/fmt/strtol.c
+++ b/libc/fmt/strtol.c
@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/strtol.internal.h"
+#include "libc/fmt/internal.h"
 #include "libc/limits.h"
 #include "libc/stdckdint.h"
 #include "libc/str/str.h"
diff --git a/libc/fmt/strtoul.c b/libc/fmt/strtoul.c
index af0aaf26e..bf2cbf79e 100644
--- a/libc/fmt/strtoul.c
+++ b/libc/fmt/strtoul.c
@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/strtol.internal.h"
+#include "libc/fmt/internal.h"
 #include "libc/limits.h"
 #include "libc/stdckdint.h"
 #include "libc/str/str.h"
diff --git a/libc/fmt/wcstol.c b/libc/fmt/wcstol.c
index 7e2571c88..aac4baeab 100644
--- a/libc/fmt/wcstol.c
+++ b/libc/fmt/wcstol.c
@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/strtol.internal.h"
+#include "libc/fmt/internal.h"
 #include "libc/limits.h"
 #include "libc/stdckdint.h"
 #include "libc/str/str.h"
diff --git a/libc/fmt/wcstoul.c b/libc/fmt/wcstoul.c
index 6c3865ccb..723a7d041 100644
--- a/libc/fmt/wcstoul.c
+++ b/libc/fmt/wcstoul.c
@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/strtol.internal.h"
+#include "libc/fmt/internal.h"
 #include "libc/limits.h"
 #include "libc/stdckdint.h"
 #include "libc/str/str.h"
diff --git a/libc/fmt/itoa64.c b/libc/intrin/__clear_cache.c
similarity index 71%
rename from libc/fmt/itoa64.c
rename to libc/intrin/__clear_cache.c
index 1905b2520..b44e314eb 100644
--- a/libc/fmt/itoa64.c
+++ b/libc/intrin/__clear_cache.c
@@ -1,7 +1,7 @@
 /*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
 │vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
 ╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
+│ Copyright 2023 Justine Alexandra Roberts Tunney                              │
 │                                                                              │
 │ Permission to use, copy, modify, and/or distribute this software for         │
 │ any purpose with or without fee is hereby granted, provided that the         │
@@ -16,26 +16,22 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/conv.h"
-#include "libc/fmt/itoa.h"
-#include "libc/mem/reverse.internal.h"
 
-dontinline size_t uint64toarray(uint64_t i, char *a, int r) {
-  size_t j;
-  j = 0;
-  do {
-    a[j++] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"[i % r];
-    i /= r;
-  } while (i > 0);
-  a[j] = '\0';
-  reverse(a, j);
-  return j;
-}
-
-size_t int64toarray(int64_t i, char *a, int r) {
-  if (i < 0) {
-    *a++ = '-';
-    i = -(uint64_t)i;
+void __clear_cache2(const void *base, const void *end) {
+#ifdef __aarch64__
+  int icache, dcache;
+  const char *p, *pe = end;
+  static unsigned int ctr_el0 = 0;
+  if (!ctr_el0) asm volatile("mrs\t%0,ctr_el0" : "=r"(ctr_el0));
+  icache = 4 << (ctr_el0 & 15);
+  dcache = 4 << ((ctr_el0 >> 16) & 15);
+  for (p = (const char *)((uintptr_t)base & -dcache); p < pe; p += dcache) {
+    asm volatile("dc\tcvau,%0" : : "r"(p) : "memory");
   }
-  return uint64toarray(i, a, r);
+  asm volatile("dsb\tish" ::: "memory");
+  for (p = (const char *)((uintptr_t)base & -icache); p < pe; p += icache) {
+    asm volatile("ic\tivau,%0" : : "r"(p) : "memory");
+  }
+  asm volatile("dsb\tish\nisb" ::: "memory");
+#endif
 }
diff --git a/libc/intrin/formatint32.c b/libc/intrin/formatint32.c
index 0e13f13e1..9afc72f50 100644
--- a/libc/intrin/formatint32.c
+++ b/libc/intrin/formatint32.c
@@ -24,7 +24,7 @@
  * @param p needs at least 12 bytes
  * @return pointer to nul byte
  */
-privileged dontinline char *FormatUint32(char p[hasatleast 12], uint32_t x) {
+dontinline char *FormatUint32(char p[hasatleast 12], uint32_t x) {
   char t;
   size_t i, a, b;
   i = 0;
@@ -49,7 +49,7 @@ privileged dontinline char *FormatUint32(char p[hasatleast 12], uint32_t x) {
  * @param p needs at least 12 bytes
  * @return pointer to nul byte
  */
-privileged char *FormatInt32(char p[hasatleast 12], int32_t x) {
+char *FormatInt32(char p[hasatleast 12], int32_t x) {
   if (x < 0) *p++ = '-', x = -(uint32_t)x;
   return FormatUint32(p, x);
 }
diff --git a/libc/intrin/kprintf.greg.c b/libc/intrin/kprintf.greg.c
index 3b583bfcd..317318949 100644
--- a/libc/intrin/kprintf.greg.c
+++ b/libc/intrin/kprintf.greg.c
@@ -18,32 +18,18 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/intrin/kprintf.h"
 #include "ape/sections.internal.h"
-#include "libc/calls/calls.h"
-#include "libc/calls/state.internal.h"
-#include "libc/calls/syscall-sysv.internal.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
 #include "libc/fmt/divmod10.internal.h"
-#include "libc/fmt/fmt.h"
-#include "libc/fmt/itoa.h"
 #include "libc/fmt/magnumstrs.internal.h"
-#include "libc/intrin/asan.internal.h"
-#include "libc/intrin/asancodes.h"
 #include "libc/intrin/asmflag.h"
 #include "libc/intrin/atomic.h"
 #include "libc/intrin/bits.h"
-#include "libc/intrin/cmpxchg.h"
 #include "libc/intrin/getenv.internal.h"
-#include "libc/intrin/kprintf.h"
 #include "libc/intrin/likely.h"
 #include "libc/intrin/nomultics.internal.h"
-#include "libc/intrin/safemacros.internal.h"
-#include "libc/intrin/strace.internal.h"
 #include "libc/intrin/weaken.h"
-#include "libc/limits.h"
 #include "libc/log/internal.h"
-#include "libc/macros.internal.h"
-#include "libc/mem/alloca.h"
 #include "libc/nexgen32e/rdtsc.h"
 #include "libc/nexgen32e/uart.internal.h"
 #include "libc/nt/createfile.h"
@@ -56,25 +42,21 @@
 #include "libc/nt/process.h"
 #include "libc/nt/runtime.h"
 #include "libc/nt/thunk/msabi.h"
-#include "libc/nt/winsock.h"
 #include "libc/runtime/internal.h"
 #include "libc/runtime/memtrack.internal.h"
 #include "libc/runtime/runtime.h"
-#include "libc/runtime/stack.h"
 #include "libc/runtime/symbols.internal.h"
 #include "libc/stdckdint.h"
 #include "libc/str/str.h"
 #include "libc/str/tab.internal.h"
 #include "libc/str/utf16.h"
 #include "libc/sysv/consts/at.h"
-#include "libc/sysv/consts/auxv.h"
 #include "libc/sysv/consts/f.h"
 #include "libc/sysv/consts/fd.h"
 #include "libc/sysv/consts/fileno.h"
 #include "libc/sysv/consts/nr.h"
 #include "libc/sysv/consts/o.h"
 #include "libc/sysv/consts/prot.h"
-#include "libc/thread/posixthread.internal.h"
 #include "libc/thread/tls.h"
 #include "libc/thread/tls2.internal.h"
 #include "libc/vga/vga.internal.h"
@@ -766,16 +748,9 @@ privileged static size_t kformat(char *b, size_t n, const char *fmt,
             break;
           } else {
             type = 0;
-#if defined(SYSDEBUG) && _NTTRACE
-            strerror_r(e, z, sizeof(z));
-            s = z;
-#else
-            s = _strerrno(e);
-            if (!s) {
-              FormatInt32(z, e);
-              s = z;
+            if (!(s = _strerrno(e))) {
+              s = "EUNKNOWN";
             }
-#endif
             goto FormatString;
           }
         }
@@ -1145,8 +1120,7 @@ privileged void kvprintf(const char *fmt, va_list v) {
  *
  * Error numbers:
  *
- * - `%m` formats error (if strerror_wr if is linked)
- * - `%m` formats errno number (if strerror_wr isn't linked)
+ * - `%m` formats errno as string
  * - `% m` formats error with leading space if errno isn't zero
  * - `%lm` means favor WSAGetLastError() over GetLastError() if linked
  *
diff --git a/libc/intrin/strerror.c b/libc/intrin/strerror.c
index a09660205..ce8451c8d 100644
--- a/libc/intrin/strerror.c
+++ b/libc/intrin/strerror.c
@@ -17,21 +17,20 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/magnumstrs.internal.h"
-#include "libc/intrin/safemacros.internal.h"
 #include "libc/str/str.h"
 
+_Alignas(1) static char strerror_buf[128];
+
 /**
- * Converts errno value to string non-reentrantly.
+ * Returns string describing `err`.
+ *
+ * The application shall not modify the string returned.
+ *
  * @see strerror_r()
+ * @threadunsafe
  */
 char *strerror(int err) {
-  if (IsTiny()) {
-    return (char *)firstnonnull(_strerrno(err), "EUNKNOWN");
-  } else {
-    _Alignas(1) static char buf[512];
-    strerror_r(err, buf, sizeof(buf));
-    return buf;
-  }
+  strerror_r(err, strerror_buf, sizeof(strerror_buf));
+  return strerror_buf;
 }
diff --git a/libc/intrin/strerror_r.c b/libc/intrin/strerror_r.c
index 0a22a8d6e..f534570b7 100644
--- a/libc/intrin/strerror_r.c
+++ b/libc/intrin/strerror_r.c
@@ -16,25 +16,61 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#define ShouldUseMsabiAttribute() 1
 #include "libc/dce.h"
-#include "libc/intrin/strace.internal.h"
+#include "libc/errno.h"
+#include "libc/fmt/itoa.h"
+#include "libc/fmt/magnumstrs.internal.h"
 #include "libc/nt/runtime.h"
-#include "libc/nt/thunk/msabi.h"
 #include "libc/str/str.h"
-// clang-format off
-
-#if defined(SYSDEBUG) && _NTTRACE
-privileged
-#endif
 
