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gstreamer/meson.build
Tim-Philipp Müller b6411ae74c libs: fix API export/import and 'inconsistent linkage' on MSVC 
For each lib we build export its own API in headers when we're
building it, otherwise import the API from the headers.

This fixes linker warnings on Windows when building with MSVC.

The problem was that we had defined all GST_*_API decorators
unconditionally to GST_EXPORT. This was intentional and only
supposed to be temporary, but caused linker warnings because
we tell the linker that we want to export all symbols even
those from externall DLLs, and when the linker notices that
they were in external DLLS and not present locally it warns.

What we need to do when building each library is: export
the library's own symbols and import all other symbols. To
this end we define e.g. BUILDING_GST_FOO and then we define
the GST_FOO_API decorator either to export or to import
symbols depending on whether BUILDING_GST_FOO is set or not.
That way external users of each library API automatically
get the import.

While we're at it, add new GST_API_EXPORT in config.h and use
that for GST_*_API decorators instead of GST_EXPORT.

The right export define depends on the toolchain and whether
we're using -fvisibility=hidden or not, so it's better to set it
to the right thing directly than hard-coding a compiler whitelist
in the public header.

We put the export define into config.h instead of passing it via the
command line to the compiler because it might contain spaces and brackets
and in the autotools scenario we'd have to pass that through multiple
layers of plumbing and Makefile/shell escaping and we're just not going
to be *that* lucky.

The export define is only used if we're compiling our lib, not by external
users of the lib headers, so it's not a problem to put it into config.h

Also, this means all .c files of libs need to include config.h
to get the export marker defined, so fix up a few that didn't
include config.h.

This commit depends on a common submodule commit that makes gst-glib-gen.mak
add an #include "config.h" to generated enum/marshal .c files for the
autotools build.

