Generate .la for internal libav libraries

This should help libtool in getting the internal linking right.
Effectively, libtool can sometime get the link order wrong when
presented with a mix of .la and -l arguments. These .la file are
also required by the android build system and were previously
created by cerbero.

configure.ac

@@ -314,17 +314,17 @@ else
                 -I \$(top_builddir)/gst-libs/ext/libav \
                  -Wno-deprecated-declarations"
 
-  LIBAV_DEPS="\$(top_builddir)/gst-libs/ext/libav/libavformat/libavformat.a \
+  LIBAV_DEPS="\$(top_builddir)/gst-libs/ext/libav/libavfilter/libavfilter.a \
+              \$(top_builddir)/gst-libs/ext/libav/libavformat/libavformat.a \
               \$(top_builddir)/gst-libs/ext/libav/libavcodec/libavcodec.a \
-              \$(top_builddir)/gst-libs/ext/libav/libavfilter/libavfilter.a \
               \$(top_builddir)/gst-libs/ext/libav/libswresample/libswresample.a \
               \$(top_builddir)/gst-libs/ext/libav/libavutil/libavutil.a"
 
-  LIBAV_LIBS="-L\$(top_builddir)/gst-libs/ext/libav/libavformat -lavformat \
-              -L\$(top_builddir)/gst-libs/ext/libav/libavcodec -lavcodec \
-              -L\$(top_builddir)/gst-libs/ext/libav/libswresample -lswresample \
-              -L\$(top_builddir)/gst-libs/ext/libav/libavutil -lavutil \
-              -L\$(top_builddir)/gst-libs/ext/libav/libavfilter -lavfilter"
+  LIBAV_LIBS="$ac_pwd/gst-libs/ext/libavfilter.la \
+              $ac_pwd/gst-libs/ext/libavformat.la \
+              $ac_pwd/gst-libs/ext/libavcodec.la \
+              $ac_pwd/gst-libs/ext/libswresample.la \
+              $ac_pwd/gst-libs/ext/libavutil.la"
 
   dnl
   SWSCALE_CFLAGS="-I \$(top_srcdir)/gst-libs/ext/libav \

ext/libav/Makefile.am

@@ -1,17 +1,5 @@
 plugin_LTLIBRARIES = libgstlibav.la
 
-if HAVE_BZ2
-    BZ2_LIBS = -lbz2
-else
-    BZ2_LIBS =
-endif
-
-if HAVE_LZMA
-    LZMA_LIBS = -llzma
-else
-    LZMA_LIBS =
-endif
-
 libgstlibav_la_SOURCES = gstav.c	\
 			  gstavprotocol.c	\
 			  gstavcodecmap.c	\
@@ -34,23 +22,17 @@ libgstlibav_la_LIBTOOLFLAGS = $(GST_PLUGIN_LIBTOOLFLAGS)
 libgstlibav_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) \
 	-lgstaudio-$(GST_API_VERSION) -lgstvideo-$(GST_API_VERSION) \
 	-lgstpbutils-$(GST_API_VERSION) $(GST_BASE_LIBS) \
-	 $(LIBAV_LIBS) $(LIBM) $(WIN32_LIBS) -lz $(BZ2_LIBS) $(LZMA_LIBS)
+	 $(LIBAV_LIBS) $(WIN32_LIBS)
 libgstlibav_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) $(DARWIN_LDFLAGS)
 
 if HAVE_LIBAV_UNINSTALLED
 libgstlibav_la_DEPENDENCIES = $(LIBAV_DEPS)
 
-if GST_PLUGIN_BUILD_STATIC
-depsdir = $(libdir)
-deps_DATA = $(LIBAV_DEPS)
-
-libgstlibav_la = $(DESTDIR)$(plugindir)/libgstlibav.la
-
-install-data-hook: 
-	$(AM_V_at)cp $(libgstlibav_la) $(libgstlibav_la).tmp
-	$(AM_V_GEN)sed -e "s|-L$(top_builddir)/gst-libs/ext/libav/lib[a-z]* ||g" \
-				   $(libgstlibav_la).tmp > $(libgstlibav_la) && rm $(libgstlibav_la).tmp
-endif
+# FIXME: For some reason libtool ignores libavfilter.la, add it
+install-data-hook:
+	$(AM_V_at)cd $(DESTDIR)$(plugindir) \
+		&& sed -e "s|\($(libdir)/libavformat.la\)|$(libdir)/libavfilter.la \1|" \
+		libgstlibav.la > libgstlibav.la.tmp && cp libgstlibav.la.tmp libgstlibav.la && rm libgstlibav.la.tmp
 endif
 