 /**
  * Converts errno value to string.
  *
  * @param err is error number or zero if unknown
- * @return 0 on success, or error code
+ * @return 0 on success, or errno on error
+ * @raise ERANGE if insufficient buffer was available, in which case a
+ *     nul-terminated string is still copied to `buf`
  */
-int strerror_r(int err, char *buf, size_t size) {
-  int winerr = IsWindows() ? __imp_GetLastError() : 0;
-  return strerror_wr(err, winerr, buf, size);
+errno_t strerror_r(int err, char *buf, size_t size) {
+
+  int c;
+  char tmp[32];
+  char *p = buf;
+  char *pe = p + size;
+
+  // copy unix error information
+  const char *msg;
+  if (!err) {
+    msg = "No error information";
+  } else if (!(msg = _strerdoc(err))) {
+    FormatInt32(stpcpy(tmp, "Error "), err);
+    msg = tmp;
+  }
+  while ((c = *msg++) && p + 1 < pe) {
+    *p++ = c;
+  }
+
+  // copy windows error information
+  if (IsWindows()) {
+    uint32_t winerr;
+    if ((winerr = GetLastError()) != err) {
+      stpcpy(FormatUint32(stpcpy(tmp, " (win32 error "), winerr), ")");
+      msg = tmp;
+      while ((c = *msg++) && p + 1 < pe) {
+        *p++ = c;
+      }
+    }
+  }
+
+  // force nul terminator
+  if (p < pe) {
+    *p++ = 0;
+  }
+
+  // return result code
+  if (p < pe) {
+    return 0;
+  } else {
+    return ERANGE;
+  }
 }
diff --git a/libc/intrin/strerror_wr.greg.c b/libc/intrin/strerror_wr.greg.c
deleted file mode 100644
index df65d2f9f..000000000
--- a/libc/intrin/strerror_wr.greg.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2022 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#define ShouldUseMsabiAttribute() 1
-#include "libc/dce.h"
-#include "libc/fmt/fmt.h"
-#include "libc/fmt/magnumstrs.internal.h"
-#include "libc/intrin/kprintf.h"
-#include "libc/intrin/strace.internal.h"
-#include "libc/macros.internal.h"
-#include "libc/nt/enum/formatmessageflags.h"
-#include "libc/nt/enum/lang.h"
-#include "libc/nt/process.h"
-#include "libc/str/str.h"
-// clang-format off
-
-#if defined(SYSDEBUG) && _NTTRACE
-privileged
-#endif
-
-/**
- * Converts errno value to string with explicit windows errno too.
- *
- * @param err is error number or zero if unknown
- * @return 0 on success, or error code
- */
-int strerror_wr(int err, uint32_t winerr, char *buf, size_t size) {
-  /* kprintf() weakly depends on this function */
-  int c, n;
-  char16_t winmsg[256];
-  const char *sym, *msg;
-  /* wanting = false; */
-  if (!(sym = _strerrno(err))) {
-    sym = "EUNKNOWN";
-    /* wanting = true; */
-  }
-  if (!(msg = _strerdoc(err))) {
-    msg = "No error information";
-    /* wanting = true; */
-  }
-  if (IsTiny()) {
-    if (!sym) sym = "EUNKNOWN";
-    for (; (c = *sym++); --size)
-      if (size > 1) *buf++ = c;
-    if (size) *buf = 0;
-  } else if (!IsWindows() /* || ((err == winerr || !winerr) && !wanting) */) {
-    ksnprintf(buf, size, "%s/%d/%s", sym, err, msg);
-  } else {
-    if ((n = __imp_FormatMessageW(
-             kNtFormatMessageFromSystem | kNtFormatMessageIgnoreInserts, 0,
-             winerr, MAKELANGID(kNtLangNeutral, kNtSublangDefault), winmsg,
-             ARRAYLEN(winmsg), 0))) {
-      while ((n && winmsg[n - 1] <= ' ') || winmsg[n - 1] == '.') --n;
-      ksnprintf(buf, size, "%s/%d/%s/%d/%.*hs", sym, err, msg, winerr, n,
-                winmsg);
-    } else {
-      ksnprintf(buf, size, "%s/%d/%s/%d", sym, err, msg, winerr);
-    }
-  }
-  return 0;
-}
diff --git a/libc/intrin/strsignal.c b/libc/intrin/strsignal.c
index c4d34f21f..2daab1ad6 100644
--- a/libc/intrin/strsignal.c
+++ b/libc/intrin/strsignal.c
@@ -38,5 +38,5 @@ static char g_strsignal[21];
  * @threadunsafe
  */
 char *strsignal(int sig) {
-  return strsignal_r(sig, g_strsignal);
+  return (char *)strsignal_r(sig, g_strsignal);
 }
diff --git a/libc/intrin/strsignal_r.c b/libc/intrin/strsignal_r.c
index 9d8c3ae5f..c8a6e9a6d 100644
--- a/libc/intrin/strsignal_r.c
+++ b/libc/intrin/strsignal_r.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/itoa.h"
 #include "libc/fmt/magnumstrs.internal.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/sig.h"
@@ -26,8 +25,7 @@
  *
  * This returns `"0"` for 0 which is the empty value. Symbolic names
  * should be available for signals 1 through 32. If the system supports
- * real-time signals, they're returned as `SIGRTMIN+%d`. For all other
- * 32-bit signed integer, a plain integer representation is returned.
+ * real-time signals, they're returned as `SIGRTMIN+%d`.
  *
  * @param sig is signal number which should be in range 1 through 128
  * @param buf may be used to store output having at least 15 bytes
@@ -35,13 +33,14 @@
  * @see sigaction()
  * @asyncsignalsafe
  */
-privileged char *strsignal_r(int sig, char buf[21]) {
+privileged const char *strsignal_r(int sig, char buf[21]) {
+  char *p;
   const char *s;
   if (!sig) {
     return "0";
   }
   if ((s = GetMagnumStr(kSignalNames, sig))) {
-    return (char *)s;
+    return s;
   }
   if (SIGRTMIN <= sig && sig <= SIGRTMAX) {
     sig -= SIGRTMIN;
@@ -54,9 +53,13 @@ privileged char *strsignal_r(int sig, char buf[21]) {
     buf[6] = 'I';
     buf[7] = 'N';
     buf[8] = '+';
-    FormatInt32(buf + 9, sig);
+    p = buf + 9;
   } else {
-    FormatInt32(buf, sig);
+    p = buf;
   }
+  if (sig >= 100) *p++ = '0' + (unsigned char)sig / 100 % 10;
+  if (sig >= 10) *p++ = '0' + (unsigned char)sig / 10 % 10;
+  *p++ = '0' + (unsigned char)sig % 10;
+  *p = 0;
   return buf;
 }
diff --git a/libc/intrin/ubsan.c b/libc/intrin/ubsan.c
index 7b7c3186f..4a0adc832 100644
--- a/libc/intrin/ubsan.c
+++ b/libc/intrin/ubsan.c
@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/kprintf.h"
 #include "libc/intrin/pushpop.internal.h"
 #include "libc/intrin/strace.internal.h"
diff --git a/libc/isystem/stdio.h b/libc/isystem/stdio.h
index 44626f4fd..2e50acbc4 100644
--- a/libc/isystem/stdio.h
+++ b/libc/isystem/stdio.h
@@ -2,7 +2,6 @@
 #define _STDIO_H
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/libc/isystem/stdlib.h b/libc/isystem/stdlib.h
index dd331a30e..422888746 100644
--- a/libc/isystem/stdlib.h
+++ b/libc/isystem/stdlib.h
@@ -10,6 +10,7 @@
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/rand.h"
+#include "libc/stdlib.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/exit.h"
 #include "libc/temp.h"
diff --git a/libc/log/attachdebugger.c b/libc/log/attachdebugger.c
index 9068766de..3e7a916aa 100644
--- a/libc/log/attachdebugger.c
+++ b/libc/log/attachdebugger.c
@@ -19,7 +19,6 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/syscall-sysv.internal.h"
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/log/color.internal.h"
diff --git a/libc/log/backtrace3.c b/libc/log/backtrace3.c
index e49f6f78c..ff9dab21b 100644
--- a/libc/log/backtrace3.c
+++ b/libc/log/backtrace3.c
@@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
 #include "libc/calls/calls.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/intrin/kprintf.h"
 #include "libc/intrin/weaken.h"
diff --git a/libc/log/checkfail.c b/libc/log/checkfail.c
index 29be8f882..102a1f9a0 100644
--- a/libc/log/checkfail.c
+++ b/libc/log/checkfail.c
@@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/kprintf.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/intrin/strace.internal.h"
@@ -32,8 +31,6 @@
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 
-__static_yoink("strerror_wr");
-
 /**
  * Handles failure of CHECK_xx() macros.
  */
diff --git a/libc/log/cxaprintexits.c b/libc/log/cxaprintexits.c
index cf042e434..07fee066d 100644
--- a/libc/log/cxaprintexits.c
+++ b/libc/log/cxaprintexits.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/bsf.h"
 #include "libc/intrin/cxaatexit.internal.h"
 #include "libc/log/log.h"
diff --git a/libc/log/gdbexec.c b/libc/log/gdbexec.c
index 00ba480a8..a179253be 100644
--- a/libc/log/gdbexec.c
+++ b/libc/log/gdbexec.c
@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/log/gdb.h"
 #include "libc/log/log.h"
diff --git a/libc/log/logerrno.c b/libc/log/logerrno.c
index 69be9d43b..da9dbc539 100644
--- a/libc/log/logerrno.c
+++ b/libc/log/logerrno.c
@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
diff --git a/libc/log/meminfo.c b/libc/log/meminfo.c
index ed39d5e19..e219dac00 100644
--- a/libc/log/meminfo.c
+++ b/libc/log/meminfo.c
@@ -17,14 +17,13 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
-#include "libc/stdio/dprintf.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/mem/mem.h"
+#include "libc/stdio/dprintf.h"
 
 static void onmemchunk(void *start, void *end, size_t used_bytes, void *arg) {
-  (dprintf)(*(int *)arg, "%p - %p : %08zx / %08lx\n", start, end, used_bytes,
-            (intptr_t)end - (intptr_t)start);
+  dprintf(*(int *)arg, "%p - %p : %08zx / %08lx\n", start, end, used_bytes,
+          (intptr_t)end - (intptr_t)start);
 }
 
 /**
@@ -32,7 +31,6 @@ static void onmemchunk(void *start, void *end, size_t used_bytes, void *arg) {
  */
 void _meminfo(int fd) {
   _memsummary(fd);
-  (dprintf)(fd, "%*s   %*s   %*s   %*s\n", POINTER_XDIGITS, "start",
-            POINTER_XDIGITS, "end", 8, "used", 8, "size");
+  dprintf(fd, "%12s   %12s   %8s   %8s\n", "start", "end", "used", "size");
   malloc_inspect_all(onmemchunk, &fd);
 }
diff --git a/libc/log/oncrash_amd64.c b/libc/log/oncrash_amd64.c
index c93409ebd..eab3c58a1 100644
--- a/libc/log/oncrash_amd64.c
+++ b/libc/log/oncrash_amd64.c
@@ -58,9 +58,6 @@
 #include "libc/thread/tls.h"
 #ifdef __x86_64__
 
-__static_yoink("strerror_wr");  // for kprintf %m
-__static_yoink("strsignal_r");  // for kprintf %G
-
 #define STACK_ERROR "error: not enough room on stack to print crash report\n"
 
 static const char kGregOrder[17] forcealign(1) = {
diff --git a/libc/log/oncrash_arm64.c b/libc/log/oncrash_arm64.c
index a92e7cbb2..eceeb654c 100644
--- a/libc/log/oncrash_arm64.c
+++ b/libc/log/oncrash_arm64.c
@@ -51,9 +51,6 @@
 #include "libc/thread/thread.h"
 #ifdef __aarch64__
 
-__static_yoink("strerror_wr");  // for kprintf %m
-__static_yoink("strsignal_r");  // for kprintf %G
-
 #define STACK_ERROR "error: not enough room on stack to print crash report\n"
 
 #define RESET   "\e[0m"
diff --git a/libc/log/vflogf.c b/libc/log/vflogf.c
index cd49350d4..bc30362b4 100644
--- a/libc/log/vflogf.c
+++ b/libc/log/vflogf.c
@@ -24,7 +24,6 @@
 #include "libc/dce.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/libgen.h"
 #include "libc/intrin/bits.h"
 #include "libc/intrin/safemacros.internal.h"
diff --git a/libc/nt/kernel32/FormatMessageA.S b/libc/nt/kernel32/FormatMessageA.S
new file mode 100644
index 000000000..606d454e1
--- /dev/null
+++ b/libc/nt/kernel32/FormatMessageA.S
@@ -0,0 +1,18 @@
+#include "libc/nt/codegen.h"
+.imp	kernel32,__imp_FormatMessageA,FormatMessageA
+
+	.text.windows
+        .ftrace1
+FormatMessageA:
+        .ftrace2
+#ifdef __x86_64__
+	push	%rbp
+	mov	%rsp,%rbp
+	mov	__imp_FormatMessageA(%rip),%rax
+	jmp	__sysv2nt8
+#elif defined(__aarch64__)
+	mov	x0,#0
+	ret
+#endif
+	.endfn	FormatMessageA,globl
+	.previous
diff --git a/libc/nt/master.sh b/libc/nt/master.sh
index 471f24695..39c6e9c8d 100755
--- a/libc/nt/master.sh
+++ b/libc/nt/master.sh
@@ -87,6 +87,7 @@ imp	'FindNextVolume'					FindNextVolumeW						kernel32	3
 imp	'FindVolumeClose'					FindVolumeClose						kernel32	1
 imp	'FlushConsoleInputBuffer'				FlushConsoleInputBuffer					kernel32	1
 imp	'FormatMessage'						FormatMessageW						kernel32	7
+imp	'FormatMessageA'					FormatMessageA						kernel32	7
 imp	'FreeConsole'						FreeConsole						kernel32	0
 imp	'FreeEnvironmentStrings'				FreeEnvironmentStringsW					kernel32	1
 imp	'FreeLibrary'						FreeLibrary						kernel32	1
diff --git a/libc/nt/process.h b/libc/nt/process.h
index 7f2127535..1d2ce2e02 100644
--- a/libc/nt/process.h
+++ b/libc/nt/process.h
@@ -51,6 +51,9 @@ void SetLastError(uint32_t dwErrCode);
 uint32_t FormatMessage(uint32_t dwFlags, const void *lpSource,
                        uint32_t dwMessageId, uint32_t dwLanguageId,
                        char16_t *lpBuffer, uint32_t nSize, va_list *Arguments);
+uint32_t FormatMessageA(uint32_t dwFlags, const void *lpSource,
+                        uint32_t dwMessageId, uint32_t dwLanguageId,
+                        char *lpBuffer, uint32_t nSize, va_list *Arguments);
 int64_t OpenProcess(uint32_t dwDesiredAccess, bool32 bInheritHandle,
                     uint32_t dwProcessId);
 uint32_t GetCurrentProcessId(void); /* %gs:0x40 */
diff --git a/libc/runtime/printgarbage.c b/libc/runtime/printgarbage.c
index 9f79267e7..e55e69f65 100644
--- a/libc/runtime/printgarbage.c
+++ b/libc/runtime/printgarbage.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/kprintf.h"
 #include "libc/log/log.h"
 #include "libc/nexgen32e/gc.internal.h"
diff --git a/libc/runtime/runtime.h b/libc/runtime/runtime.h
index 6421b7ea2..6e798063b 100644
--- a/libc/runtime/runtime.h
+++ b/libc/runtime/runtime.h
@@ -115,6 +115,7 @@ bool32 _isheap(void *);
 /* code morphing */
 void __morph_begin(void);
 void __morph_end(void);
+void __clear_cache(void *, void *);
 /* portability */
 int NtGetVersion(void) pureconst;
 bool32 IsGenuineBlink(void);
diff --git a/libc/sock/inet_pton.c b/libc/sock/inet_pton.c
index 2dc67e3d8..289f05a59 100644
--- a/libc/sock/inet_pton.c
+++ b/libc/sock/inet_pton.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/macros.internal.h"
 #include "libc/sock/internal.h"
 #include "libc/sock/sock.h"
diff --git a/libc/sock/syslog.c b/libc/sock/syslog.c
index 802acc628..5d2afdfa2 100644
--- a/libc/sock/syslog.c
+++ b/libc/sock/syslog.c
@@ -23,7 +23,6 @@
 #include "libc/calls/weirdtypes.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/log/internal.h"
 #include "libc/macros.internal.h"
diff --git a/libc/stdio/demangle.c b/libc/stdio/demangle.c
index 08ea6d6b6..344ad432f 100644
--- a/libc/stdio/demangle.c
+++ b/libc/stdio/demangle.c
@@ -30,7 +30,6 @@
 #include "libc/cxxabi.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
diff --git a/libc/stdio/ecvt.c b/libc/stdio/ecvt.c
index 2eba91728..11a76b7d3 100644
--- a/libc/stdio/ecvt.c
+++ b/libc/stdio/ecvt.c
@@ -22,7 +22,6 @@
 │ Materiel Command, USAF, under agreement number F39502-99-1-0512.             │
 │ SUCH DAMAGE.                                                                 │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
 #include "libc/str/str.h"
diff --git a/libc/stdio/fmt.c b/libc/stdio/fmt.c
index d208a008f..d9d0f9bde 100644
--- a/libc/stdio/fmt.c
+++ b/libc/stdio/fmt.c
@@ -38,7 +38,6 @@
 │ ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF               │
 │ THIS SOFTWARE.                                                               │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/assert.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
diff --git a/libc/stdio/fscanf.c b/libc/stdio/fscanf.c
index c5bb44d72..e586ca170 100644
--- a/libc/stdio/fscanf.c
+++ b/libc/stdio/fscanf.c
@@ -16,7 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/stdio/stdio.h"
 