https://bugzilla.gnome.org/show_bug.cgi?id=797185
2018-09-24 14:45:56 +01:00

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project('gst-plugins-bad', 'c', 'cpp',
version : '1.15.0.1',
meson_version : '>= 0.47',
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_dev = gst_version_minor % 2 == 1 and gst_version_micro < 90
glib_req = '>= 2.40.0'
gst_req = '>= @0@.@1@.0'.format(gst_version_major, gst_version_minor)
api_version = '1.0'
soversion = 0
# maintaining compatibility with the previous libtool versioning
# current = minor * 100 + micro
curversion = gst_version_minor * 100 + gst_version_micro
libversion = '@0@.@1@.0'.format(soversion, curversion)
osxversion = curversion + 1
plugins_install_dir = '@0@/gstreamer-1.0'.format(get_option('libdir'))
cc = meson.get_compiler('c')
cxx = meson.get_compiler('cpp')
cdata = configuration_data()
if cc.get_id() == 'msvc'
# 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
msvc_args = [
'/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)
]
add_project_arguments(msvc_args, language : 'c')
add_project_arguments(msvc_args, language : 'cpp')
# Disable SAFESEH with MSVC for plugins and libs that use external deps that
# are built with MinGW
noseh_link_args = ['/SAFESEH:NO']
else
if cxx.has_argument('-Wno-non-virtual-dtor')
add_project_arguments('-Wno-non-virtual-dtor', language: 'cpp')
endif
noseh_link_args = []
endif
if cc.has_link_argument('-Wl,-Bsymbolic-functions')
add_project_link_arguments('-Wl,-Bsymbolic-functions', language : 'c')
endif
# Symbol visibility
if cc.get_id() == 'msvc'
export_define = '__declspec(dllexport) extern'
elif cc.has_argument('-fvisibility=hidden')
add_project_arguments('-fvisibility=hidden', language: 'c')
export_define = 'extern __attribute__ ((visibility ("default")))'
else
export_define = 'extern'
endif
# Passing this through the command line would be too messy
cdata.set('GST_API_EXPORT', export_define)
# Disable strict aliasing
if cc.has_argument('-fno-strict-aliasing')
add_project_arguments('-fno-strict-aliasing', language: 'c')
endif
if cxx.has_argument('-fno-strict-aliasing')
add_project_arguments('-fno-strict-aliasing', language: 'cpp')
endif
# Define G_DISABLE_DEPRECATED for development versions
if gst_version_is_dev
message('Disabling deprecated GLib API')
add_project_arguments('-DG_DISABLE_DEPRECATED', language: 'c')
endif
cast_checks = get_option('gobject-cast-checks')
if cast_checks.disabled() or (cast_checks.auto() and not gst_version_is_dev)
message('Disabling GLib cast checks')
add_project_arguments('-DG_DISABLE_CAST_CHECKS', language: 'c')
endif
glib_asserts = get_option('glib-asserts')
if glib_asserts.disabled() or (glib_asserts.auto() and not gst_version_is_dev)
message('Disabling GLib asserts')
add_project_arguments('-DG_DISABLE_ASSERT', language: 'c')
endif
glib_checks = get_option('glib-checks')
if glib_checks.disabled() or (glib_checks.auto() and not gst_version_is_dev)
message('Disabling GLib checks')
add_project_arguments('-DG_DISABLE_CHECKS', language: 'c')
endif
check_headers = [
['HAVE_DLFCN_H', 'dlfcn.h'],
['HAVE_FCNTL_H', 'fcntl.h'],
['HAVE_INTTYPES_H', 'inttypes.h'],
['HAVE_MEMORY_H', 'memory.h'],
['HAVE_MSACM_H', 'msacm.h'],
['HAVE_NETINET_IN_H', 'netinet/in.h'],
['HAVE_NETINET_IP_H', 'netinet/ip.h'],
['HAVE_NETINET_TCP_H', 'netinet/tcp.h'],
['HAVE_PTHREAD_H', 'pthread.h'],
['HAVE_STDINT_H', 'stdint.h'],
['HAVE_STDLIB_H', 'stdlib.h'],
['HAVE_STRINGS_H', 'strings.h'],
['HAVE_STRING_H', 'string.h'],
['HAVE_SYS_PARAM_H', 'sys/param.h'],
['HAVE_SYS_SOCKET_H', 'sys/socket.h'],
['HAVE_SYS_STAT_H', 'sys/stat.h'],
['HAVE_SYS_TIME_H', 'sys/time.h'],
['HAVE_SYS_TYPES_H', 'sys/types.h'],
['HAVE_SYS_UTSNAME_H', 'sys/utsname.h'],
['HAVE_UNISTD_H', 'unistd.h'],
['HAVE_WINDOWS_H', 'windows.h'],
['HAVE_WINSOCK2_H', 'winsock2.h'],
['HAVE_WS2TCPIP_H', 'ws2tcpip.h'],
]
foreach h : check_headers
if cc.has_header(h.get(1))
cdata.set(h.get(0), 1)
endif
endforeach
check_functions = [
