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cd78cbac86
This copies the logic from GLib discussed there: https://gitlab.gnome.org/GNOME/glib/-/merge_requests/2936 Beside being simpler, it also fix all public symbols being annotated with dllexport when doing a static build, as discovered there: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3540#note_1678335 Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3567>
193 lines
6.3 KiB
C
193 lines
6.3 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2004,2005 Wim Taymans <wim@fluendo.com>
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*
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* gstconfig.h: GST_DISABLE_* macros for build configuration
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gstconfig
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* @short_description: Build configuration options
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*
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* This describes the configuration options for GStreamer. When building
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* GStreamer there are a lot of parts (known internally as "subsystems" ) that
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* can be disabled for various reasons. The most common reasons are speed and
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* size, which is important because GStreamer is designed to run on embedded
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* systems.
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*
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* If a subsystem is disabled, most of this changes are done in an API
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* compatible way, so you don't need to adapt your code in most cases. It is
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* never done in an ABI compatible way though. So if you want to disable a
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* subsystem, you have to rebuild all programs depending on GStreamer, too.
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*
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* If a subsystem is disabled in GStreamer, a value is defined in
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* <gst/gst.h>. You can check this if you do subsystem-specific stuff.
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*
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* ``` C
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* #ifndef GST_DISABLE_GST_DEBUG
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* // do stuff specific to the debugging subsystem
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* #endif // GST_DISABLE_GST_DEBUG
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* ```
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*/
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#ifndef __GST_CONFIG_H__
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#define __GST_CONFIG_H__
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/* trick gtk-doc into believing these symbols are defined (yes, it's ugly) */
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#if 0
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#define GST_DISABLE_GST_DEBUG 1
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#define GST_DISABLE_PARSE 1
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#define GST_DISABLE_REGISTRY 1
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#define GST_DISABLE_PLUGIN 1
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#endif
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/***** default padding of structures *****/
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#define GST_PADDING 4
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#define GST_PADDING_INIT { NULL }
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/***** padding for very extensible base classes *****/
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#define GST_PADDING_LARGE 20
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/***** disabling of subsystems *****/
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/**
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* GST_DISABLE_GST_DEBUG:
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*
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* Configures the inclusion of the debugging subsystem
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*/
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@GST_DISABLE_GST_DEBUG_DEFINE@
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/**
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* GST_DISABLE_PARSE:
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*
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* Configures the inclusion of the gst-launch parser
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*/
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@GST_DISABLE_PARSE_DEFINE@
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/**
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* GST_DISABLE_REGISTRY:
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*
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* Configures the use of the plugin registry.
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* If one disables this, required plugins need to be loaded and registered
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* manually
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*/
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@GST_DISABLE_REGISTRY_DEFINE@
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/**
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* GST_DISABLE_CAST_CHECKS:
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*
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* Disable run-time GObject cast checks
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*/
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#define GST_DISABLE_CAST_CHECKS @GST_DISABLE_CAST_CHECKS_DEFINE@
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/**
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* GST_DISABLE_GLIB_ASSERTS:
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*
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* Disable GLib assertion
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*/
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#define GST_DISABLE_GLIB_ASSERTS @GST_DISABLE_GLIB_ASSERTS_DEFINE@
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/**
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* GST_DISABLE_GLIB_CHECKS:
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*
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* Disable GLib checks such as API guards
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*/
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#define GST_DISABLE_GLIB_CHECKS @GST_DISABLE_GLIB_CHECKS_DEFINE@
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/* FIXME: test and document these! */
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/* Configures the use of external plugins */
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@GST_DISABLE_PLUGIN_DEFINE@
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/* Whether or not the CPU supports unaligned access
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* The macros used are defined consistently by GCC, Clang, MSVC, Sun, and ICC
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*
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* References:
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* https://sourceforge.net/p/predef/wiki/Architectures/
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* https://msdn.microsoft.com/en-us/library/b0084kay.aspx
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* http://docs.oracle.com/cd/E19205-01/820-4155/c++_faq.html#Vers6
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* https://software.intel.com/en-us/node/583402
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*/
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#if defined(__alpha__) || defined(__arc__) || defined(__arm__) || defined(__aarch64__) || defined(__bfin) || defined(__hppa__) || defined(__nios2__) || defined(__MICROBLAZE__) || defined(__mips__) || defined(__or1k__) || defined(__sh__) || defined(__SH4__) || defined(__sparc__) || defined(__sparc) || defined(__ia64__) || defined(_M_ALPHA) || defined(_M_ARM) || defined(_M_ARM64) || defined(_M_IA64) || defined(__xtensa__) || defined(__e2k__) || defined(__riscv) || defined(__ARC64__) || defined(__loongarch__)
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# define GST_HAVE_UNALIGNED_ACCESS 0
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#elif defined(__i386__) || defined(__i386) || defined(__amd64__) || defined(__amd64) || defined(__x86_64__) || defined(__ppc__) || defined(__ppc64__) || defined(__powerpc__) || defined(__powerpc64__) || defined(__m68k__) || defined(_M_IX86) || defined(_M_AMD64) || defined(_M_X64) || defined(__s390__) || defined(__s390x__) || defined(__zarch__)
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# define GST_HAVE_UNALIGNED_ACCESS 1
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#else
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# error "Could not detect architecture; don't know whether it supports unaligned access! Please file a bug."
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#endif
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#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(GST_STATIC_COMPILATION)
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# define _GST_EXPORT __declspec(dllexport)
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# define _GST_IMPORT __declspec(dllimport)
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#elif __GNUC__ >= 4
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# define _GST_EXPORT __attribute__((visibility("default")))
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# define _GST_IMPORT
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#else
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# define _GST_EXPORT
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# define _GST_IMPORT
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#endif
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#define GST_API_EXPORT _GST_EXPORT extern
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#define GST_API_IMPORT _GST_IMPORT extern
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#ifdef BUILDING_GST
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# define GST_API GST_API_EXPORT
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#else
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# define GST_API GST_API_IMPORT
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#endif
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/**
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* GST_PLUGIN_EXPORT:
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*
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* Export the plugin's definition.
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*
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* On Windows, this exports the plugin definition from the DLL.
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* On other platforms, this gets defined as a no-op.
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*/
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#define GST_PLUGIN_EXPORT _GST_EXPORT
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/**
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* GST_EXPORT:
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*
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* Export the given variable from the built shared object.
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*
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* On Windows, this exports the variable from the DLL.
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* On other platforms, this gets defined to "extern".
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* Deprecated: 1.22: Applications should define their own export macros.
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*/
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#ifdef GST_EXPORTS
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# define GST_EXPORT GST_API_EXPORT
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#else
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# define GST_EXPORT GST_API_IMPORT
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#endif
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/* These macros are used to mark deprecated functions in GStreamer headers,
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* and thus have to be exposed in installed headers. But please
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* do *not* use them in other projects. Instead, use G_DEPRECATED
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* or define your own wrappers around it. */
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#ifndef GST_DISABLE_DEPRECATED
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#define GST_DEPRECATED GST_API
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#define GST_DEPRECATED_FOR(f) GST_API
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#else
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#define GST_DEPRECATED G_DEPRECATED GST_API
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#define GST_DEPRECATED_FOR(f) G_DEPRECATED_FOR(f) GST_API
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#endif
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#endif /* __GST_CONFIG_H__ */
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