 /**
diff --git a/libc/stdio/gcvt.c b/libc/stdio/gcvt.c
index 662b0df13..941164c66 100644
--- a/libc/stdio/gcvt.c
+++ b/libc/stdio/gcvt.c
@@ -22,7 +22,6 @@
 │ Materiel Command, USAF, under agreement number F39502-99-1-0512.             │
 │ SUCH DAMAGE.                                                                 │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
diff --git a/libc/stdio/scanf.c b/libc/stdio/scanf.c
index 5f91b5093..332979a9a 100644
--- a/libc/stdio/scanf.c
+++ b/libc/stdio/scanf.c
@@ -17,7 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/struct/fd.internal.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/stdio/stdio.h"
 
 /**
diff --git a/libc/stdio/sprintf.c b/libc/stdio/sprintf.c
index d819f9f2a..4514fb91f 100644
--- a/libc/stdio/sprintf.c
+++ b/libc/stdio/sprintf.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/log/log.h"
 
diff --git a/libc/stdio/sscanf.c b/libc/stdio/sscanf.c
index 0e688e327..3199b3fe1 100644
--- a/libc/stdio/sscanf.c
+++ b/libc/stdio/sscanf.c
@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 
 /**
diff --git a/libc/stdio/vcscanf.c b/libc/stdio/vcscanf.c
index c77220582..f67d1bcc3 100644
--- a/libc/stdio/vcscanf.c
+++ b/libc/stdio/vcscanf.c
@@ -17,7 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/limits.h"
 #include "libc/mem/internal.h"
 #include "libc/mem/mem.h"
diff --git a/libc/stdio/vdprintf.c b/libc/stdio/vdprintf.c
index 7e2471772..ec198018b 100644
--- a/libc/stdio/vdprintf.c
+++ b/libc/stdio/vdprintf.c
@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/struct/iovec.internal.h"
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/limits.h"
 #include "libc/macros.internal.h"
 #include "libc/nt/files.h"
diff --git a/libc/stdio/vfprintf_unlocked.c b/libc/stdio/vfprintf_unlocked.c
index 2dce1045e..3f7c8b645 100644
--- a/libc/stdio/vfprintf_unlocked.c
+++ b/libc/stdio/vfprintf_unlocked.c
@@ -17,7 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/stdckdint.h"
 #include "libc/stdio/internal.h"
 #include "libc/stdio/stdio.h"
diff --git a/libc/stdio/vfscanf.c b/libc/stdio/vfscanf.c
index e61acd9e1..923b73b79 100644
--- a/libc/stdio/vfscanf.c
+++ b/libc/stdio/vfscanf.c
@@ -16,7 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/stdio/stdio.h"
 
 /**
diff --git a/libc/stdio/vscanf.c b/libc/stdio/vscanf.c
index 09230df2f..4cace74f0 100644
--- a/libc/stdio/vscanf.c
+++ b/libc/stdio/vscanf.c
@@ -16,7 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/stdio/stdio.h"
 
 /**
diff --git a/libc/stdio/vsnprintf.c b/libc/stdio/vsnprintf.c
index dfed1ed20..62887c0f6 100644
--- a/libc/stdio/vsnprintf.c
+++ b/libc/stdio/vsnprintf.c
@@ -18,7 +18,7 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 #include "libc/limits.h"
 #include "libc/macros.internal.h"
 #include "libc/runtime/runtime.h"
diff --git a/libc/stdio/vsscanf.c b/libc/stdio/vsscanf.c
index 570750b18..e2aea7618 100644
--- a/libc/stdio/vsscanf.c
+++ b/libc/stdio/vsscanf.c
@@ -17,7 +17,7 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
+#include "libc/fmt/internal.h"
 
 struct StringScannerState {
   const unsigned char *s;
diff --git a/libc/stdlib.h b/libc/stdlib.h
new file mode 100644
index 000000000..c69f90e05
--- /dev/null
+++ b/libc/stdlib.h
@@ -0,0 +1,12 @@
+#ifndef COSMOPOLITAN_LIBC_STDLIB_H_
+#define COSMOPOLITAN_LIBC_STDLIB_H_
+#if !(__ASSEMBLER__ + __LINKER__ + 0)
+COSMOPOLITAN_C_START_
+
+char *fcvt(double, int, int *, int *);
+char *ecvt(double, int, int *, int *);
+char *gcvt(double, int, char *);
+
+COSMOPOLITAN_C_END_
+#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
+#endif /* COSMOPOLITAN_LIBC_STDLIB_H_ */
diff --git a/libc/str/mbstowcs.c b/libc/str/mbstowcs.c
index 7a2b56ddc..e95df30ae 100644
--- a/libc/str/mbstowcs.c
+++ b/libc/str/mbstowcs.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 
 size_t mbstowcs(wchar_t *pwc, const char *s, size_t wn) {
diff --git a/libc/str/str.h b/libc/str/str.h
index aa3f9f58e..e5c81bc7c 100644
--- a/libc/str/str.h
+++ b/libc/str/str.h
@@ -168,10 +168,8 @@ wint_t towctrans(wint_t, wctrans_t);
 int getsubopt(char **, char *const *, char **) paramsnonnull();
 char *strsignal(int) returnsnonnull libcesque;
 char *strerror(int) returnsnonnull dontthrow nocallback;
-int strerror_r(int, char *, size_t)
-dontthrow nocallback;
-int __xpg_strerror_r(int, char *, size_t)
-dontthrow nocallback;
+errno_t strerror_r(int, char *, size_t) libcesque;
+char *__xpg_strerror_r(int, char *, size_t) libcesque;
 
 #ifdef _COSMO_SOURCE
 uint64_t tpenc(uint32_t) pureconst;
@@ -183,9 +181,7 @@ bool32 startswithi(const char *, const char *) strlenesque;
 bool32 endswith(const char *, const char *) strlenesque;
 bool32 istext(const void *, size_t) libcesque;
 bool32 isutf8(const void *, size_t) libcesque;
-char *strsignal_r(int, char[21]) returnsnonnull libcesque __wur;
-int strerror_wr(int, uint32_t, char *, size_t)
-dontthrow nocallback;
+const char *strsignal_r(int, char[21]) returnsnonnull libcesque __wur;
 char16_t *chomp16(char16_t *) libcesque;
 size_t strlen16(const char16_t *) strlenesque;
 size_t strnlen16(const char16_t *, size_t) strlenesque;
diff --git a/libc/sysv/consts.sh b/libc/sysv/consts.sh
index e100d4da3..55bfad42a 100755
--- a/libc/sysv/consts.sh
+++ b/libc/sysv/consts.sh
@@ -469,7 +469,7 @@ syscon	rlimit	RLIMIT_RSS				5			5			5			5			5			5			5			127			# max physical mem
 syscon	rlimit	RLIMIT_NPROC				6			6			7			7			7			7			7			127			# max number of processes; see fork()→EAGAIN; bsd consensus
 syscon	rlimit	RLIMIT_NOFILE				7			7			8			8			8			8			8			127			# max number of open files; see accept()→EMFILE/ENFILE; bsd consensus
 syscon	rlimit	RLIMIT_MEMLOCK				8			8			6			6			6			6			6			127			# max locked-in-memory address space; bsd consensus
-syscon	rlimit	RLIMIT_AS				9			9			5			5			10			2			10			0			# max virtual memory size in bytes; this one actually works; fudged as RLIMIT_DATA on OpenBSD
+syscon	rlimit	RLIMIT_AS				9\			9			5			5			10			2			10			0			# max virtual memory size in bytes; this one actually works; fudged as RLIMIT_DATA on OpenBSD
 syscon	rlimit	RLIMIT_LOCKS				10			10			127			127			127			127			127			127			# max flock() / fcntl() locks; bsd consensus
 syscon	rlimit	RLIMIT_SIGPENDING			11			11			127			127			127			127			127			127			# max sigqueue() can enqueue; bsd consensus
 syscon	rlimit	RLIMIT_MSGQUEUE				12			12			127			127			127			127			127			127			# meh posix message queues; bsd consensus
diff --git a/libc/sysv/consts/sig.h b/libc/sysv/consts/sig.h
index ecd768248..21e4d683b 100644
--- a/libc/sysv/consts/sig.h
+++ b/libc/sysv/consts/sig.h
@@ -80,21 +80,22 @@ COSMOPOLITAN_C_END_
  *   hasn't fleshed them out yet.
  *
  * - SIGTHR doesn't have a macro since it's internal to posix threads.
+ *
+ * - SIGSTKFLT is Linux-only so no macro is defined.
  */
 
-#define SIGBUS    SIGBUS
-#define SIGCHLD   SIGCHLD
-#define SIGCONT   SIGCONT
-#define SIGEMT    SIGEMT
-#define SIGINFO   SIGINFO
-#define SIGPWR    SIGPWR
-#define SIGSTKFLT SIGSTKFLT
-#define SIGSTOP   SIGSTOP
-#define SIGSYS    SIGSYS
-#define SIGTSTP   SIGTSTP
-#define SIGURG    SIGURG
-#define SIGUSR1   SIGUSR1
-#define SIGUSR2   SIGUSR2
+#define SIGBUS  SIGBUS
+#define SIGCHLD SIGCHLD
+#define SIGCONT SIGCONT
+#define SIGEMT  SIGEMT
+#define SIGINFO SIGINFO
+#define SIGPWR  SIGPWR
+#define SIGSTOP SIGSTOP
+#define SIGSYS  SIGSYS
+#define SIGTSTP SIGTSTP
+#define SIGURG  SIGURG
+#define SIGUSR1 SIGUSR1
+#define SIGUSR2 SIGUSR2
 
 #define SIG_BLOCK   SIG_BLOCK
 #define SIG_SETMASK SIG_SETMASK
diff --git a/libc/testlib/showerror.c b/libc/testlib/showerror.c
index 737a94661..4def3ce33 100644
--- a/libc/testlib/showerror.c
+++ b/libc/testlib/showerror.c
@@ -20,7 +20,6 @@
 #include "libc/assert.h"
 #include "libc/calls/calls.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/intrin/atomic.h"
 #include "libc/intrin/kprintf.h"
diff --git a/libc/time/asctime.c b/libc/time/asctime.c
index a5350228b..1762165e7 100644
--- a/libc/time/asctime.c
+++ b/libc/time/asctime.c
@@ -1,4 +1,3 @@
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 #include "libc/time/struct/tm.h"
 #include "libc/time/time.h"
diff --git a/libc/time/strftime.c b/libc/time/strftime.c
index 46e4cf69b..33a7d07f9 100644
--- a/libc/time/strftime.c
+++ b/libc/time/strftime.c
@@ -16,7 +16,6 @@
 │ IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED               │
 │ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.          │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/inttypes.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/locale.h"
diff --git a/test/libc/calls/fcntl_test.c b/test/libc/calls/fcntl_test.c
index 1dd17eab7..600d0097c 100644
--- a/test/libc/calls/fcntl_test.c
+++ b/test/libc/calls/fcntl_test.c
@@ -21,7 +21,6 @@
 #include "libc/calls/struct/sigaction.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/check.h"
 #include "libc/macros.internal.h"
 #include "libc/runtime/runtime.h"
diff --git a/test/libc/calls/lseek_test.c b/test/libc/calls/lseek_test.c
index 04146c83b..c64e7d6fc 100644
--- a/test/libc/calls/lseek_test.c
+++ b/test/libc/calls/lseek_test.c
@@ -20,7 +20,6 @@
 #include "libc/calls/internal.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/log/check.h"
 #include "libc/runtime/runtime.h"
diff --git a/test/libc/calls/mkdir_test.c b/test/libc/calls/mkdir_test.c
index fb8029ddb..27d94e5d6 100644
--- a/test/libc/calls/mkdir_test.c
+++ b/test/libc/calls/mkdir_test.c
@@ -19,7 +19,6 @@
 #include "libc/calls/calls.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/check.h"
 #include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
diff --git a/test/libc/fmt/formatbinary64_test.c b/test/libc/fmt/formatbinary64_test.c
index 3a42b1d16..5fb26d90e 100644
--- a/test/libc/fmt/formatbinary64_test.c
+++ b/test/libc/fmt/formatbinary64_test.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/str/str.h"
 #include "libc/testlib/ezbench.h"
diff --git a/test/libc/fmt/formatflex64_test.c b/test/libc/fmt/formatflex64_test.c
index 1e2db887c..b5340d38e 100644
--- a/test/libc/fmt/formatflex64_test.c
+++ b/test/libc/fmt/formatflex64_test.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/str/str.h"
 #include "libc/testlib/testlib.h"
diff --git a/test/libc/fmt/formathex64_test.c b/test/libc/fmt/formathex64_test.c
index 9240de080..9cfb89d2d 100644
--- a/test/libc/fmt/formathex64_test.c
+++ b/test/libc/fmt/formathex64_test.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/str/str.h"
 #include "libc/testlib/ezbench.h"
diff --git a/test/libc/fmt/itoa64radix16_test.c b/test/libc/fmt/itoa64radix16_test.c
deleted file mode 100644
index 97c4af923..000000000
--- a/test/libc/fmt/itoa64radix16_test.c
+++ /dev/null
@@ -1,36 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/itoa.h"
-#include "libc/testlib/testlib.h"
-
-TEST(itoa64radix16, test) {
-  char buf[21];
-  EXPECT_EQ(5, uint64toarray_radix16(0x31337, buf));
-  EXPECT_STREQ("31337", buf);
-  EXPECT_EQ(2, uint64toarray_radix16(0x13, buf));
-  EXPECT_STREQ("13", buf);
-  EXPECT_EQ(3, uint64toarray_radix16(0x113, buf));
-  EXPECT_STREQ("113", buf);
-}
-
-TEST(itoa64fixed16, test) {
-  char buf[21];
-  EXPECT_EQ(8, uint64toarray_fixed16(0x31337, buf, 32));
-  EXPECT_STREQ("00031337", buf);
-}
diff --git a/test/libc/fmt/strerror_r_test.c b/test/libc/fmt/strerror_r_test.c
index 1fe1c8634..6dcba8de2 100644
--- a/test/libc/fmt/strerror_r_test.c
+++ b/test/libc/fmt/strerror_r_test.c
@@ -16,10 +16,9 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/bits.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
+#include "libc/intrin/bits.h"
 #include "libc/str/str.h"
 #include "libc/testlib/testlib.h"
 