# check token HAVE_ACM
# check token HAVE_ANDROID_MEDIA
# check token HAVE_APEXSINK
# check token HAVE_APPLE_MEDIA
# check token HAVE_ASSRENDER
# check token HAVE_AVC
# check token HAVE_BLUEZ
# check token HAVE_BZ2
# check token HAVE_CFLOCALECOPYCURRENT
# check token HAVE_CFPREFERENCESCOPYAPPVALUE
# check token HAVE_CHROMAPRINT
# check token HAVE_CPU_ALPHA
# check token HAVE_CPU_ARM
# check token HAVE_CPU_CRIS
# check token HAVE_CPU_CRISV32
# check token HAVE_CPU_HPPA
# check token HAVE_CPU_I386
# check token HAVE_CPU_IA64
# check token HAVE_CPU_M68K
# check token HAVE_CPU_MIPS
# check token HAVE_CPU_PPC
# check token HAVE_CPU_PPC64
# check token HAVE_CPU_S390
# check token HAVE_CPU_SPARC
# check token HAVE_CPU_X86_64
# check token HAVE_CURL
# check token HAVE_DAALA
# check token HAVE_DASH
# check token HAVE_DC1394
['HAVE_DCGETTEXT', 'dcgettext'],
# check token HAVE_DECKLINK
# check token HAVE_DIRECT3D
# check token HAVE_DIRECTDRAW
# check token HAVE_DIRECTFB
# check token HAVE_DIRECTSOUND
# check token HAVE_DOWHILE_MACROS
# check token HAVE_DTS
# check token HAVE_DVB
# check token HAVE_EXPERIMENTAL
# check token HAVE_EXTERNAL
# check token HAVE_FAAC
# check token HAVE_FAAD
# check token HAVE_FBDEV
# check token HAVE_FLITE
# check token HAVE_FLUIDSYNTH
['HAVE_GETPAGESIZE', 'getpagesize'],
# check token HAVE_GETTEXT
# check token HAVE_GL
# check token HAVE_GLCHAR
# check token HAVE_GLEGLIMAGEOES
# check token HAVE_GLINTPTR
# check token HAVE_GLSIZEIPTR
# check token HAVE_GME
['HAVE_GMTIME_R', 'gmtime_r'],
# check token HAVE_GRAPHENE
# check token HAVE_GSETTINGS
# check token HAVE_GSM
# check token HAVE_GUDEV
# check token HAVE_HLS
# check token HAVE_ICONV
# check token HAVE_JPEG
# check token HAVE_KATE
# check token HAVE_LADSPA
# check token HAVE_LIBGCRYPT
# check token HAVE_LIBGME_ACCURACY
# check token HAVE_LIBMMS
# check token HAVE_LIBNSL
# check token HAVE_LIBSOCKET
# check token HAVE_LIBUSB
# check token HAVE_LIBVISUAL
# check token HAVE_LINSYS
# check token HAVE_LRDF
# check token HAVE_LV2
# check token HAVE_MIMIC
['HAVE_MMAP', 'mmap'],
# check token HAVE_MODPLUG
# check token HAVE_MPEG2ENC
# check token HAVE_MPG123
# check token HAVE_MPLEX
# check token HAVE_MUSEPACK
# check token HAVE_MYTHTV
# check token HAVE_NAS
# check token HAVE_NEON
# check token HAVE_NETTLE
# check token HAVE_OFA
# check token HAVE_OPENAL
# check token HAVE_OPENCV
# check token HAVE_OPENEXR
# check token HAVE_OPENJPEG
# check token HAVE_OPENJPEG_1
# check token HAVE_OPENNI2
# check token HAVE_OPENSLES
# check token HAVE_OPUS
# check token HAVE_ORC
# check token HAVE_OSX_VIDEO
['HAVE_PIPE2', 'pipe2'],
# check token HAVE_PNG
# check token HAVE_PVR
# check token HAVE_QUICKTIME
# check token HAVE_RDTSC
# check token HAVE_RESINDVD
# check token HAVE_RSVG
# check token HAVE_RSVG_2_36_2
# check token HAVE_RTMP
# check token HAVE_SBC
# check token HAVE_SDL
# check token HAVE_SHM
# check token HAVE_SMOOTHSTREAMING
# check token HAVE_SNDFILE
# check token HAVE_SNDIO
# check token HAVE_SOUNDTOUCH
# check token HAVE_SOUNDTOUCH_1_4
# check token HAVE_SPANDSP
# check token HAVE_SPC
# check token HAVE_SRTP
# check token HAVE_SSH2
# check token HAVE_TELETEXTDEC
# check token HAVE_TIGER
# check token HAVE_TIMIDITY
# check token HAVE_UVCH264
# check token HAVE_VALGRIND
# check token HAVE_VCD
# check token HAVE_VDPAU
# check token HAVE_VIDEOTOOLBOX
# check token HAVE_VOAACENC
# check token HAVE_VOAMRWBENC
# check token HAVE_WASAPI
# check token HAVE_WAYLAND
# check token HAVE_WEBP
# check token HAVE_WILDMIDI
# check token HAVE_WIN32
# check token HAVE_WININET
# check token HAVE_WINKS
# check token HAVE_WINSCREENCAP
# check token HAVE_XVID
# check token HAVE_ZBAR
]
foreach f : check_functions
if cc.has_function(f.get(1))
cdata.set(f.get(0), 1)
endif
endforeach
cdata.set('SIZEOF_CHAR', cc.sizeof('char'))
cdata.set('SIZEOF_INT', cc.sizeof('int'))
cdata.set('SIZEOF_LONG', cc.sizeof('long'))
cdata.set('SIZEOF_SHORT', cc.sizeof('short'))
cdata.set('SIZEOF_VOIDP', cc.sizeof('void*'))
cdata.set_quoted('VERSION', gst_version)
cdata.set_quoted('PACKAGE', 'gst-plugins-bad')
cdata.set_quoted('PACKAGE_VERSION', gst_version)
cdata.set_quoted('PACKAGE_BUGREPORT', 'http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer')