 

gst-libs/ext/Makefile.am

@@ -14,12 +14,106 @@ TMP_DIST_DIR=libav-dist
 DIST_DIR=$(TMP_DIST_DIR)/.libav
 EXTRA_DIST=Makefile.am
 MAINTAINERCLEANDIRS = $(DIST_SUBDIRS)
+LIB_LIST=libavutil libswresample libavcodec libavformat libavfilter
 
-all-local:
+if HAVE_BZ2
+    BZ2_LIBS = -lbz2
+else
+    BZ2_LIBS =
+endif
+
+if HAVE_LZMA
+    LZMA_LIBS = -llzma
+else
+    LZMA_LIBS =
+endif
+
+
+define create_la
+echo "  GEN      $1.la" && \
+(echo "# $1.la - a libtool library file" && \
+ echo "# Generated by libtool (GNU libtool) 2.4.6" && \
+ echo "dlname=''" && \
+ echo "library_names=''" && \
+ echo "old_library='$1.a'" && \
+ echo "inherited_linker_flags=''" && \
+ echo "dependency_libs=' -L$(libdir) $(if $2,$(foreach dep,$2,$(abs_builddir)/$(dep).la)) $3 $(LIBM) '" && \
+ echo "weak_library_names=''" &&  \
+ echo "current=" && \
+ echo "age=" && \
+ echo "revision=" && \
+ echo "installed=no" && \
+ echo "shouldnotlink=no" && \
+ echo "dlopen=''" && \
+ echo "dlpreopen=''" && \
+ echo "libdir='$(libdir)'") > $1.la
+endef
+
+libavutil.la:
+	$(AM_V_at)$(call create_la,libavutil)
+
+libswresample.la:
+	$(AM_V_at)$(call create_la,libswresample,libavutil)
+
+libavcodec.la:
+	$(AM_V_at)$(call create_la,libavcodec,libswresample libavutil,-lz $(LZMA_LIBS))
+
+libavformat.la:
+	$(AM_V_at)$(call create_la,libavformat,libavcodec libavutil,$(LIBM) -lz $(BZ2_LIBS))
+
+libavfilter.la:
+	$(AM_V_at)$(call create_la,libavfilter,libavformat libavcodec libswresample libavutil)
+
+all-local: $(foreach lib,$(LIB_LIST),$(lib).la)
 	cd libav && $(MAKE)
+	$(AM_V_at)$(MKDIR_P) .libs
+	$(AM_V_at)for lib in $(LIB_LIST); do \
+		if ! test -f .libs/$${lib}.a; then \
+		  echo "  CP       $${lib}"; \
+		  cp libav/$${lib}/$${lib}.a .libs/$${lib}.a; \
+		fi; \
+	done
+
+if GST_PLUGIN_BUILD_STATIC
+
+define install_la
+echo " INSTALL  $1.la" && \
+sed -e "s|$(abs_builddir)|$(libdir)|g" \
+	-e "s|installed=no|installed=no|" \
+	$1.la > $(DESTDIR)$(libdir)/$1.la
+endef
+
+# Normally DATA is built before am-local, fix it
+.libs/libavutil.a: all-local
+
+.libs/libswresample.a: all-local
+
+.libs/libavcodec.a: all-local
+
+.libs/libavformat.a: all-local
+
+.libs/libavfilter.a: all-local
+
+depsdir = $(libdir)
+nodist_deps_DATA = \
+	.libs/libavutil.a \
+	.libs/libswresample.a \
+	.libs/libavcodec.a \
+	.libs/libavformat.a \
+	.libs/libavfilter.a
+
+install-data-hook: 
+	$(AM_V_at)$(call install_la,libavutil)
+	$(AM_V_at)$(call install_la,libswresample)
+	$(AM_V_at)$(call install_la,libavcodec)
+	$(AM_V_at)$(call install_la,libavformat)
+	$(AM_V_at)$(call install_la,libavfilter)
+endif
 
 clean-local:
 	cd libav && $(MAKE) clean
+	rm -rf .libs
+	rm -r *.la
 
 dist-clean:
 	cd libav && $(MAKE) distclean