@@ -30,25 +29,25 @@
  */
 
 TEST(strerror, e2big) {
-  EXPECT_STARTSWITH("E2BIG", strerror(E2BIG));
+  EXPECT_STARTSWITH("Arg list too long", strerror(E2BIG));
 }
 
 TEST(strerror, enosys) {
-  EXPECT_STARTSWITH("ENOSYS", strerror(ENOSYS));
+  EXPECT_STARTSWITH("Function not implemented", strerror(ENOSYS));
 }
 
 TEST(strerror, einval) {
-  EXPECT_STARTSWITH("EINVAL", strerror(EINVAL));
+  EXPECT_STARTSWITH("Invalid argument", strerror(EINVAL));
 }
 
 TEST(strerror, symbolizingTheseNumbersAsErrorsIsHeresyInUnixStyle) {
-  EXPECT_STARTSWITH("EUNKNOWN", strerror(0));
+  EXPECT_STARTSWITH("No error information", strerror(0));
 }
 
 TEST(strerror, enotconn_orLinkerIsntUsingLocaleC_orCodeIsOutOfSync) {
-  EXPECT_STARTSWITH("ENOTCONN", strerror(ENOTCONN));
+  EXPECT_STARTSWITH("Transport endpoint is not connected", strerror(ENOTCONN));
 }
 
 TEST(strerror, exfull_orLinkerIsntUsingLocaleC_orCodeIsOutOfSync) {
-  EXPECT_STARTSWITH("ETXTBSY", strerror(ETXTBSY));
+  EXPECT_STARTSWITH("Text file busy", strerror(ETXTBSY));
 }
diff --git a/test/libc/fmt/stripexts_test.c b/test/libc/fmt/stripexts_test.c
index b5e05b966..69ee3701f 100644
--- a/test/libc/fmt/stripexts_test.c
+++ b/test/libc/fmt/stripexts_test.c
@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/libgen.h"
 #include "libc/mem/gc.internal.h"
 #include "libc/testlib/testlib.h"
diff --git a/test/libc/intrin/strsignal_r_test.c b/test/libc/intrin/strsignal_r_test.c
index 412a89c91..fa346875d 100644
--- a/test/libc/intrin/strsignal_r_test.c
+++ b/test/libc/intrin/strsignal_r_test.c
@@ -27,9 +27,7 @@ TEST(strsignal, test) {
   EXPECT_STREQ("SIGALRM", strsignal(SIGALRM));
   EXPECT_STREQ("SIGUSR1", strsignal(SIGUSR1));
   EXPECT_STREQ("SIGSTOP", strsignal(SIGSTOP));
-  EXPECT_STREQ("666", strsignal(666));
-  EXPECT_STREQ("-1", strsignal(-1));
-  EXPECT_STREQ("9001", strsignal(9001));
+  EXPECT_STREQ("150", strsignal(150));
 }
 
 TEST(strsignal, realtime) {
diff --git a/test/libc/runtime/mmap_test.c b/test/libc/runtime/mmap_test.c
index a3278aee3..23fbb675a 100644
--- a/test/libc/runtime/mmap_test.c
+++ b/test/libc/runtime/mmap_test.c
@@ -21,7 +21,6 @@
 #include "libc/calls/ucontext.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/asan.internal.h"
 #include "libc/intrin/atomic.h"
 #include "libc/intrin/bits.h"
diff --git a/test/libc/runtime/mprotect_test.c b/test/libc/runtime/mprotect_test.c
index c32c8dc15..ad74aa2f7 100644
--- a/test/libc/runtime/mprotect_test.c
+++ b/test/libc/runtime/mprotect_test.c
@@ -21,7 +21,6 @@
 #include "libc/calls/ucontext.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/describeflags.internal.h"
 #include "libc/log/log.h"
 #include "libc/mem/gc.internal.h"
diff --git a/test/libc/stdio/dtoa_test.c b/test/libc/stdio/dtoa_test.c
index fb42dbfb5..492de1350 100644
--- a/test/libc/stdio/dtoa_test.c
+++ b/test/libc/stdio/dtoa_test.c
@@ -19,7 +19,6 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/struct/sched_param.h"
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
 #include "libc/macros.internal.h"
 #include "libc/math.h"
 #include "libc/mem/gc.internal.h"
diff --git a/test/libc/stdio/ecvt_test.c b/test/libc/stdio/ecvt_test.c
index dc6e9cd02..11dacb24e 100644
--- a/test/libc/stdio/ecvt_test.c
+++ b/test/libc/stdio/ecvt_test.c
@@ -16,8 +16,8 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/mem/gc.h"
+#include "libc/stdlib.h"
 #include "libc/testlib/testlib.h"
 #include "libc/x/x.h"
 #include "libc/x/xasprintf.h"
diff --git a/test/libc/stdio/fmt_test.c b/test/libc/stdio/fmt_test.c
index 7382b877e..bb3a1781e 100644
--- a/test/libc/stdio/fmt_test.c
+++ b/test/libc/stdio/fmt_test.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/log/log.h"
 #include "libc/math.h"
diff --git a/test/libc/stdio/palandprintf_test.c b/test/libc/stdio/palandprintf_test.c
index 456036b1d..9e2621088 100644
--- a/test/libc/stdio/palandprintf_test.c
+++ b/test/libc/stdio/palandprintf_test.c
@@ -657,8 +657,6 @@ BENCH(palandprintf, bench) {
   EZBENCH2("LONG_MIN %ld", donothing, Format("%ld", __veil("r", LONG_MIN)));
   EZBENCH2("INT128_MIN %jjd", donothing, Format("%jjd", INT128_MIN));
   EZBENCH2("INT128_MIN %jjx", donothing, Format("%jjx", INT128_MIN));
-  EZBENCH2("int64toarray 23", donothing, FormatInt64(buffer, 23));
-  EZBENCH2("int64toarray min", donothing, FormatInt64(buffer, INT_MIN));
 #ifdef __x86__
   EZBENCH2("%Lf M_PI", donothing, Format("%Lf", __veil("t", M_PI)));
   EZBENCH2("%Lg M_PI", donothing, Format("%Lg", __veil("t", M_PI)));
diff --git a/test/libc/stdio/popen_test.c b/test/libc/stdio/popen_test.c
index d54ee6f3f..40c31aaef 100644
--- a/test/libc/stdio/popen_test.c
+++ b/test/libc/stdio/popen_test.c
@@ -20,7 +20,6 @@
 #include "libc/calls/struct/sigaction.h"
 #include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/intrin/kprintf.h"
 #include "libc/limits.h"
diff --git a/test/libc/stdio/sprintf_s_test.c b/test/libc/stdio/sprintf_s_test.c
index 94637efa2..6e6ee611c 100644
--- a/test/libc/stdio/sprintf_s_test.c
+++ b/test/libc/stdio/sprintf_s_test.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/bits.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/mem/gc.h"
diff --git a/test/libc/stdio/sscanf_test.c b/test/libc/stdio/sscanf_test.c
index e1408c09a..42ce7b60c 100644
--- a/test/libc/stdio/sscanf_test.c
+++ b/test/libc/stdio/sscanf_test.c
@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/bits.h"
 #include "libc/inttypes.h"
 #include "libc/limits.h"
diff --git a/test/libc/tinymath/powl_test.c b/test/libc/tinymath/powl_test.c
index fdf0f6584..2d33cab88 100644
--- a/test/libc/tinymath/powl_test.c
+++ b/test/libc/tinymath/powl_test.c
@@ -20,7 +20,6 @@
 #include "libc/calls/struct/siginfo.h"
 #include "libc/calls/ucontext.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/macros.internal.h"
 #include "libc/math.h"
 #include "libc/mem/gc.h"
diff --git a/third_party/argon2/encoding.c b/third_party/argon2/encoding.c
index 64d3bb3ed..ade7edbc2 100644
--- a/third_party/argon2/encoding.c
+++ b/third_party/argon2/encoding.c
@@ -16,7 +16,6 @@
 │                                                                              │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "third_party/argon2/encoding.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
diff --git a/third_party/awk/awkgram.y b/third_party/awk/awkgram.y
index a1f1b64fe..8fc170906 100644
--- a/third_party/awk/awkgram.y
+++ b/third_party/awk/awkgram.y
@@ -23,13 +23,9 @@ THIS SOFTWARE.
 ****************************************************************/
 
 %{
-#include "libc/calls/calls.h"
-#include "libc/fmt/fmt.h"
-#include "libc/stdio/stdio.h"
-#include "libc/temp.h"
-#include "libc/mem/alg.h"
-#include "libc/str/str.h"
-#include "third_party/awk/awk.h"
+#include <stdio.h>
+#include <string.h>
+#include "awk.h"
 
 void checkdup(Node *list, Cell *item);
 int yywrap(void) { return(1); }
diff --git a/third_party/awk/lex.c b/third_party/awk/lex.c
index 7ce8db900..e9af4b42b 100644
--- a/third_party/awk/lex.c
+++ b/third_party/awk/lex.c
@@ -27,7 +27,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
diff --git a/third_party/awk/lib.c b/third_party/awk/lib.c
index a7e1b2718..62f9f506f 100644
--- a/third_party/awk/lib.c
+++ b/third_party/awk/lib.c
@@ -29,7 +29,6 @@
 #include "libc/calls/calls.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/math.h"
 #include "libc/mem/mem.h"
diff --git a/third_party/awk/maketab.c b/third_party/awk/maketab.c
index 4f30c0064..b91232dc2 100644
--- a/third_party/awk/maketab.c
+++ b/third_party/awk/maketab.c
@@ -25,7 +25,6 @@
 │ THIS SOFTWARE.                                                               │
 │                                                                              │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
@@ -126,13 +125,9 @@ int main(int argc, char *argv[])
 	char buf[200], name[200], def[200];
 	enum { TOK_UNKNOWN, TOK_ENUM, TOK_DEFINE } tokentype = TOK_UNKNOWN;
 
-	printf("#include \"libc/calls/calls.h\"\n");
-        printf("#include \"libc/fmt/fmt.h\"\n");
-        printf("#include \"libc/stdio/lock.h\"\n");
-        printf("#include \"libc/stdio/stdio.h\"\n");
-        printf("#include \"libc/stdio/temp.h\"\n");
-	printf("#include \"third_party/awk/awk.h\"\n");
-	printf("#include \"third_party/awk/awkgram.tab.h\"\n\n");
+	printf("#include <stdio.h>\n");
+	printf("#include \"awk.h\"\n");
+	printf("#include \"awkgram.tab.h\"\n\n");
 