cdata.set_quoted('PACKAGE_NAME', 'GStreamer Bad Plug-ins')
cdata.set_quoted('GETTEXT_PACKAGE', 'gst-plugins-bad-1.0')
cdata.set_quoted('GST_API_VERSION', api_version)
cdata.set_quoted('GST_LICENSE', 'LGPL')
cdata.set_quoted('LIBDIR', join_paths(get_option('prefix'), get_option('libdir')))
cdata.set_quoted('LOCALEDIR', join_paths(get_option('prefix'), get_option('localedir')))
warning_flags = [
'-Wmissing-declarations',
'-Wredundant-decls',
'-Wwrite-strings',
'-Wformat',
'-Wformat-security',
'-Winit-self',
'-Wmissing-include-dirs',
'-Waddress',
'-Wno-multichar',
'-Wvla',
'-Wpointer-arith',
]
warning_c_flags = [
'-Wmissing-prototypes',
'-Wdeclaration-after-statement',
'-Wold-style-definition',
'-Wnested-externs',
]
warning_cxx_flags = [
'-Wformat-nonliteral',
]
foreach extra_arg : warning_c_flags
if cc.has_argument (extra_arg)
add_project_arguments([extra_arg], language: 'c')
endif
endforeach
foreach extra_arg : warning_cxx_flags
if cxx.has_argument (extra_arg)
add_project_arguments([extra_arg], language: 'cpp')
endif
endforeach
foreach extra_arg : warning_flags
if cc.has_argument (extra_arg)
add_project_arguments([extra_arg], language: 'c')
endif
if cxx.has_argument (extra_arg)
add_project_arguments([extra_arg], language: 'cpp')
endif
endforeach
# 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 Bad Plug-ins source release'
elif gst_version_nano == 1
gst_package_name = 'GStreamer Bad Plug-ins git'
else
gst_package_name = 'GStreamer Bad Plug-ins prerelease'
endif
endif
cdata.set_quoted('GST_PACKAGE_NAME', gst_package_name)
cdata.set_quoted('GST_PACKAGE_ORIGIN', get_option('package-origin'))
# FIXME: This should be exposed as a configuration option
host_system = host_machine.system()
if host_system == 'linux'
cdata.set_quoted('DEFAULT_VIDEOSRC', 'v4l2src')
elif ['darwin', 'ios'].contains(host_system)
cdata.set_quoted('DEFAULT_VIDEOSRC', 'avfvideosrc')
cdata.set_quoted('GST_EXTRA_MODULE_SUFFIX', '.dylib')
# Yes, we set this for iOS too. Same as Autotools.
cdata.set('HAVE_OSX', 1)
else
cdata.set_quoted('DEFAULT_VIDEOSRC', 'videotestsrc')
endif
# Mandatory GST deps
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'])
gstnet_dep = dependency('gstreamer-net-1.0', version : gst_req,
fallback : ['gstreamer', 'gst_net_dep'])
gstcontroller_dep = dependency('gstreamer-controller-1.0', version : gst_req,
fallback : ['gstreamer', 'gst_controller_dep'])
gstpbutils_dep = dependency('gstreamer-pbutils-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'pbutils_dep'])
gstallocators_dep = dependency('gstreamer-allocators-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'allocators_dep'])
gstapp_dep = dependency('gstreamer-app-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'app_dep'])
gstaudio_dep = dependency('gstreamer-audio-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'audio_dep'])
gstfft_dep = dependency('gstreamer-fft-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'fft_dep'])
gstriff_dep = dependency('gstreamer-riff-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'riff_dep'])
gstrtp_dep = dependency('gstreamer-rtp-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'rtp_dep'])
gstrtsp_dep = dependency('gstreamer-rtsp-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'rtsp_dep'])
gstsdp_dep = dependency('gstreamer-sdp-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'sdp_dep'])
gsttag_dep = dependency('gstreamer-tag-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'tag_dep'])
gstvideo_dep = dependency('gstreamer-video-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'video_dep'])
if host_machine.system() != 'windows'
gstcheck_dep = dependency('gstreamer-check-1.0', version : gst_req,
required : get_option('tests'),
fallback : ['gstreamer', 'gst_check_dep'])
endif
# GStreamer OpenGL
gstgl_dep = dependency('gstreamer-gl-1.0', version : gst_req,
fallback : ['gst-plugins-base', 'gstgl_dep'], required: get_option('gl'))
if gstgl_dep.found()
if gstgl_dep.type_name() == 'pkgconfig'
gst_gl_apis = gstgl_dep.get_pkgconfig_variable('gl_apis').split()
gst_gl_winsys = gstgl_dep.get_pkgconfig_variable('gl_winsys').split()
