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gstreamer/gst/Makefile.am
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

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Makefile
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lib_LTLIBRARIES = libgstreamer-@GST_API_VERSION@.la
if GST_DISABLE_REGISTRY
GST_REGISTRY_SRC =
else
GST_REGISTRY_SRC = gstregistrybinary.c
endif
if GST_DISABLE_PARSE
SUBDIRS_PARSE =
GST_PARSE_LA =
else
SUBDIRS_PARSE = parse
GST_PARSE_LA = parse/libgstparse.la
endif
if GST_DISABLE_PLUGIN
GST_PLUGIN_SRC =
else
GST_PLUGIN_SRC = gstplugin.c
endif
if !GST_DISABLE_GST_DEBUG
SUBDIRS_PRINTF = printf
GST_PRINTF_LA = printf/libgstprintf.la
else
SUBDIRS_PRINTF =
GST_PRINTF_LA =
endif
SUBDIRS = $(SUBDIRS_PARSE) $(SUBDIRS_PRINTF)
DIST_SUBDIRS = parse printf
# make variables for all generated source and header files to make the
# distinction clear
built_headers_configure = gstversion.h gstconfig.h
built_header_make = gstenumtypes.h
built_source_make = gstenumtypes.c
EXTRA_libgstreamer_@GST_API_VERSION@_la_SOURCES = \
gstregistrybinary.c
# temporarily not used
# glib-compat.c
libgstreamer_@GST_API_VERSION@_la_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 \
gstdevicemonitor.c \
gstdeviceprovider.c \
gstdeviceproviderfactory.c \
gstdynamictypefactory.c \
gstelement.c \
gstelementfactory.c \
gsterror.c \
gstevent.c \
gstformat.c \
gstghostpad.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_REGISTRY_SRC)
# do not put files in the distribution that are generated
nodist_libgstreamer_@GST_API_VERSION@_la_SOURCES = $(built_source_make)
# BUILT_SOURCES are built on make all/check/install before all other targets
BUILT_SOURCES = \
$(built_headers_configure) \
$(built_header_make) \
$(built_source_make)
# CLEANFILES is for files generated by make
CLEANFILES = $(built_header_make) $(built_source_make) $(as_dll_cleanfiles) *.gcno *.gcda *.gcov *.gcov.out
# DISTCLEANFILES is for files generated by configure
DISTCLEANFILES = $(built_headers_configure)
libgstreamer_@GST_API_VERSION@_la_CFLAGS = \
-D_GNU_SOURCE \
-DBUILDING_GST \
-DG_LOG_DOMAIN=g_log_domain_gstreamer \
-DGST_API_VERSION=\""$(GST_API_VERSION)"\" \
-DGST_DISABLE_DEPRECATED \
$(VALGRIND_CFLAGS) \
$(UNWIND_CFLAGS) \
$(DW_CFLAGS) \
$(GST_ALL_CFLAGS)
libgstreamer_@GST_API_VERSION@_la_LIBADD = \
$(GST_PARSE_LA) \
$(GST_PRINTF_LA) \
$(GST_ALL_LIBS) \
$(WIN32_LIBS) \
$(SOCKET_LIBS) \
$(UNWIND_LIBS) \
$(DW_LIBS) \
$(LIBM)
libgstreamer_@GST_API_VERSION@_la_LDFLAGS = \
$(GST_LIB_LDFLAGS) $(GST_ALL_LDFLAGS) $(GST_LT_LDFLAGS)
libgstreamer_@GST_API_VERSION@includedir = $(includedir)/gstreamer-@GST_API_VERSION@/gst
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
libgstreamer_@GST_API_VERSION@include_HEADERS = $(gst_headers) math-compat.h
nodist_libgstreamer_@GST_API_VERSION@include_HEADERS = \
$(built_headers_configure) $(built_header_make)
noinst_HEADERS = \
gettext.h \
glib-compat-private.h \
gst-i18n-lib.h \
gst-i18n-app.h \
gstelementmetadata.h \
gstpluginloader.h \
gstquark.h \
gstregistrybinary.h \
gstregistrychunks.h \
gsttracerutils.h \
gst_private.h
gstenumtypes.h: $(gst_headers)
$(AM_V_GEN)$(GLIB_MKENUMS) \
--fhead "#ifndef __GST_ENUM_TYPES_H__\n#define __GST_ENUM_TYPES_H__\n\n#include <glib-object.h>\n#include <gst/gstconfig.h>\n\nG_BEGIN_DECLS\n" \
--fprod "\n/* enumerations from \"@filename@\" */\n" \