 	if (argc != 2) {
 		fprintf(stderr, "usage: maketab YTAB_H\n");
diff --git a/third_party/awk/proctab.c b/third_party/awk/proctab.c
index 59c98241d..40ebb509c 100644
--- a/third_party/awk/proctab.c
+++ b/third_party/awk/proctab.c
@@ -25,7 +25,6 @@
 │ THIS SOFTWARE.                                                               │
 │                                                                              │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "third_party/awk/awk.h"
 #include "third_party/awk/awkgram.tab.h"
 // clang-format off
diff --git a/third_party/awk/run.c b/third_party/awk/run.c
index 725892f1b..e4daf9411 100644
--- a/third_party/awk/run.c
+++ b/third_party/awk/run.c
@@ -30,7 +30,6 @@
 #include "libc/calls/weirdtypes.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
 #include "libc/str/str.h"
diff --git a/third_party/awk/tran.c b/third_party/awk/tran.c
index 335cfa402..266a7077c 100644
--- a/third_party/awk/tran.c
+++ b/third_party/awk/tran.c
@@ -27,7 +27,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #define DEBUG
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/math.h"
 #include "libc/mem/mem.h"
 #include "libc/str/str.h"
diff --git a/third_party/bzip2/bzip2recover.c b/third_party/bzip2/bzip2recover.c
index c54dcec88..917be8360 100644
--- a/third_party/bzip2/bzip2recover.c
+++ b/third_party/bzip2/bzip2recover.c
@@ -1,6 +1,5 @@
 #include "libc/calls/calls.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
diff --git a/third_party/chibicc/chibicc.h b/third_party/chibicc/chibicc.h
index f0ae7f862..46e79cef3 100644
--- a/third_party/chibicc/chibicc.h
+++ b/third_party/chibicc/chibicc.h
@@ -6,7 +6,6 @@
 #include "libc/calls/weirdtypes.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/intrin/popcnt.h"
 #include "libc/limits.h"
diff --git a/third_party/chibicc/test/test.h b/third_party/chibicc/test/test.h
index ac73acb07..1dc87b292 100644
--- a/third_party/chibicc/test/test.h
+++ b/third_party/chibicc/test/test.h
@@ -1,4 +1,3 @@
-#include "libc/fmt/fmt.h"
 #include "libc/runtime/runtime.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
diff --git a/third_party/compiler_rt/clear_cache.c b/third_party/compiler_rt/clear_cache.c
new file mode 100644
index 000000000..565e8152e
--- /dev/null
+++ b/third_party/compiler_rt/clear_cache.c
@@ -0,0 +1,148 @@
+//===-- clear_cache.c - Implement __clear_cache ---------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <assert.h>
+#include <stddef.h>
+#include "int_lib.h"
+
+#if __APPLE__
+#include <libkern/OSCacheControl.h>
+#endif
+
+#if defined(_WIN32)
+// Forward declare Win32 APIs since the GCC mode driver does not handle the
+// newer SDKs as well as needed.
+uint32_t FlushInstructionCache(uintptr_t hProcess, void *lpBaseAddress,
+                               uintptr_t dwSize);
+uintptr_t GetCurrentProcess(void);
+#endif
+
+#if defined(__FreeBSD__) && defined(__arm__)
+// clang-format off
+#include <sys/types.h>
+#include <machine/sysarch.h>
+// clang-format on
+#endif
+
+#if defined(__NetBSD__) && defined(__arm__)
+#include <machine/sysarch.h>
+#endif
+
+#if defined(__OpenBSD__) && defined(__mips__)
+// clang-format off
+#include <sys/types.h>
+#include <machine/sysarch.h>
+// clang-format on
+#endif
+
+#if defined(__linux__) && defined(__mips__)
+#include <sys/cachectl.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+#endif
+
+// The compiler generates calls to __clear_cache() when creating
+// trampoline functions on the stack for use with nested functions.
+// It is expected to invalidate the instruction cache for the
+// specified range.
+
+void __clear_cache(void *start, void *end) {
+#if __i386__ || __x86_64__ || defined(_M_IX86) || defined(_M_X64)
+// Intel processors have a unified instruction and data cache
+// so there is nothing to do
+#elif defined(_WIN32) && (defined(__arm__) || defined(__aarch64__))
+  FlushInstructionCache(GetCurrentProcess(), start, end - start);
+#elif defined(__arm__) && !defined(__APPLE__)
+#if defined(__FreeBSD__) || defined(__NetBSD__)
+  struct arm_sync_icache_args arg;
+
+  arg.addr = (uintptr_t)start;
+  arg.len = (uintptr_t)end - (uintptr_t)start;
+
+  sysarch(ARM_SYNC_ICACHE, &arg);
+#elif defined(__linux__)
+// We used to include asm/unistd.h for the __ARM_NR_cacheflush define, but
+// it also brought many other unused defines, as well as a dependency on
+// kernel headers to be installed.
+//
+// This value is stable at least since Linux 3.13 and should remain so for
+// compatibility reasons, warranting it's re-definition here.
+#define __ARM_NR_cacheflush 0x0f0002
+  register int start_reg __asm("r0") = (int)(intptr_t)start;
+  const register int end_reg __asm("r1") = (int)(intptr_t)end;
+  const register int flags __asm("r2") = 0;
+  const register int syscall_nr __asm("r7") = __ARM_NR_cacheflush;
+  __asm __volatile("svc 0x0"
+                   : "=r"(start_reg)
+                   : "r"(syscall_nr), "r"(start_reg), "r"(end_reg), "r"(flags));
+  assert(start_reg == 0 && "Cache flush syscall failed.");
+#else
+  compilerrt_abort();
+#endif
+#elif defined(__linux__) && defined(__mips__)
+  const uintptr_t start_int = (uintptr_t)start;
+  const uintptr_t end_int = (uintptr_t)end;
+  syscall(__NR_cacheflush, start, (end_int - start_int), BCACHE);
+#elif defined(__mips__) && defined(__OpenBSD__)
+  cacheflush(start, (uintptr_t)end - (uintptr_t)start, BCACHE);
+#elif defined(__aarch64__) && !defined(__APPLE__)
+  uint64_t xstart = (uint64_t)(uintptr_t)start;
+  uint64_t xend = (uint64_t)(uintptr_t)end;
+  uint64_t addr;
+
+  // Get Cache Type Info
+  uint64_t ctr_el0;
+  __asm __volatile("mrs %0, ctr_el0" : "=r"(ctr_el0));
+
+  // dc & ic instructions must use 64bit registers so we don't use
+  // uintptr_t in case this runs in an IPL32 environment.
+  const size_t dcache_line_size = 4 << ((ctr_el0 >> 16) & 15);
+  for (addr = xstart & ~(dcache_line_size - 1); addr < xend;
+       addr += dcache_line_size)
+    __asm __volatile("dc cvau, %0" ::"r"(addr));
+  __asm __volatile("dsb ish");
+
+  const size_t icache_line_size = 4 << ((ctr_el0 >> 0) & 15);
+  for (addr = xstart & ~(icache_line_size - 1); addr < xend;
+       addr += icache_line_size)
+    __asm __volatile("ic ivau, %0" ::"r"(addr));
+  __asm __volatile("isb sy");
+#elif defined(__powerpc64__)
+  const size_t line_size = 32;
+  const size_t len = (uintptr_t)end - (uintptr_t)start;
+
+  const uintptr_t mask = ~(line_size - 1);
+  const uintptr_t start_line = ((uintptr_t)start) & mask;
+  const uintptr_t end_line = ((uintptr_t)start + len + line_size - 1) & mask;
+
+  for (uintptr_t line = start_line; line < end_line; line += line_size)
+    __asm__ volatile("dcbf 0, %0" : : "r"(line));
+  __asm__ volatile("sync");
+
+  for (uintptr_t line = start_line; line < end_line; line += line_size)
+    __asm__ volatile("icbi 0, %0" : : "r"(line));
+  __asm__ volatile("isync");
+#elif defined(__sparc__)
+  const size_t dword_size = 8;
+  const size_t len = (uintptr_t)end - (uintptr_t)start;
+
+  const uintptr_t mask = ~(dword_size - 1);
+  const uintptr_t start_dword = ((uintptr_t)start) & mask;
+  const uintptr_t end_dword = ((uintptr_t)start + len + dword_size - 1) & mask;
+
+  for (uintptr_t dword = start_dword; dword < end_dword; dword += dword_size)
+    __asm__ volatile("flush %0" : : "r"(dword));
+#else
+#if __APPLE__
+  // On Darwin, sys_icache_invalidate() provides this functionality
+  sys_icache_invalidate(start, end - start);
+#else
+  compilerrt_abort();
+#endif
+#endif
+}
diff --git a/third_party/ctags/args.h b/third_party/ctags/args.h
index 5ff862cee..436e11ff8 100644
--- a/third_party/ctags/args.h
+++ b/third_party/ctags/args.h
@@ -20,7 +20,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/ctags/eiffel.c b/third_party/ctags/eiffel.c
index 42aa3295d..1b6f56bb9 100644
--- a/third_party/ctags/eiffel.c
+++ b/third_party/ctags/eiffel.c
@@ -21,7 +21,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/ctags/entry.h b/third_party/ctags/entry.h
index ab8d0a0e4..413ba3516 100644
--- a/third_party/ctags/entry.h
+++ b/third_party/ctags/entry.h
@@ -20,7 +20,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/ctags/flex.c b/third_party/ctags/flex.c
index 72762e113..cc2a27acd 100644
--- a/third_party/ctags/flex.c
+++ b/third_party/ctags/flex.c
@@ -27,7 +27,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/ctags/jscript.c b/third_party/ctags/jscript.c
index c199ddff5..719aeb98e 100644
--- a/third_party/ctags/jscript.c
+++ b/third_party/ctags/jscript.c
@@ -26,7 +26,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/ctags/main.h b/third_party/ctags/main.h
index 4728a2643..eb8e96658 100644
--- a/third_party/ctags/main.h
+++ b/third_party/ctags/main.h
@@ -20,7 +20,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/ctags/options.c b/third_party/ctags/options.c
index 631a2584e..0f259ac67 100644
--- a/third_party/ctags/options.c
+++ b/third_party/ctags/options.c
@@ -36,7 +36,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/ctags/read.h b/third_party/ctags/read.h
index b1b07231d..88ad04697 100644
--- a/third_party/ctags/read.h
+++ b/third_party/ctags/read.h
@@ -26,7 +26,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/ctags/sort.c b/third_party/ctags/sort.c
index 64c7c54c9..ff70e1afc 100644
--- a/third_party/ctags/sort.c
+++ b/third_party/ctags/sort.c
@@ -39,7 +39,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/ctags/sql.c b/third_party/ctags/sql.c
index 1593a6a25..150d5c919 100644
--- a/third_party/ctags/sql.c
+++ b/third_party/ctags/sql.c
@@ -22,7 +22,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/ctags/tex.c b/third_party/ctags/tex.c
index 55e8875fe..b41e8f6de 100644
--- a/third_party/ctags/tex.c
+++ b/third_party/ctags/tex.c
@@ -23,7 +23,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/ctags/vim.c b/third_party/ctags/vim.c
index b7b2a6be4..60a632a57 100644
--- a/third_party/ctags/vim.c
+++ b/third_party/ctags/vim.c
@@ -25,7 +25,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/finger/display.c b/third_party/finger/display.c
index f1f48c18e..78faecad4 100644
--- a/third_party/finger/display.c
+++ b/third_party/finger/display.c
@@ -37,7 +37,6 @@
 #include "libc/calls/struct/termios.h"
 #include "libc/calls/struct/winsize.h"
 #include "libc/calls/termios.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/fileno.h"
diff --git a/third_party/finger/finger.c b/third_party/finger/finger.c
index 39c1e0dc8..0972414ae 100644
--- a/third_party/finger/finger.c
+++ b/third_party/finger/finger.c
@@ -37,7 +37,6 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/struct/stat.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/mem/mem.h"
 #include "libc/nt/struct/msg.h"
diff --git a/third_party/finger/lprint.c b/third_party/finger/lprint.c
index 897f9deb2..3a9220028 100644
--- a/third_party/finger/lprint.c
+++ b/third_party/finger/lprint.c
@@ -35,7 +35,6 @@
  */
 #include "libc/calls/calls.h"
 #include "libc/calls/struct/stat.h"
-#include "libc/fmt/fmt.h"
 #include "libc/paths.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
diff --git a/third_party/ggml/ggml.c b/third_party/ggml/ggml.c
index ae5cba95d..80f1b8af5 100644
--- a/third_party/ggml/ggml.c
+++ b/third_party/ggml/ggml.c
@@ -30,7 +30,6 @@
 #include "libc/atomic.h"
 #include "libc/calls/calls.h"
 #include "libc/calls/struct/timespec.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/atomic.h"
 #include "libc/inttypes.h"
 #include "libc/literal.h"
diff --git a/third_party/ggml/llama_util.h b/third_party/ggml/llama_util.h
index c0f6f9746..533b1f26f 100755
--- a/third_party/ggml/llama_util.h
+++ b/third_party/ggml/llama_util.h
@@ -3,7 +3,6 @@
 #define LLAMA_UTIL_H
 #include "libc/calls/struct/rlimit.h"
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
 #include "libc/runtime/sysconf.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/madv.h"
diff --git a/third_party/ggml/main.cc b/third_party/ggml/main.cc
index 969cdb559..37d17d36f 100644
--- a/third_party/ggml/main.cc
+++ b/third_party/ggml/main.cc
@@ -31,7 +31,6 @@
 #include "libc/calls/struct/sched_param.h"
 #include "libc/calls/struct/sigaction.h"
 #include "libc/calls/struct/stat.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/bits.h"
 #include "libc/log/log.h"
 #include "libc/macros.internal.h"
diff --git a/third_party/hiredis/net.c b/third_party/hiredis/net.c
index 79b487ae5..e4309b20e 100644
--- a/third_party/hiredis/net.c
+++ b/third_party/hiredis/net.c
@@ -68,7 +68,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/hiredis/read.h b/third_party/hiredis/read.h
index 2cca2d312..d2010edfc 100644
--- a/third_party/hiredis/read.h
+++ b/third_party/hiredis/read.h
@@ -36,7 +36,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h" /* for size_t */
diff --git a/third_party/hiredis/sds.c b/third_party/hiredis/sds.c
index b2e8bcdcc..8b0036cc6 100644
--- a/third_party/hiredis/sds.c
+++ b/third_party/hiredis/sds.c
@@ -34,7 +34,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
@@ -1145,7 +1144,6 @@ void sds_free(void *ptr) { s_free(ptr); }
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/libcxx/__bsd_locale_fallbacks.h b/third_party/libcxx/__bsd_locale_fallbacks.h
index 6faca54bb..69217accf 100644
--- a/third_party/libcxx/__bsd_locale_fallbacks.h
+++ b/third_party/libcxx/__bsd_locale_fallbacks.h
@@ -15,7 +15,6 @@
 
 #include "third_party/libcxx/stdlib.h"
 #include "libc/str/unicode.h"
-#include "libc/fmt/fmt.h"
 #include "libc/str/locale.h"
 #include "third_party/libcxx/memory"
 #include "third_party/libcxx/__locale"
diff --git a/third_party/libcxx/stdio.h b/third_party/libcxx/stdio.h
index 6169adaf9..c16c2d66e 100644
--- a/third_party/libcxx/stdio.h
+++ b/third_party/libcxx/stdio.h
@@ -102,10 +102,8 @@ void perror(const char* s);
 #pragma GCC system_header
 #endif
 