gst_gl_platforms = gstgl_dep.get_pkgconfig_variable('gl_platforms').split()
else
gstbase = subproject('gst-plugins-base')
gst_gl_apis = gstbase.get_variable('enabled_gl_apis')
gst_gl_winsys = gstbase.get_variable('enabled_gl_winsys')
gst_gl_platforms = gstbase.get_variable('enabled_gl_platforms')
endif
message('GStreamer OpenGL window systems: @0@'.format(' '.join(gst_gl_winsys)))
message('GStreamer OpenGL platforms: @0@'.format(' '.join(gst_gl_platforms)))
message('GStreamer OpenGL apis: @0@'.format(' '.join(gst_gl_apis)))
foreach ws : ['x11', 'wayland', 'android', 'cocoa', 'eagl', 'win32', 'dispmanx', 'viv_fb']
set_variable('gst_gl_have_window_@0@'.format(ws), gst_gl_winsys.contains(ws))
endforeach
foreach p : ['glx', 'egl', 'cgl', 'eagl', 'wgl']
set_variable('gst_gl_have_platform_@0@'.format(p), gst_gl_platforms.contains(p))
endforeach
foreach api : ['opengl', 'gles2']
set_variable('gst_gl_have_api_@0@'.format(api), gst_gl_apis.contains(api))
endforeach
endif
libm = cc.find_library('m', required : false)
glib_dep = dependency('glib-2.0', version : glib_req, fallback: ['glib', 'libglib_dep'])
gmodule_dep = dependency('gmodule-2.0', fallback: ['glib', 'libgmodule_dep'])
gio_dep = dependency('gio-2.0', fallback: ['glib', 'libgio_dep'])
# gio-unix-2.0 is used by sys/bluez
# Optional dep of ext/gl and gst/librfb
x11_dep = dependency('x11', required : get_option('x11'))
if x11_dep.found()
cdata.set('HAVE_X11', 1)
endif
if host_machine.system() == 'windows'
winsock2 = [cc.find_library('ws2_32')]
else
winsock2 = []
endif
if ['darwin', 'ios'].contains(host_system)
add_languages('objc')
if host_system == 'ios'
cdata.set('HAVE_IOS', 1)
endif
avfoundation_dep = dependency('AVFoundation', required : false)
if avfoundation_dep.found()
cdata.set('HAVE_AVFOUNDATION', 1)
endif
videotoolbox_dep = dependency('VideoToolbox', required : false)
if videotoolbox_dep.found()
cdata.set('HAVE_VIDEOTOOLBOX', 1)
endif
# FIXME: framework.version() returns 'unknown'
# if videotoolbox_dep.version().version_compare('>=10.9.6')
# cdata.set('HAVE_VIDEOTOOLBOX_10_9_6', 1)
# endif
endif
have_orcc = false
orcc_args = []
# Used by various libraries/elements that use Orc code
orc_dep = dependency('orc-0.4', required : get_option('orc'))
orcc = find_program('orcc', required : get_option('orc'))
if orc_dep.found() and orcc.found()
have_orcc = true
orcc_args = [orcc, '--include', 'glib.h']
cdata.set('HAVE_ORC', 1)
else
message('Orc Compiler not found or disabled, will use backup C code')
cdata.set('DISABLE_ORC', 1)
endif
if gst_dep.type_name() == 'internal'
gst_debug_disabled = not subproject('gstreamer').get_variable('gst_debug')
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)
gst_debug_disabled = cc.has_header_symbol('gst/gstconfig.h', 'GST_DISABLE_GST_DEBUG', dependencies: gst_dep)
endif
if gst_debug_disabled and cc.has_argument('-Wno-unused')
add_project_arguments('-Wno-unused', language: 'c')
endif
gst_plugins_bad_args = ['-DHAVE_CONFIG_H']
configinc = include_directories('.')
libsinc = include_directories('gst-libs')
python3 = import('python3').find_python()
gir = find_program('g-ir-scanner', required : get_option('introspection'))
gnome = import('gnome')
build_gir = gir.found() and not meson.is_cross_build()
gir_init_section = [ '--add-init-section=extern void gst_init(gint*,gchar**);' + \
'g_setenv("GST_REGISTRY_1.0", "@0@", TRUE);'.format(meson.current_build_dir() + '/gir_empty_registry.reg') + \
'g_setenv("GST_PLUGIN_PATH_1_0", "", TRUE);' + \
'g_setenv("GST_PLUGIN_SYSTEM_PATH_1_0", "", TRUE);' + \
'gst_init(NULL,NULL);' ]
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
subdir('gst-libs')
subdir('gst')
subdir('sys')
subdir('ext')
subdir('tests')
subdir('pkgconfig')
# xgettext is optional (on Windows for instance)
if find_program('xgettext', required : get_option('nls')).found()
cdata.set('ENABLE_NLS', 1)
subdir('po')
endif
configure_file(output : 'config.h', configuration : cdata)
run_command(python3, '-c', 'import shutil; shutil.copy("hooks/pre-commit.hook", ".git/hooks/pre-commit")')
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