gstreamer/subprojects/gst-libav/meson.build
Zebediah Figura c4681ac428 meson: Build with -Wl,-z,nodelete to prevent unloading of dynamic libraries and plugins
GLib made the unfortunate decision to prevent libgobject from ever being
unloaded, which means that now any library which registers a static type
can't ever be unloaded either (and any library that depends on those,
ad nauseam).

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/778>
2022-09-13 15:48:52 +00:00

245 lines
8.5 KiB
Meson

project('gst-libav', 'c',
version : '1.21.0.1',
meson_version : '>= 0.60',
default_options : [ 'warning_level=1',
'buildtype=debugoptimized' ])
gst_version = meson.project_version()
version_arr = gst_version.split('.')
gst_version_major = version_arr[0].to_int()
gst_version_minor = version_arr[1].to_int()
gst_version_micro = version_arr[2].to_int()
if version_arr.length() == 4
gst_version_nano = version_arr[3].to_int()
else
gst_version_nano = 0
endif
gst_version_is_stable = gst_version_minor.is_even()
gst_version_is_dev = gst_version_minor.is_odd() and gst_version_micro < 90
api_version = '1.0'
libavfilter_dep = dependency('libavfilter', version: '>= 7.16.100',
fallback: ['FFmpeg', 'libavfilter_dep'])
libavformat_dep = dependency('libavformat', version: '>= 58.12.100',
fallback: ['FFmpeg', 'libavformat_dep'])
libavcodec_dep = dependency('libavcodec', version: '>= 58.18.100',
fallback: ['FFmpeg', 'libavcodec_dep'])
libavutil_dep = dependency('libavutil', version: '>= 56.14.100',
fallback: ['FFmpeg', 'libavutil_dep'])
libav_deps = [libavfilter_dep, libavformat_dep, libavcodec_dep, libavutil_dep]
cc = meson.get_compiler('c')
static_build = get_option('default_library') == 'static'
check_ffmpeg_src = '''#include <libavcodec/avcodec.h>
#if LIBAVCODEC_VERSION_MICRO >= 100
/* FFmpeg uses 100+ as its micro version */
#else
#error libav provider should be FFmpeg
#endif'''
libav_deps_type_name = ''
foreach dep: libav_deps
if libav_deps_type_name != '' and dep.type_name() != libav_deps_type_name
error('Libav deps must be either all internal or all external')
endif
libav_deps_type_name = dep.type_name()
endforeach
if dep.type_name() != 'internal'
if not cc.compiles(check_ffmpeg_src, dependencies : libav_deps, name : 'libav is provided by FFmpeg')
error('Uncompatible libavcodec found')
endif
endif
cdata = configuration_data()
cdata.set('LIBAV_SOURCE', '"system install"')
cdata.set('PACKAGE_VERSION', '"@0@"'.format(gst_version))
cdata.set('PACKAGE', '"gst-libav"')
# GStreamer package name and origin url
gst_package_name = get_option('package-name')
if gst_package_name == ''
if gst_version_nano == 0
gst_package_name = 'GStreamer FFMPEG Plug-ins source release'
elif gst_version_nano == 1
gst_package_name = 'GStreamer FFMPEG Plug-ins git'
else
gst_package_name = 'GStreamer FFMPEG Plug-ins prerelease'
endif
endif
cdata.set_quoted('GST_PACKAGE_NAME', gst_package_name)
cdata.set_quoted('GST_PACKAGE_ORIGIN', get_option('package-origin'))
check_headers = [['unistd.h', 'HAVE_UNISTD_H']]
foreach h : check_headers
if cc.has_header(h.get(0))
cdata.set(h.get(1), 1)
endif
endforeach
if gst_version_is_stable
gst_req = '>= @0@.@1@.0'.format(gst_version_major, gst_version_minor)
else
gst_req = '>= ' + gst_version
endif
gst_dep = dependency('gstreamer-1.0', version : gst_req,
fallback : ['gstreamer', 'gst_dep'])
gstbase_dep = dependency('gstreamer-base-1.0', version : gst_req,
fallback : ['gstreamer', 'gst_base_dep'])
gstcheck_dep = dependency('gstreamer-check-1.0', version : gst_req,
required : get_option('tests'),
fallback : ['gstreamer', 'gst_check_dep'])
gstvideo_dep = dependency('gstreamer-video-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'video_dep'])
gstaudio_dep = dependency('gstreamer-audio-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'audio_dep'])
gstpbutils_dep = dependency('gstreamer-pbutils-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'pbutils_dep'])
libm = cc.find_library('m', required : false)
gst_libav_args = ['-DHAVE_CONFIG_H']
if cc.get_id() == 'msvc'
msvc_args = [
# Ignore several spurious warnings for things gstreamer does very commonly
# If a warning is completely useless and spammy, use '/wdXXXX' to suppress it
# If a warning is harmless but hard to fix, use '/woXXXX' so it's shown once
# NOTE: Only add warnings here if you are sure they're spurious
'/wd4018', # implicit signed/unsigned conversion