-#include "libc/fmt/fmt.h"
 #include "libc/calls/calls.h"
 #include "libc/temp.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 
 #ifdef __cplusplus
diff --git a/third_party/lua/lunix.c b/third_party/lua/lunix.c
index c7b85e110..a16b92c1f 100644
--- a/third_party/lua/lunix.c
+++ b/third_party/lua/lunix.c
@@ -43,7 +43,6 @@
 #include "libc/dns/dns.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/fmt/magnumstrs.internal.h"
 #include "libc/intrin/atomic.h"
@@ -53,6 +52,7 @@
 #include "libc/log/log.h"
 #include "libc/macros.internal.h"
 #include "libc/mem/mem.h"
+#include "libc/nt/process.h"
 #include "libc/nt/runtime.h"
 #include "libc/nt/synchronization.h"
 #include "libc/runtime/clktck.h"
@@ -2628,7 +2628,8 @@ static int LuaUnixErrnoToString(lua_State *L) {
   struct UnixErrno *e;
   e = GetUnixErrno(L);
   if (e->call) {
-    strerror_wr(e->errno_, e->winerr, msg, sizeof(msg));
+    if (IsWindows()) SetLastError(e->winerr);
+    strerror_r(e->errno_, msg, sizeof(msg));
     lua_pushfstring(L, "%s() failed: %s", e->call, msg);
   } else {
     lua_pushstring(L, _strerrno(e->errno_));
diff --git a/third_party/lz4cli/util.h b/third_party/lz4cli/util.h
index 3526c91cd..c1997568b 100644
--- a/third_party/lz4cli/util.h
+++ b/third_party/lz4cli/util.h
@@ -38,7 +38,6 @@ extern "C" {
 #include "libc/calls/calls.h"
 #include "libc/time/time.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/time/struct/utimbuf.h"
 #include "libc/calls/struct/stat.h"
 #include "libc/calls/struct/dirent.h"
diff --git a/third_party/make/error.c b/third_party/make/error.c
index a2aac18b8..edcf84228 100644
--- a/third_party/make/error.c
+++ b/third_party/make/error.c
@@ -23,8 +23,6 @@
 #include "third_party/make/config.h"
 #include "third_party/make/error.h"
 #include "libc/stdio/stdio.h"
-#include "libc/fmt/fmt.h"
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 #include "libc/runtime/runtime.h"
 #include "third_party/make/stdio.h"
diff --git a/third_party/make/job.c b/third_party/make/job.c
index 198648209..688393068 100644
--- a/third_party/make/job.c
+++ b/third_party/make/job.c
@@ -35,7 +35,6 @@ this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include "libc/elf/struct/ehdr.h"
 #include "libc/elf/struct/phdr.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/fmt/libgen.h"
 #include "libc/intrin/bits.h"
diff --git a/third_party/make/makeint.inc b/third_party/make/makeint.inc
index d3d9e02a4..e8d9f0a1f 100644
--- a/third_party/make/makeint.inc
+++ b/third_party/make/makeint.inc
@@ -26,7 +26,6 @@ this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include "libc/calls/weirdtypes.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/log/log.h"
 #include "libc/macros.internal.h"
@@ -35,7 +34,6 @@ this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include "libc/mem/mem.h"
 #include "libc/runtime/stack.h"
 #include "libc/stdio/stdio.h"
-#include "libc/temp.h"
 #include "libc/str/locale.h"
 #include "libc/str/str.h"
 #include "libc/sysv/consts/f.h"
@@ -48,6 +46,7 @@ this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include "libc/sysv/consts/sa.h"
 #include "libc/sysv/consts/sicode.h"
 #include "libc/sysv/consts/w.h"
+#include "libc/temp.h"
 #include "libc/time/struct/tm.h"
 #include "libc/time/time.h"
 #include "third_party/gdtoa/gdtoa.h"
diff --git a/third_party/maxmind/maxminddb.c b/third_party/maxmind/maxminddb.c
index c212acd4b..d20fc0f6d 100644
--- a/third_party/maxmind/maxminddb.c
+++ b/third_party/maxmind/maxminddb.c
@@ -22,7 +22,6 @@
 #include "libc/calls/weirdtypes.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/bits.h"
 #include "libc/inttypes.h"
 #include "libc/limits.h"
diff --git a/third_party/mbedtls/error.c b/third_party/mbedtls/error.c
index 21d91c2d3..69a372b35 100644
--- a/third_party/mbedtls/error.c
+++ b/third_party/mbedtls/error.c
@@ -16,7 +16,6 @@
 │ limitations under the License.                                               │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "third_party/mbedtls/error.h"
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 #include "third_party/mbedtls/aes.h"
 #include "third_party/mbedtls/asn1.h"
diff --git a/third_party/mbedtls/oid.c b/third_party/mbedtls/oid.c
index d31d7b9d9..204b40e23 100644
--- a/third_party/mbedtls/oid.c
+++ b/third_party/mbedtls/oid.c
@@ -15,7 +15,6 @@
 │ See the License for the specific language governing permissions and          │
 │ limitations under the License.                                               │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 #include "third_party/mbedtls/common.h"
 #include "third_party/mbedtls/error.h"
diff --git a/third_party/mbedtls/platform.h b/third_party/mbedtls/platform.h
index f2b2cdae9..63ac793df 100644
--- a/third_party/mbedtls/platform.h
+++ b/third_party/mbedtls/platform.h
@@ -2,7 +2,6 @@
 #define COSMOPOLITAN_THIRD_PARTY_MBEDTLS_PLATFORM_H_
 #include "libc/assert.h"
 #include "libc/calls/calls.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/likely.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
diff --git a/third_party/mbedtls/test/lib.c b/third_party/mbedtls/test/lib.c
index 3d11599bd..63b70449c 100644
--- a/third_party/mbedtls/test/lib.c
+++ b/third_party/mbedtls/test/lib.c
@@ -22,7 +22,6 @@
 #include "libc/dce.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/bits.h"
 #include "libc/intrin/describebacktrace.internal.h"
 #include "libc/intrin/safemacros.internal.h"
diff --git a/third_party/mbedtls/x509.c b/third_party/mbedtls/x509.c
index a9e4fa9cc..ff5b99faa 100644
--- a/third_party/mbedtls/x509.c
+++ b/third_party/mbedtls/x509.c
@@ -15,7 +15,6 @@
 │ See the License for the specific language governing permissions and          │
 │ limitations under the License.                                               │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/stdio.h"
 #include "libc/time/struct/tm.h"
diff --git a/third_party/mbedtls/x509_crt.c b/third_party/mbedtls/x509_crt.c
index 26e8e502b..62620e998 100644
--- a/third_party/mbedtls/x509_crt.c
+++ b/third_party/mbedtls/x509_crt.c
@@ -18,7 +18,6 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/struct/dirent.h"
 #include "libc/calls/struct/stat.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/bits.h"
 #include "libc/limits.h"
 #include "libc/log/log.h"
diff --git a/third_party/musl/crypt_sha256.c b/third_party/musl/crypt_sha256.c
index 6777a2084..6e254d270 100644
--- a/third_party/musl/crypt_sha256.c
+++ b/third_party/musl/crypt_sha256.c
@@ -28,7 +28,6 @@
 #include "libc/mem/alg.h"
 #include "libc/calls/calls.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/literal.h"
 #include "libc/mem/mem.h"
diff --git a/third_party/musl/crypt_sha512.c b/third_party/musl/crypt_sha512.c
index 55f4d3078..6d25ccef8 100644
--- a/third_party/musl/crypt_sha512.c
+++ b/third_party/musl/crypt_sha512.c
@@ -28,7 +28,6 @@
 #include "libc/mem/alg.h"
 #include "libc/calls/calls.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/literal.h"
 #include "libc/mem/mem.h"
diff --git a/third_party/musl/mntent.c b/third_party/musl/mntent.c
index 4770c1cf6..271c3c963 100644
--- a/third_party/musl/mntent.c
+++ b/third_party/musl/mntent.c
@@ -27,7 +27,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/calls/calls.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
diff --git a/third_party/python/Lib/test/test_doctest.py b/third_party/python/Lib/test/test_doctest.py
index d20718c4b..8214fa15a 100644
--- a/third_party/python/Lib/test/test_doctest.py
+++ b/third_party/python/Lib/test/test_doctest.py
@@ -2921,7 +2921,7 @@ Invalid file name:
     >>> print(normalize(err))                    # doctest: +ELLIPSIS
     Traceback (most recent call last):
       ...
-    FileNotFoundError: [Errno 2] ENOENT...
+    FileNotFoundError: [Errno 2] No such file or directory...
 
 Invalid doctest option:
 
diff --git a/third_party/python/Modules/_datetimemodule.c b/third_party/python/Modules/_datetimemodule.c
index 7e61bf5b7..d449af4d4 100644
--- a/third_party/python/Modules/_datetimemodule.c
+++ b/third_party/python/Modules/_datetimemodule.c
@@ -6,7 +6,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/math.h"
 #include "libc/time/struct/tm.h"
 #include "third_party/python/Include/abstract.h"
diff --git a/third_party/python/Modules/_decimal/_decimal.c b/third_party/python/Modules/_decimal/_decimal.c
index cab874903..2a6e182b2 100644
--- a/third_party/python/Modules/_decimal/_decimal.c
+++ b/third_party/python/Modules/_decimal/_decimal.c
@@ -27,7 +27,6 @@
 │ OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,            │
 │ EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                           │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "third_party/python/Include/abstract.h"
 #include "third_party/python/Include/boolobject.h"
 #include "third_party/python/Include/complexobject.h"
diff --git a/third_party/python/Modules/_decimal/libmpdec/io.c b/third_party/python/Modules/_decimal/libmpdec/io.c
index 7672c85eb..ee1e5d8e1 100644
--- a/third_party/python/Modules/_decimal/libmpdec/io.c
+++ b/third_party/python/Modules/_decimal/libmpdec/io.c
@@ -28,7 +28,6 @@
 │ EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                           │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/str/locale.h"
 #include "libc/str/unicode.h"
 #include "third_party/python/Modules/_decimal/libmpdec/bits.h"
diff --git a/third_party/python/Modules/_testcapimodule.c b/third_party/python/Modules/_testcapimodule.c
index 1e14beb61..f1ae03586 100644
--- a/third_party/python/Modules/_testcapimodule.c
+++ b/third_party/python/Modules/_testcapimodule.c
@@ -9,7 +9,6 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/math.h"
 #include "libc/mem/mem.h"
diff --git a/third_party/python/Modules/pyexpat.c b/third_party/python/Modules/pyexpat.c
index a3a8dab2d..85628b5d0 100644
--- a/third_party/python/Modules/pyexpat.c
+++ b/third_party/python/Modules/pyexpat.c
@@ -5,7 +5,6 @@
 │ https://docs.python.org/3/license.html                                       │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "third_party/python/Include/pyexpat.h"
-#include "libc/fmt/fmt.h"
 #include "third_party/python/Include/abstract.h"
 #include "third_party/python/Include/boolobject.h"
 #include "third_party/python/Include/bytearrayobject.h"
diff --git a/third_party/python/Modules/unicodedata.c b/third_party/python/Modules/unicodedata.c
index 279c7d273..a380a4f9f 100644
--- a/third_party/python/Modules/unicodedata.c
+++ b/third_party/python/Modules/unicodedata.c
@@ -6,7 +6,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #define PY_SSIZE_T_CLEAN
 #include "third_party/python/Modules/unicodedata.h"
-#include "libc/fmt/fmt.h"
 #include "libc/nexgen32e/kompressor.h"
 #include "third_party/python/Include/floatobject.h"
 #include "third_party/python/Include/import.h"
diff --git a/third_party/python/Modules/unicodedata_getcode.c b/third_party/python/Modules/unicodedata_getcode.c
index 187de8ee7..31adedc68 100644
--- a/third_party/python/Modules/unicodedata_getcode.c
+++ b/third_party/python/Modules/unicodedata_getcode.c
@@ -4,7 +4,6 @@
 │ Python 3                                                                     │
 │ https://docs.python.org/3/license.html                                       │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "third_party/python/Include/pyctype.h"
 #include "third_party/python/Include/pyerrors.h"
 #include "third_party/python/Include/pymacro.h"
diff --git a/third_party/python/Objects/bytesobject.c b/third_party/python/Objects/bytesobject.c
index 38bdbbbc6..32a76d996 100644
--- a/third_party/python/Objects/bytesobject.c
+++ b/third_party/python/Objects/bytesobject.c
@@ -6,7 +6,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #define PY_SSIZE_T_CLEAN
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "third_party/python/Include/abstract.h"
 #include "third_party/python/Include/boolobject.h"
 #include "third_party/python/Include/bytearrayobject.h"
diff --git a/third_party/python/Objects/obmalloc.c b/third_party/python/Objects/obmalloc.c
index e9166b5b8..a473d65c4 100644
--- a/third_party/python/Objects/obmalloc.c
+++ b/third_party/python/Objects/obmalloc.c
@@ -7,7 +7,6 @@
 #include "libc/assert.h"
 #include "libc/calls/calls.h"
 #include "libc/dce.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/asan.internal.h"
 #include "libc/intrin/bits.h"
 #include "libc/mem/mem.h"
diff --git a/third_party/python/Objects/typeobject.c b/third_party/python/Objects/typeobject.c
index 7b3603f41..f3231c164 100644
--- a/third_party/python/Objects/typeobject.c
+++ b/third_party/python/Objects/typeobject.c
@@ -6,7 +6,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
 #include "libc/intrin/likely.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/countbranch.h"
 #include "third_party/python/Include/abstract.h"
 #include "third_party/python/Include/boolobject.h"
diff --git a/third_party/python/Objects/unicodeobject.c b/third_party/python/Objects/unicodeobject.c
index 7731b97c7..a784133d1 100644
--- a/third_party/python/Objects/unicodeobject.c
+++ b/third_party/python/Objects/unicodeobject.c
@@ -8,7 +8,6 @@
 #include "third_party/python/Include/unicodeobject.h"
 #include "libc/assert.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/likely.h"
 #include "libc/intrin/weaken.h"
 #include "libc/log/countbranch.h"
diff --git a/third_party/python/Python/ast.c b/third_party/python/Python/ast.c
index 303328153..df287cd85 100644
--- a/third_party/python/Python/ast.c
+++ b/third_party/python/Python/ast.c
@@ -7,7 +7,6 @@
 #include "third_party/python/Include/ast.h"
 #include "libc/assert.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "third_party/python/Include/Python-ast.h"
 #include "third_party/python/Include/abstract.h"
 #include "third_party/python/Include/boolobject.h"
diff --git a/third_party/python/Python/mysnprintf.c b/third_party/python/Python/mysnprintf.c
index 9dcc8fb62..58c6f2df4 100644
--- a/third_party/python/Python/mysnprintf.c
+++ b/third_party/python/Python/mysnprintf.c
@@ -5,7 +5,6 @@
 │ https://docs.python.org/3/license.html                                       │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "third_party/python/Include/pyerrors.h"
 /* clang-format off */
 
