/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2004,2005 Wim Taymans * * gstconfig.h: GST_DISABLE_* macros for build configuration * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:gstconfig * @short_description: Build configuration options * * This describes the configuration options for GStreamer. When building * GStreamer there are a lot of parts (known internally as "subsystems" ) that * can be disabled for various reasons. The most common reasons are speed and * size, which is important because GStreamer is designed to run on embedded * systems. * * If a subsystem is disabled, most of this changes are done in an API * compatible way, so you don't need to adapt your code in most cases. It is * never done in an ABI compatible way though. So if you want to disable a * subsystem, you have to rebuild all programs depending on GStreamer, too. * * If a subsystem is disabled in GStreamer, a value is defined in * <gst/gst.h>. You can check this if you do subsystem-specific stuff. * * Doing subsystem specific things * * &hash;ifndef GST_DISABLE_GST_DEBUG * // do stuff specific to the debugging subsystem * &hash;endif // GST_DISABLE_GST_DEBUG * * */ #ifndef __GST_CONFIG_H__ #define __GST_CONFIG_H__ /* trick gtk-doc into believing these symbols are defined (yes, it's ugly) */ #if 0 #define GST_DISABLE_GST_DEBUG 1 #define GST_DISABLE_PARSE 1 #define GST_DISABLE_REGISTRY 1 #define GST_DISABLE_PLUGIN 1 #endif /***** default padding of structures *****/ #define GST_PADDING 4 #define GST_PADDING_INIT { NULL } /***** padding for very extensible base classes *****/ #define GST_PADDING_LARGE 20 /***** disabling of subsystems *****/ /** * GST_DISABLE_GST_DEBUG: * * Configures the inclusion of the debugging subsystem */ #undef GST_DISABLE_GST_DEBUG /** * GST_DISABLE_PARSE: * * Configures the inclusion of the gst-launch parser */ #undef GST_DISABLE_PARSE /** * GST_DISABLE_REGISTRY: * * Configures the use of the plugin registry. * If one disables this, required plugins need to be loaded and registered * manually */ #undef GST_DISABLE_REGISTRY /* FIXME: test and document these! */ /* Configures the use of external plugins */ #undef GST_DISABLE_PLUGIN /* Whether or not the CPU supports unaligned access * The macros used are defined consistently by GCC, Clang, MSVC, Sun, and ICC * * References: * https://sourceforge.net/p/predef/wiki/Architectures/ * https://msdn.microsoft.com/en-us/library/b0084kay.aspx * http://docs.oracle.com/cd/E19205-01/820-4155/c++_faq.html#Vers6 * https://software.intel.com/en-us/node/583402 */ #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_IA64) || defined(__xtensa__) || defined(__e2k__) # define GST_HAVE_UNALIGNED_ACCESS 0 #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__) # define GST_HAVE_UNALIGNED_ACCESS 1 #else # error "Could not detect architecture; don't know whether it supports unaligned access! Please file a bug." #endif /** * GST_EXPORT: * * Export the given variable from the built shared object. * * On Windows, this exports the variable from the DLL. * On other platforms, this gets defined to "extern". */ /** * GST_PLUGIN_EXPORT: * * Export the plugin's definition. * * On Windows, this exports the plugin definition from the DLL. * On other platforms, this gets defined as a no-op. */ /* Only use __declspec(dllexport/import) when we have been built with MSVC or * the user is linking to us with MSVC. The only remaining case is when we were * built with MinGW and are linking with MinGW in which case we rely on the * linker to auto-export/import symbols. Of course all this is only used when * not linking statically. * * NOTE: To link to GStreamer statically on Windows, you must define * GST_STATIC_COMPILATION or the prototypes will cause the compiler to search * for the symbol inside a DLL. */ #if (0 || defined(_MSC_VER)) && !defined(GST_STATIC_COMPILATION) # define GST_PLUGIN_EXPORT __declspec(dllexport) # ifdef GST_EXPORTS # define GST_EXPORT __declspec(dllexport) # else # define GST_EXPORT __declspec(dllimport) extern # endif #else # if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)) # define GST_PLUGIN_EXPORT __attribute__ ((visibility ("default"))) # define GST_EXPORT extern __attribute__ ((visibility ("default"))) # else # define GST_PLUGIN_EXPORT # define GST_EXPORT extern # endif #endif #ifndef GST_API #define GST_API GST_EXPORT #endif /* These macros are used to mark deprecated functions in GStreamer headers, * and thus have to be exposed in installed headers. But please * do *not* use them in other projects. Instead, use G_DEPRECATED * or define your own wrappers around it. */ #ifndef GST_DISABLE_DEPRECATED #define GST_DEPRECATED GST_API #define GST_DEPRECATED_FOR(f) GST_API #else #define GST_DEPRECATED G_DEPRECATED GST_API #define GST_DEPRECATED_FOR(f) G_DEPRECATED_FOR(f) GST_API #endif #endif /* __GST_CONFIG_H__ */