'/wd4146', # unary minus on unsigned (beware INT_MIN)
'/wd4244', # lossy type conversion (e.g. double -> int)
'/wd4305', # truncating type conversion (e.g. double -> float)
cc.get_supported_arguments(['/utf-8']), # set the input encoding to utf-8
]
if gst_version_is_dev
# Enable some warnings on MSVC to match GCC/Clang behaviour
msvc_args += cc.get_supported_arguments([
'/we4002', # too many actual parameters for macro 'identifier'
'/we4003', # not enough actual parameters for macro 'identifier'
'/we4013', # 'function' undefined; assuming extern returning int
'/we4020', # 'function' : too many actual parameters
'/we4027', # function declared without formal parameter list
'/we4029', # declared formal parameter list different from definition
'/we4033', # 'function' must return a value
'/we4045', # 'array' : array bounds overflow
'/we4047', # 'operator' : 'identifier1' differs in levels of indirection from 'identifier2'
'/we4053', # one void operand for '?:'
'/we4062', # enumerator 'identifier' in switch of enum 'enumeration' is not handled
'/we4098', # 'function' : void function returning a value
'/we4101', # 'identifier' : unreferenced local variable
'/we4189', # 'identifier' : local variable is initialized but not referenced
])
endif
add_project_arguments(msvc_args, language: ['c', 'cpp'])
endif
# glib doesn't support unloading, which means that unloading and reloading
# any library that registers static types will fail
if cc.has_link_argument('-Wl,-z,nodelete')
add_project_link_arguments('-Wl,-z,nodelete', language: 'c')
endif
# Symbol visibility
if cc.has_argument('-fvisibility=hidden')
add_project_arguments('-fvisibility=hidden', language: 'c')
endif
# Don't export any symbols from static ffmpeg libraries
if cc.has_link_argument('-Wl,--exclude-libs=ALL')
add_project_link_arguments('-Wl,--exclude-libs=ALL', language: 'c')
endif
# Disable strict aliasing
if cc.has_argument('-fno-strict-aliasing')
add_project_arguments('-fno-strict-aliasing', language: 'c')
endif
if gst_dep.type_name() == 'internal'
gst_proj = subproject('gstreamer')
if not gst_proj.get_variable('gst_debug')
message('GStreamer debug system is disabled')
add_project_arguments('-Wno-unused', language: 'c')
else
message('GStreamer debug system is enabled')
endif
else
# We can't check that in the case of subprojects as we won't
# be able to build against an internal dependency (which is not built yet)
if not cc.compiles('''
#include <gst/gstconfig.h>
#ifdef GST_DISABLE_GST_DEBUG
#error "debugging disabled, make compiler fail"
#endif''' , dependencies: gst_dep)
message('GStreamer debug system is disabled')
add_project_arguments('-Wno-unused', language: 'c')
else
message('GStreamer debug system is enabled')
endif
endif
warning_flags = [
'-Wmissing-declarations',
'-Wmissing-prototypes',
'-Wold-style-definition',
'-Wredundant-decls',
'-Wundef',
'-Wwrite-strings',
'-Wformat',
'-Wformat-nonliteral',
'-Wformat-security',
'-Winit-self',
'-Wmissing-include-dirs',
'-Waddress',
'-Wno-multichar',
'-Waggregate-return',
'-Wvla',
'-Wpointer-arith',
]
foreach extra_arg : warning_flags
if cc.has_argument (extra_arg)
add_project_arguments([extra_arg], language: 'c')
endif
endforeach
configinc = include_directories('.')
plugins_install_dir = '@0@/gstreamer-1.0'.format(get_option('libdir'))
pkgconfig = import('pkgconfig')
plugins_pkgconfig_install_dir = join_paths(plugins_install_dir, 'pkgconfig')
if get_option('default_library') == 'shared'
# If we don't build static plugins there is no need to generate pc files
plugins_pkgconfig_install_dir = disabler()
endif
plugins = []
subdir('ext/libav')
subdir('docs')
subdir('tests')
# Set release date
if gst_version_nano == 0
extract_release_date = find_program('scripts/extract-release-date-from-doap-file.py')
run_result = run_command(extract_release_date, gst_version, files('gst-libav.doap'), check: true)
release_date = run_result.stdout().strip()
cdata.set_quoted('GST_PACKAGE_RELEASE_DATETIME', release_date)
message('Package release date: ' + release_date)
endif
configure_file(output: 'config.h', configuration: cdata)
gst_plugins = []
foreach plugin: plugins
pkgconfig.generate(plugin, install_dir: plugins_pkgconfig_install_dir)
dep = declare_dependency(link_with: plugin, variables: {'full_path': plugin.full_path()})
meson.override_dependency(plugin.name(), dep)
gst_plugins += [dep]
endforeach