diff --git a/third_party/python/Python/pystrtod.c b/third_party/python/Python/pystrtod.c
index 3038fdf6a..9071fd3e9 100644
--- a/third_party/python/Python/pystrtod.c
+++ b/third_party/python/Python/pystrtod.c
@@ -6,7 +6,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/str/locale.h"
 #include "third_party/python/Include/dtoa.h"
 #include "third_party/python/Include/object.h"
diff --git a/third_party/quickjs/atom.c b/third_party/quickjs/atom.c
index 0eaad8979..d5ffafb63 100644
--- a/third_party/quickjs/atom.c
+++ b/third_party/quickjs/atom.c
@@ -23,7 +23,6 @@
  * THE SOFTWARE.
  */
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 #include "third_party/quickjs/internal.h"
 #include "third_party/quickjs/libregexp.h"
diff --git a/third_party/quickjs/cutils.c b/third_party/quickjs/cutils.c
index 7d2483381..c4044bb99 100644
--- a/third_party/quickjs/cutils.c
+++ b/third_party/quickjs/cutils.c
@@ -22,7 +22,6 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/str/str.h"
 #include "third_party/quickjs/cutils.h"
diff --git a/third_party/quickjs/date.c b/third_party/quickjs/date.c
index a5b0716df..58700a170 100644
--- a/third_party/quickjs/date.c
+++ b/third_party/quickjs/date.c
@@ -24,7 +24,6 @@
  */
 #include "libc/calls/struct/timeval.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/time/struct/tm.h"
 #include "libc/time/time.h"
 #include "third_party/quickjs/internal.h"
diff --git a/third_party/quickjs/dbuf.c b/third_party/quickjs/dbuf.c
index f57502827..ede819ab0 100644
--- a/third_party/quickjs/dbuf.c
+++ b/third_party/quickjs/dbuf.c
@@ -22,7 +22,6 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/str/str.h"
 #include "third_party/quickjs/internal.h"
diff --git a/third_party/quickjs/err.c b/third_party/quickjs/err.c
index 57cda4e96..8a4507a67 100644
--- a/third_party/quickjs/err.c
+++ b/third_party/quickjs/err.c
@@ -22,7 +22,6 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-#include "libc/fmt/fmt.h"
 #include "third_party/quickjs/internal.h"
 #include "third_party/quickjs/leb128.h"
 #include "third_party/quickjs/libregexp.h"
diff --git a/third_party/quickjs/json.c b/third_party/quickjs/json.c
index dfceceaf2..87ad290a7 100644
--- a/third_party/quickjs/json.c
+++ b/third_party/quickjs/json.c
@@ -23,7 +23,6 @@
  * THE SOFTWARE.
  */
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 #include "third_party/quickjs/internal.h"
 #include "third_party/quickjs/libregexp.h"
diff --git a/third_party/quickjs/libregexp.c b/third_party/quickjs/libregexp.c
index b390548e1..54475c52c 100644
--- a/third_party/quickjs/libregexp.c
+++ b/third_party/quickjs/libregexp.c
@@ -23,7 +23,6 @@
  */
 #include "libc/assert.h"
 #include "libc/intrin/likely.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/mem/alloca.h"
 #include "libc/runtime/runtime.h"
diff --git a/third_party/quickjs/parse.c b/third_party/quickjs/parse.c
index 4532fc754..13e9929d2 100644
--- a/third_party/quickjs/parse.c
+++ b/third_party/quickjs/parse.c
@@ -23,7 +23,6 @@
  * THE SOFTWARE.
  */
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "libc/runtime/runtime.h"
 #include "libc/str/str.h"
 #include "third_party/quickjs/internal.h"
diff --git a/third_party/quickjs/qjsc.c b/third_party/quickjs/qjsc.c
index d2dc01070..b6fbb7b10 100644
--- a/third_party/quickjs/qjsc.c
+++ b/third_party/quickjs/qjsc.c
@@ -25,7 +25,6 @@
 #include "libc/calls/calls.h"
 #include "libc/dce.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/mem/gc.h"
 #include "libc/mem/mem.h"
diff --git a/third_party/quickjs/quickjs-libc.c b/third_party/quickjs/quickjs-libc.c
index fc30f9584..c1e43fa47 100644
--- a/third_party/quickjs/quickjs-libc.c
+++ b/third_party/quickjs/quickjs-libc.c
@@ -33,7 +33,6 @@
 #include "libc/calls/termios.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/mem/mem.h"
 #include "libc/nt/synchronization.h"
diff --git a/third_party/quickjs/quickjs.c b/third_party/quickjs/quickjs.c
index 97e26f409..1ecabea6e 100644
--- a/third_party/quickjs/quickjs.c
+++ b/third_party/quickjs/quickjs.c
@@ -27,8 +27,6 @@
 #include "third_party/quickjs/list.h"
 #include "third_party/quickjs/quickjs.h"
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
-#include "libc/fmt/fmt.h"
 #include "libc/inttypes.h"
 #include "libc/mem/alloca.h"
 #include "third_party/gdtoa/gdtoa.h"
diff --git a/third_party/quickjs/run-test262.c b/third_party/quickjs/run-test262.c
index 3d453ec6e..1d01d2585 100644
--- a/third_party/quickjs/run-test262.c
+++ b/third_party/quickjs/run-test262.c
@@ -26,7 +26,6 @@
 #include "libc/calls/struct/stat.h"
 #include "libc/calls/weirdtypes.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/mem/alg.h"
 #include "libc/mem/mem.h"
diff --git a/third_party/quickjs/str.c b/third_party/quickjs/str.c
index d658d4eb1..542f629cf 100644
--- a/third_party/quickjs/str.c
+++ b/third_party/quickjs/str.c
@@ -25,7 +25,6 @@
 #include "libc/str/str.h"
 #include "libc/assert.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/runtime/fenv.h"
 #include "third_party/gdtoa/gdtoa.h"
 #include "third_party/quickjs/internal.h"
diff --git a/third_party/quickjs/unicode_gen.c b/third_party/quickjs/unicode_gen.c
index 6d0b4a37c..47aa908ec 100644
--- a/third_party/quickjs/unicode_gen.c
+++ b/third_party/quickjs/unicode_gen.c
@@ -24,7 +24,6 @@
  */
 #include "libc/assert.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/mem/alg.h"
 #include "libc/mem/mem.h"
diff --git a/third_party/sed/compile.c b/third_party/sed/compile.c
index bddc8d870..7cf416571 100644
--- a/third_party/sed/compile.c
+++ b/third_party/sed/compile.c
@@ -62,7 +62,6 @@
 #include "libc/sysv/consts/_posix.h"
 #include "third_party/regex/regex.h"
 #include "libc/calls/calls.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "libc/mem/alg.h"
diff --git a/third_party/sed/main.c b/third_party/sed/main.c
index 39a132136..f500969fc 100644
--- a/third_party/sed/main.c
+++ b/third_party/sed/main.c
@@ -35,7 +35,6 @@
 #include "libc/calls/calls.h"
 #include "libc/calls/struct/stat.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/libgen.h"
 #include "libc/log/bsd.h"
 #include "libc/runtime/runtime.h"
diff --git a/third_party/sqlite3/shell.c b/third_party/sqlite3/shell.c
index 670e17fae..8bed834c1 100644
--- a/third_party/sqlite3/shell.c
+++ b/third_party/sqlite3/shell.c
@@ -117,7 +117,6 @@ typedef unsigned short int u16;
 
 #include "libc/assert.h"
 #include "libc/errno.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/conv.h"
 #include "libc/mem/mem.h"
 #include "libc/str/str.h"
diff --git a/third_party/stb/stb_image_write.c b/third_party/stb/stb_image_write.c
index 000ebe7c4..63187511d 100644
--- a/third_party/stb/stb_image_write.c
+++ b/third_party/stb/stb_image_write.c
@@ -122,7 +122,6 @@
 #include "dsp/core/core.h"
 #include "libc/assert.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/macros.internal.h"
 #include "libc/math.h"
diff --git a/third_party/tidy/attrs.c b/third_party/tidy/attrs.c
index c6d90ea9b..576fba320 100644
--- a/third_party/tidy/attrs.c
+++ b/third_party/tidy/attrs.c
@@ -11,7 +11,6 @@
 #include "third_party/tidy/message.h"
 #include "third_party/tidy/tmbstr.h"
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "third_party/tidy/utf8.h"
 
 #if __GNUC__ >= 11 /* [jart] this one looks legit */
diff --git a/third_party/tidy/entities.c b/third_party/tidy/entities.c
index 0f96ab44c..bec420ea0 100644
--- a/third_party/tidy/entities.c
+++ b/third_party/tidy/entities.c
@@ -13,7 +13,6 @@
 #include "third_party/tidy/entities.h"
 #include "third_party/tidy/tidy-int.h"
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "third_party/tidy/tmbstr.h"
 
 struct _entity;
diff --git a/third_party/tidy/lexer.c b/third_party/tidy/lexer.c
index 1d5143918..821a530df 100644
--- a/third_party/tidy/lexer.c
+++ b/third_party/tidy/lexer.c
@@ -41,7 +41,6 @@
 #include "third_party/tidy/utf8.h"
 #include "third_party/tidy/streamio.h"
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "third_party/tidy/sprtf.h"
 
 #if defined(ENABLE_DEBUG_LOG)
diff --git a/third_party/tidy/tidy.c b/third_party/tidy/tidy.c
index d445a90ec..f241aae6a 100644
--- a/third_party/tidy/tidy.c
+++ b/third_party/tidy/tidy.c
@@ -23,7 +23,6 @@
 #include "third_party/tidy/tidy.h"
 #include "third_party/tidy/tidybuffio.h"
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "libc/mem/alg.h"
 #include "libc/str/str.h"
 #include "libc/runtime/runtime.h"
diff --git a/third_party/tidy/tmbstr.c b/third_party/tidy/tmbstr.c
index bc5565c67..24ea7eb3f 100644
--- a/third_party/tidy/tmbstr.c
+++ b/third_party/tidy/tmbstr.c
@@ -8,7 +8,6 @@
 
 #include "third_party/tidy/forward.h"
 #include "third_party/tidy/tmbstr.h"
-#include "libc/fmt/fmt.h"
 #include "third_party/tidy/lexer.h"
 
 /* like strdup but using an allocator */
diff --git a/third_party/unzip/unzpriv.h b/third_party/unzip/unzpriv.h
index 4cbc79356..2d16250a4 100644
--- a/third_party/unzip/unzpriv.h
+++ b/third_party/unzip/unzpriv.h
@@ -30,7 +30,6 @@
 #include "libc/errno.h"
 #include "third_party/unzip/unzpriv.h"
 #include "libc/calls/calls.h"
-#include "libc/fmt/fmt.h"
 #include "third_party/zip/crypt.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
diff --git a/third_party/xxhash/cli/xsum_os_specific.c b/third_party/xxhash/cli/xsum_os_specific.c
index 567c6151f..767545184 100644
--- a/third_party/xxhash/cli/xsum_os_specific.c
+++ b/third_party/xxhash/cli/xsum_os_specific.c
@@ -91,7 +91,6 @@
 #include "libc/nt/winsock.h" /* DeviceIoControl, HANDLE, FSCTL_SET_SPARSE */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/xxhash/cli/xsum_os_specific.h b/third_party/xxhash/cli/xsum_os_specific.h
index 902e38abf..e03aded7d 100644
--- a/third_party/xxhash/cli/xsum_os_specific.h
+++ b/third_party/xxhash/cli/xsum_os_specific.h
@@ -30,7 +30,6 @@
 #include "third_party/xxhash/cli/xsum_config.h"
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/xxhash/tests/bench/benchfn.c b/third_party/xxhash/tests/bench/benchfn.c
index 0965e3a89..ea13ef6d0 100644
--- a/third_party/xxhash/tests/bench/benchfn.c
+++ b/third_party/xxhash/tests/bench/benchfn.c
@@ -56,7 +56,6 @@
 #if defined(DEBUG) && (DEBUG >= 1)
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/xxhash/tests/bench/bhDisplay.c b/third_party/xxhash/tests/bench/bhDisplay.c
index cc85643ed..8d244aea0 100644
--- a/third_party/xxhash/tests/bench/bhDisplay.c
+++ b/third_party/xxhash/tests/bench/bhDisplay.c
@@ -45,7 +45,6 @@
 #include "third_party/musl/rand48.h"   /* rand */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/xxhash/tests/bench/main.c b/third_party/xxhash/tests/bench/main.c
index a468e1b88..04128291c 100644
--- a/third_party/xxhash/tests/bench/main.c
+++ b/third_party/xxhash/tests/bench/main.c
@@ -29,7 +29,6 @@
 
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/xxhash/tests/bench/timefn.c b/third_party/xxhash/tests/bench/timefn.c
index 82fb05a80..fa7158a9a 100644
--- a/third_party/xxhash/tests/bench/timefn.c
+++ b/third_party/xxhash/tests/bench/timefn.c
@@ -38,7 +38,6 @@
 #include "third_party/musl/rand48.h"   /* abort */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
@@ -125,7 +124,6 @@ PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd)
 #include "third_party/musl/rand48.h"   /* abort */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/xxhash/tests/collisions/main.c b/third_party/xxhash/tests/collisions/main.c
index 6f151364b..4cbfa75e1 100644
--- a/third_party/xxhash/tests/collisions/main.c
+++ b/third_party/xxhash/tests/collisions/main.c
@@ -65,7 +65,6 @@
 #include "libc/str/str.h"   /* memset */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/xxhash/tests/collisions/threading.h b/third_party/xxhash/tests/collisions/threading.h
index d984357db..90f849bfb 100644
--- a/third_party/xxhash/tests/collisions/threading.h
+++ b/third_party/xxhash/tests/collisions/threading.h
@@ -63,7 +63,6 @@ extern "C" {
 #include "libc/nt/winsock.h"
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/xxhash/tests/generate_unicode_test.c b/third_party/xxhash/tests/generate_unicode_test.c
index 3476be2d2..fb25de935 100644
--- a/third_party/xxhash/tests/generate_unicode_test.c
+++ b/third_party/xxhash/tests/generate_unicode_test.c
@@ -42,7 +42,6 @@
 #define _CRT_SECURE_NO_WARNINGS /* Silence warnings on MSVC */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/xxhash/tests/multiInclude.c b/third_party/xxhash/tests/multiInclude.c
index dd875fc66..bf15cf353 100644
--- a/third_party/xxhash/tests/multiInclude.c
+++ b/third_party/xxhash/tests/multiInclude.c
@@ -28,7 +28,6 @@
 