--vhead "GST_API GType @enum_name@_get_type (void);\n#define GST_TYPE_@ENUMSHORT@ (@enum_name@_get_type())\n" \
--ftail "G_END_DECLS\n\n#endif /* __GST_ENUM_TYPES_H__ */" \
$^ > gstenumtypes.h
gstenumtypes.c: $(gst_headers)
$(AM_V_GEN)$(GLIB_MKENUMS) \
--fhead "#include \"gst_private.h\"\n#include <gst/gst.h>\n#define C_ENUM(v) ((gint) v)\n#define C_FLAGS(v) ((guint) v)\n " \
--fprod "\n/* enumerations from \"@filename@\" */" \
--vhead "GType\n@enum_name@_get_type (void)\n{\n static gsize id = 0;\n static const G@Type@Value values[] = {" \
--vprod " { C_@TYPE@(@VALUENAME@), \"@VALUENAME@\", \"@valuenick@\" }," \
--vtail " { 0, NULL, NULL }\n };\n\n if (g_once_init_enter (&id)) {\n GType tmp = g_@type@_register_static (\"@EnumName@\", values);\n g_once_init_leave (&id, tmp);\n }\n\n return (GType) id;\n}" \
$^ > gstenumtypes.c
%.c.gcov: .libs/libgstreamer_@GST_API_VERSION@_la-%.gcda %.c
$(GCOV) -b -f -o $^ > $@.out
gcov: $(libgstreamer_@GST_API_VERSION@_la_SOURCES:=.gcov)
if HAVE_INTROSPECTION
BUILT_GIRSOURCES = Gst-@GST_API_VERSION@.gir
gir_headers=$(patsubst %,$(srcdir)/%, $(libgstreamer_@GST_API_VERSION@include_HEADERS))
gir_headers+=$(patsubst %,$(builddir)/%, $(built_header_make))
gir_headers+=$(patsubst %,$(builddir)/%, gstversion.h)
gir_sources=$(patsubst %,$(srcdir)/%, $(libgstreamer_@GST_API_VERSION@_la_SOURCES))
gir_sources+=$(patsubst %,$(builddir)/%, $(built_source_make))
Gst-@GST_API_VERSION@.gir: $(INTROSPECTION_SCANNER) libgstreamer-@GST_API_VERSION@.la
$(AM_V_GEN)GST_PLUGIN_SYSTEM_PATH_1_0="" GST_PLUGIN_PATH_1_0="" GST_REGISTRY_DISABLE=yes GI_SCANNER_DISABLE_CACHE=yes \
CPPFLAGS="$(CPPFLAGS)" CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)" CC="$(CC)" PKG_CONFIG="$(PKG_CONFIG)" DLLTOOL="$(DLLTOOL)" \
$(INTROSPECTION_SCANNER) -v --namespace Gst \
--nsversion=@GST_API_VERSION@ \
--verbose \
--warn-all \
-I$(top_srcdir) \
-I$(top_builddir) \
-DIN_GOBJECT_INTROSPECTION=1 \
--c-include='gst/gst.h' \
--library=libgstreamer-@GST_API_VERSION@.la \
--include=GLib-2.0 \
--include=GObject-2.0 \
--include=GModule-2.0 \
--libtool="${LIBTOOL}" \
--pkg glib-2.0 \
--pkg gobject-2.0 \
--pkg gmodule-no-export-2.0 \
--pkg-export gstreamer-@GST_API_VERSION@ \
--add-init-section="$(INTROSPECTION_INIT)" \
--output $@ \
$(gir_headers) \
$(gir_sources)
# INTROSPECTION_GIRDIR/INTROSPECTION_TYPELIBDIR aren't the right place to
# install anything - we need to install inside our prefix.
girdir = $(datadir)/gir-1.0
gir_DATA = $(BUILT_GIRSOURCES)
typelibsdir = $(libdir)/girepository-1.0/
typelibs_DATA = $(BUILT_GIRSOURCES:.gir=.typelib)
%.typelib: %.gir $(INTROSPECTION_COMPILER)
$(AM_V_GEN)$(INTROSPECTION_COMPILER) --includedir=$(srcdir) --includedir=$(builddir) $(INTROSPECTION_COMPILER_OPTS) $< -o $(@F)
CLEANFILES += $(BUILT_GIRSOURCES) $(typelibs_DATA)
endif
# try to prevent packaging errors
check-libexecdir-consistency:
@if test "${GST_PLUGIN_SCANNER_INSTALLED}" != "${libexecdir}/gstreamer-$(GST_API_VERSION)/gst-plugin-scanner"; then \
echo "*** Inconsistent libexecdir! Please use ./configure --libexecdir=/foo/bar"; \
echo "*** to set the libexecdir and not make libexecdir=/foo/bar or the like."; \
echo "*** The same goes for prefix, libdir etc."; \
echo "*** ${GST_PLUGIN_SCANNER_INSTALLED} != ${libexecdir}/gstreamer-$(GST_API_VERSION)/gst-plugin-scanner"; \
exit 1; \
fi
all-local: check-libexecdir-consistency
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