gstreamer/gst/meson.build
Tim-Philipp Müller 46ed0f0489 libs: fix 'inconsistent DLL linkage' warnings on Windows
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.

https://bugzilla.gnome.org/show_bug.cgi?id=797185
2018-09-23 23:23:01 +01:00

279 lines
6.7 KiB
Meson

gst_sources = [
'gst.c',
'gstobject.c',
'gstallocator.c',
'gstbin.c',
'gstbuffer.c',
'gstbufferlist.c',
'gstbufferpool.c',
'gstbus.c',
'gstcaps.c',
'gstcapsfeatures.c',
'gstchildproxy.c',
'gstclock.c',
'gstcontext.c',
'gstcontrolbinding.c',
'gstcontrolsource.c',
'gstdatetime.c',
'gstdebugutils.c',
'gstdevice.c',
'gstdeviceprovider.c',
'gstdeviceproviderfactory.c',
'gstdynamictypefactory.c',
'gstelement.c',
'gstelementfactory.c',
'gsterror.c',
'gstevent.c',
'gstformat.c',
'gstghostpad.c',
'gstdevicemonitor.c',
'gstinfo.c',
'gstiterator.c',
'gstatomicqueue.c',
'gstmessage.c',
'gstmeta.c',
'gstmemory.c',
'gstminiobject.c',
'gstpad.c',
'gstpadtemplate.c',
'gstparamspecs.c',
'gstpipeline.c',
'gstplugin.c',
'gstpluginfeature.c',
'gstpluginloader.c',
'gstpoll.c',
'gstpreset.c',
'gstprotection.c',
'gstquark.c',
'gstquery.c',
'gstregistry.c',
'gstregistrychunks.c',
'gstpromise.c',
'gstsample.c',
'gstsegment.c',
'gststreamcollection.c',
'gststreams.c',
'gststructure.c',
'gstsystemclock.c',
'gsttaglist.c',
'gsttagsetter.c',
'gsttask.c',
'gsttaskpool.c',
'gsttoc.c',
'gsttocsetter.c',
'gsttracer.c',
'gsttracerfactory.c',
'gsttracerrecord.c',
'gsttracerutils.c',
'gsttypefind.c',
'gsttypefindfactory.c',
'gsturi.c',
'gstutils.c',
'gstvalue.c',
'gstparse.c',
]
gst_headers = [
'gst.h',
'glib-compat.h',
'gstobject.h',
'gstallocator.h',
'gstbin.h',
'gstbuffer.h',
'gstbufferlist.h',
'gstbufferpool.h',
'gstbus.h',
'gstcaps.h',
'gstcapsfeatures.h',
'gstchildproxy.h',
'gstclock.h',
'gstcompat.h',
'gstcontext.h',
'gstcontrolbinding.h',
'gstcontrolsource.h',
'gstdatetime.h',
'gstdebugutils.h',
'gstelement.h',
'gstelementmetadata.h',
'gstdevice.h',
'gstdeviceprovider.h',
'gstdeviceproviderfactory.h',
'gstdynamictypefactory.h',
'gstelementfactory.h',
'gsterror.h',
'gstevent.h',
'gstformat.h',
'gstghostpad.h',
'gstdevicemonitor.h',
'gstinfo.h',
'gstiterator.h',
'gstatomicqueue.h',
'gstmacros.h',
'gstmessage.h',
'gstmeta.h',
'gstmemory.h',
'gstminiobject.h',
'gstpad.h',
'gstpadtemplate.h',
'gstparamspecs.h',
'gstpipeline.h',
'gstplugin.h',
'gstpluginfeature.h',
'gstpoll.h',
'gstpreset.h',
'gstprotection.h',
'gstquery.h',
'gstpromise.h',
'gstsample.h',
'gstsegment.h',
'gststreamcollection.h',
'gststreams.h',
'gststructure.h',
'gstsystemclock.h',
'gsttaglist.h',
'gsttagsetter.h',
'gsttask.h',
'gsttaskpool.h',
'gsttoc.h',
'gsttocsetter.h',
'gsttracer.h',
'gsttracerfactory.h',
'gsttracerrecord.h',
'gsttypefind.h',
'gsttypefindfactory.h',
'gsturi.h',
'gstutils.h',
'gstvalue.h',
'gstregistry.h',
'gstparse.h',
'math-compat.h',
]
install_headers(gst_headers, subdir : 'gstreamer-1.0/gst')
gst_registry = get_option('registry')
if gst_registry
gst_registry_sources = ['gstregistrybinary.c']
else
gst_registry_sources = []
endif
# Make copy so configure_file consumes the copy and we can
# still add to the original cdata later.
gst_cdata = cdata
if gst_debug
gst_cdata.set('GST_DISABLE_GST_DEBUG_DEFINE', '#undef GST_DISABLE_GST_DEBUG')
else
gst_cdata.set('GST_DISABLE_GST_DEBUG_DEFINE', '#define GST_DISABLE_GST_DEBUG 1')
endif
if gst_registry