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/xxhash/xxh_x86dispatch.c b/third_party/xxhash/xxh_x86dispatch.c
index a349ca63c..04fc36c7c 100644
--- a/third_party/xxhash/xxh_x86dispatch.c
+++ b/third_party/xxhash/xxh_x86dispatch.c
@@ -200,7 +200,6 @@ extern "C" {
 /* debug logging */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/xxhash/xxhash.h b/third_party/xxhash/xxhash.h
index 15e5c7a0c..5351be459 100644
--- a/third_party/xxhash/xxhash.h
+++ b/third_party/xxhash/xxhash.h
@@ -144,7 +144,6 @@
  * @code{.c}
  *   #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
@@ -1360,7 +1359,6 @@ XXH_PUBLIC_API XXH_PUREF XXH128_hash_t XXH128(XXH_NOESCAPE const void* data, siz
  * @code{.c}
  *    #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zip/tailor.h b/third_party/zip/tailor.h
index 604f07bbe..73a6c79b4 100644
--- a/third_party/zip/tailor.h
+++ b/third_party/zip/tailor.h
@@ -223,7 +223,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/zip/zip.c b/third_party/zip/zip.c
index eb349a993..3b66255de 100644
--- a/third_party/zip/zip.c
+++ b/third_party/zip/zip.c
@@ -88,7 +88,6 @@
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/zlib/inflate.c b/third_party/zlib/inflate.c
index 2cec2b3bc..c809f60eb 100644
--- a/third_party/zlib/inflate.c
+++ b/third_party/zlib/inflate.c
@@ -330,7 +330,6 @@ struct inflate_state FAR *state;
 #include "libc/calls/calls.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "third_party/musl/tempnam.h"
diff --git a/third_party/zlib/trees.c b/third_party/zlib/trees.c
index 84564458b..5ba990198 100644
--- a/third_party/zlib/trees.c
+++ b/third_party/zlib/trees.c
@@ -7,7 +7,6 @@
  * For conditions of distribution and use, see copyright notice in zlib.h
  */
 #include "libc/calls/calls.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
 #include "libc/str/str.h"
diff --git a/third_party/zstd/lib/common/xxhash.h b/third_party/zstd/lib/common/xxhash.h
index b7894a9e2..f31e8b3aa 100644
--- a/third_party/zstd/lib/common/xxhash.h
+++ b/third_party/zstd/lib/common/xxhash.h
@@ -437,7 +437,6 @@ XXH_PUBLIC_API XXH32_hash_t XXH32 (const void* input, size_t length, XXH32_hash_
  * @code{.c}
  *    #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/lib/common/zstd_deps.h b/third_party/zstd/lib/common/zstd_deps.h
index b27353306..bde8505f4 100644
--- a/third_party/zstd/lib/common/zstd_deps.h
+++ b/third_party/zstd/lib/common/zstd_deps.h
@@ -115,7 +115,6 @@
 
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/lib/compress/zstdmt_compress.c b/third_party/zstd/lib/compress/zstdmt_compress.c
index 20907af27..51632d108 100644
--- a/third_party/zstd/lib/compress/zstdmt_compress.c
+++ b/third_party/zstd/lib/compress/zstdmt_compress.c
@@ -43,7 +43,6 @@
 
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/lib/dictBuilder/cover.c b/third_party/zstd/lib/dictBuilder/cover.c
index ddd966723..43582c85a 100644
--- a/third_party/zstd/lib/dictBuilder/cover.c
+++ b/third_party/zstd/lib/dictBuilder/cover.c
@@ -24,7 +24,6 @@
 ***************************************/
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/lib/dictBuilder/cover.h b/third_party/zstd/lib/dictBuilder/cover.h
index 0a620442b..512d216c7 100644
--- a/third_party/zstd/lib/dictBuilder/cover.h
+++ b/third_party/zstd/lib/dictBuilder/cover.h
@@ -15,7 +15,6 @@
 
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/lib/dictBuilder/divsufsort.c b/third_party/zstd/lib/dictBuilder/divsufsort.c
index 1f87fe606..390f1a5fd 100644
--- a/third_party/zstd/lib/dictBuilder/divsufsort.c
+++ b/third_party/zstd/lib/dictBuilder/divsufsort.c
@@ -40,7 +40,6 @@
 #include "libc/assert.h"
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/lib/dictBuilder/fastcover.c b/third_party/zstd/lib/dictBuilder/fastcover.c
index c4c8860b5..1d29d1f56 100644
--- a/third_party/zstd/lib/dictBuilder/fastcover.c
+++ b/third_party/zstd/lib/dictBuilder/fastcover.c
@@ -14,7 +14,6 @@
 ***************************************/
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/lib/dictBuilder/zdict.c b/third_party/zstd/lib/dictBuilder/zdict.c
index 314f1d435..68a2e9eda 100644
--- a/third_party/zstd/lib/dictBuilder/zdict.c
+++ b/third_party/zstd/lib/dictBuilder/zdict.c
@@ -57,7 +57,6 @@
 #include "libc/str/str.h"        /* memset */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/programs/benchfn.c b/third_party/zstd/programs/benchfn.c
index 66fe542ac..2e39df3fa 100644
--- a/third_party/zstd/programs/benchfn.c
+++ b/third_party/zstd/programs/benchfn.c
@@ -55,7 +55,6 @@
 #if defined(DEBUG) && (DEBUG >= 1)
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/programs/benchzstd.c b/third_party/zstd/programs/benchzstd.c
index dab5f1643..d40f94cb8 100644
--- a/third_party/zstd/programs/benchzstd.c
+++ b/third_party/zstd/programs/benchzstd.c
@@ -43,7 +43,6 @@
 #include "libc/str/str.h"      /* memset, strerror */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/programs/datagen.c b/third_party/zstd/programs/datagen.c
index e3351a214..a8aac7a38 100644
--- a/third_party/zstd/programs/datagen.c
+++ b/third_party/zstd/programs/datagen.c
@@ -33,7 +33,6 @@
 #include "third_party/musl/rand48.h"    /* malloc, free */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/programs/dibio.c b/third_party/zstd/programs/dibio.c
index bec85476b..1adf66b41 100644
--- a/third_party/zstd/programs/dibio.c
+++ b/third_party/zstd/programs/dibio.c
@@ -45,7 +45,6 @@
 #include "libc/str/str.h"         /* memset */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/programs/fileio.c b/third_party/zstd/programs/fileio.c
index c01177392..dc47ad54a 100644
--- a/third_party/zstd/programs/fileio.c
+++ b/third_party/zstd/programs/fileio.c
@@ -28,7 +28,6 @@
 #include "third_party/zstd/programs/util.h"       /* UTIL_getFileSize, UTIL_isRegularFile, UTIL_isSameFile */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/programs/fileio_asyncio.c b/third_party/zstd/programs/fileio_asyncio.c
index 542a7666a..5296c6948 100644
--- a/third_party/zstd/programs/fileio_asyncio.c
+++ b/third_party/zstd/programs/fileio_asyncio.c
@@ -12,7 +12,6 @@
 #include "third_party/zstd/programs/platform.h"
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/programs/platform.h b/third_party/zstd/programs/platform.h
index 94c21ad66..3a570034e 100644
--- a/third_party/zstd/programs/platform.h
+++ b/third_party/zstd/programs/platform.h
@@ -186,7 +186,6 @@ extern "C" {
 #include "third_party/musl/lockf.h"   /* isatty */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
@@ -218,7 +217,6 @@ extern "C" {
 #include "libc/nt/winsock.h" /* DeviceIoControl, HANDLE, FSCTL_SET_SPARSE */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/programs/timefn.c b/third_party/zstd/programs/timefn.c
index d50b0535e..b64c53750 100644
--- a/third_party/zstd/programs/timefn.c
+++ b/third_party/zstd/programs/timefn.c
@@ -66,7 +66,6 @@
 #include "third_party/musl/rand48.h"   /* abort */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
@@ -131,7 +130,6 @@ UTIL_time_t UTIL_getTime(void)
 #include "third_party/musl/rand48.h"   /* abort */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
@@ -179,7 +177,6 @@ UTIL_time_t UTIL_getTime(void)
 #include "third_party/musl/rand48.h"   /* abort */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/programs/util.c b/third_party/zstd/programs/util.c
index 04e070d7b..a77944505 100644
--- a/third_party/zstd/programs/util.c
+++ b/third_party/zstd/programs/util.c
@@ -35,7 +35,6 @@ extern "C" {
 #include "third_party/musl/rand48.h"     /* malloc, realloc, free */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/programs/zstdcli.c b/third_party/zstd/programs/zstdcli.c
index 7fe0ae8ea..e6dbfd095 100644
--- a/third_party/zstd/programs/zstdcli.c
+++ b/third_party/zstd/programs/zstdcli.c
@@ -50,7 +50,6 @@
 #include "libc/str/str.h"   /* strcmp, strlen */
 #include "libc/calls/calls.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/third_party/zstd/programs/zstdcli_trace.c b/third_party/zstd/programs/zstdcli_trace.c
index 62fc924d2..ec9ccfb41 100644
--- a/third_party/zstd/programs/zstdcli_trace.c
+++ b/third_party/zstd/programs/zstdcli_trace.c
@@ -14,7 +14,6 @@
 #include "libc/calls/calls.h"
 #include "libc/assert.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/dprintf.h"
 #include "libc/stdio/stdio.h"
 #include "libc/temp.h"
diff --git a/tool/build/cp.c b/tool/build/cp.c
index eb09fb4ba..f1b99d8c2 100644
--- a/tool/build/cp.c
+++ b/tool/build/cp.c
@@ -20,7 +20,6 @@
 #include "libc/calls/struct/stat.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/libgen.h"
 #include "libc/fmt/magnumstrs.internal.h"
 #include "libc/limits.h"
diff --git a/tool/build/killall.c b/tool/build/killall.c
index 1d5f9ea8a..f33493085 100644
--- a/tool/build/killall.c
+++ b/tool/build/killall.c
@@ -176,7 +176,7 @@ int main(int argc, char *argv[]) {
     // get pids of all processes on system
     uint32_t n;
     if (!EnumProcesses(pids, sizeof(pids), &n)) {
-      fprintf(stderr, "%s: EnumProcesses() failed: %s\n", prog,
+      fprintf(stderr, "%s: EnumProcesses() failed: %hs\n", prog,
               DescribeError(GetLastError()));
       exit(1);
     }
diff --git a/tool/build/mv.c b/tool/build/mv.c
index 300b7d3ac..d361b5f8d 100644
--- a/tool/build/mv.c
+++ b/tool/build/mv.c
@@ -20,7 +20,6 @@
 #include "libc/calls/struct/stat.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/libgen.h"
 #include "libc/fmt/magnumstrs.internal.h"
 #include "libc/limits.h"
diff --git a/tool/build/pledge.c b/tool/build/pledge.c
index 05c90eee1..58f0968f7 100644
--- a/tool/build/pledge.c
+++ b/tool/build/pledge.c
@@ -73,7 +73,6 @@
 //     test/tool/build/pledge_test.sh
 //
 
-__static_yoink("strerror_wr");
 __static_yoink("zipos");
 
 #define USAGE \
diff --git a/tool/decode/lib/asmcodegen.c b/tool/decode/lib/asmcodegen.c
index 67120c539..5d92c910f 100644
--- a/tool/decode/lib/asmcodegen.c
+++ b/tool/decode/lib/asmcodegen.c
@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "tool/decode/lib/asmcodegen.h"
-#include "libc/fmt/fmt.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/mem/gc.internal.h"
 #include "libc/mem/mem.h"
diff --git a/tool/decode/lib/titlegen.c b/tool/decode/lib/titlegen.c
index f26807596..fe266904e 100644
--- a/tool/decode/lib/titlegen.c
+++ b/tool/decode/lib/titlegen.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "tool/decode/lib/titlegen.h"
diff --git a/tool/viz/basicidea.c b/tool/viz/basicidea.c
index c983db860..2b5063ff8 100644
--- a/tool/viz/basicidea.c
+++ b/tool/viz/basicidea.c
@@ -21,7 +21,6 @@
 #include "libc/calls/struct/stat.h"
 #include "libc/calls/struct/winsize.h"
 #include "libc/calls/termios.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/macros.internal.h"
 #include "libc/mem/mem.h"
diff --git a/tool/viz/derasterize.c b/tool/viz/derasterize.c
index 4326117c5..48bf9e6e5 100644
--- a/tool/viz/derasterize.c
+++ b/tool/viz/derasterize.c
@@ -22,7 +22,6 @@
 #include "libc/calls/struct/stat.h"
 #include "libc/calls/termios.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/log/check.h"
 #include "libc/log/log.h"
diff --git a/tool/viz/dumphexc.c b/tool/viz/dumphexc.c
index 7e429b7a6..948d1e85f 100644
--- a/tool/viz/dumphexc.c
+++ b/tool/viz/dumphexc.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/macros.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/append.h"
diff --git a/tool/viz/life.c b/tool/viz/life.c
index cad2edbdb..b08ed50dd 100644
--- a/tool/viz/life.c
+++ b/tool/viz/life.c
@@ -24,7 +24,6 @@
 #include "libc/calls/termios.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/intrin/popcnt.h"
 #include "libc/intrin/safemacros.internal.h"
diff --git a/tool/viz/od16.c b/tool/viz/od16.c
index c5effae93..938a1a062 100644
--- a/tool/viz/od16.c
+++ b/tool/viz/od16.c
@@ -18,7 +18,6 @@
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/check.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/runtime.h"
diff --git a/tool/viz/printdos2errno.c b/tool/viz/printdos2errno.c
index 6586fbcb3..c0661ed1d 100644
--- a/tool/viz/printdos2errno.c
+++ b/tool/viz/printdos2errno.c
@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/magnumstrs.internal.h"
 #include "libc/intrin/dos2errno.internal.h"
 #include "libc/intrin/kprintf.h"
diff --git a/tool/viz/printvideo.c b/tool/viz/printvideo.c
index 87088649b..d72b5a767 100644
--- a/tool/viz/printvideo.c
+++ b/tool/viz/printvideo.c
@@ -41,7 +41,6 @@
 #include "libc/dns/dns.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/fmt/itoa.h"
 #include "libc/intrin/bits.h"
 #include "libc/intrin/kprintf.h"