gst_cdata.set('GST_DISABLE_REGISTRY_DEFINE', '#undef GST_DISABLE_REGISTRY')
else
gst_cdata.set('GST_DISABLE_REGISTRY_DEFINE', '#define GST_DISABLE_REGISTRY 1')
endif
gst_parse = get_option('gst_parse')
if gst_parse
gst_cdata.set('GST_DISABLE_PARSE_DEFINE', '#undef GST_DISABLE_PARSE')
else
gst_cdata.set('GST_DISABLE_PARSE_DEFINE', '#define GST_DISABLE_PARSE 1')
endif
# FIXME: add --disable-plugin option?
gst_cdata.set('GST_DISABLE_PLUGIN_DEFINE', '#undef GST_DISABLE_PLUGIN')
configure_file(input : 'gstconfig.h.in',
output : 'gstconfig.h',
install_dir : join_paths(get_option('includedir'), 'gstreamer-1.0/gst'),
configuration : gst_cdata)
version_cdata = configuration_data()
version_cdata.set('GST_VERSION_MAJOR', gst_version_major)
version_cdata.set('GST_VERSION_MINOR', gst_version_minor)
version_cdata.set('GST_VERSION_MICRO', gst_version_micro)
version_cdata.set('GST_VERSION_NANO', gst_version_nano)
gst_version_h = configure_file(input : 'gstversion.h.in',
output : 'gstversion.h',
install_dir : join_paths(get_option('includedir'), 'gstreamer-1.0/gst'),
configuration : version_cdata)
gst_enums = gnome.mkenums_simple('gstenumtypes',
sources : gst_headers,
header_prefix : '#include <gst/gstconfig.h>',
body_prefix : '#include "gst/gst_private.h"\n#include <gst/gst.h>',
decorator : 'GST_API',
install_header : true,
install_dir : join_paths(get_option('includedir'), 'gstreamer-1.0/gst'))
gstenum_h = gst_enums[1]
gstenum_c = gst_enums[0]
gst_parse_sources = []
if gst_parse
subdir('parse')
endif
subdir('printf')
libgst_c_args = gst_c_args + [
'-D_GNU_SOURCE',
'-DG_LOG_DOMAIN=g_log_domain_gstreamer',
'-DGST_DISABLE_DEPRECATED',
]
tracer_hooks = get_option('tracer_hooks')
if not tracer_hooks
libgst_c_args += ['-DGST_DISABLE_GST_TRACER_HOOKS']
endif
# Make sure that subproject building gir files work
gst_incdirs = [configinc]
gst_gen_sources = [gstenum_h]
libgst = library('gstreamer-1.0', gst_sources,
gstenum_h, gstenum_c, gst_parse_sources, gst_registry_sources,
version : libversion,
soversion : soversion,
darwin_versions : osxversion,
c_args : libgst_c_args + ['-DBUILDING_GST'],
include_directories : [configinc,
# HACK, change include paths in .y and .l in final version.
include_directories('parse')],
link_with : printf_lib,
install : true,
dependencies : [gobject_dep, gmodule_dep, glib_dep, mathlib, dl_dep] + backtrace_deps
+ platform_deps,
)
if build_gir
gst_gir_extra_args = gir_init_section + [ '--c-include=gst/gst.h' ]
if meson.is_subproject()
# FIXME: There must be a better way to do this
# Need to pass the include path to find gst/gst.h and gst/gstenumtypes.h (built)
gst_gir_extra_args += ['--cflags-begin',
'-I' + meson.current_source_dir() + '/..',
'-I' + meson.current_build_dir() + '/..',
'--cflags-end']
endif
gst_incdirs += [configinc]
gst_gen_sources += [gnome.generate_gir(libgst,
sources : gst_sources + gst_headers + gst_enums + [gst_version_h],
namespace : 'Gst',
nsversion : apiversion,
identifier_prefix : 'Gst',
symbol_prefix : 'gst',
export_packages : 'gstreamer-1.0',
includes : ['GLib-2.0', 'GObject-2.0', 'GModule-2.0' ],
install : true,
extra_args : gst_gir_extra_args,
)]
endif
gst_dep = declare_dependency(link_with : libgst,
include_directories : gst_incdirs,
dependencies : [glib_dep, gobject_dep, gmodule_dep],
# Everything that uses libgst needs this built to compile
sources : gst_gen_sources,
)