plugin: Explicitly link to BZ2, LZMA and LZ

While all this information is in the .la files, libtool seems to get
confused with ordering in presence of static system libraries. This could
cause missing symbol error at link time. Adding these depenencies explicitly
workaround the issue.

configure.ac

@@ -280,6 +280,9 @@ else
   LIBS=$save_LIBS
   if test "x$HAVE_BZ2" = "xno"; then
     AC_WARN([libbz2 not found, matroska demuxer will not be able to read bz2 tracks])
+    BZ2_LIBS=
+  else
+    BZ2_LIBS="-lbz2"
   fi
 
   dnl *** Check for lzma
@@ -291,6 +294,9 @@ else
   LIBS=$save_LIBS
   if test "x$HAVE_LZMA" = "xno"; then
     AC_WARN([lzma not found, tiff reader will not be able to read lzma files])
+    LZMA_LIBS=
+  else
+    LZMA_LIBS="-llzma"
   fi
 
   dnl libgstlibav.la: include dirs
@@ -465,6 +471,8 @@ AC_SUBST(SWSCALE_CFLAGS)
 AC_SUBST(SWSCALE_DEPS)
 AC_SUBST(SWSCALE_LIBS)
 AC_SUBST(WIN32_LIBS)
+AC_SUBST(BZ2_LIBS)
+AC_SUBST(LZMA_LIBS)
 
 if test x$HAVE_LIBAV_UNINSTALLED = x1; then
   AC_DEFINE(HAVE_LIBAV_UNINSTALLED, [], [Defined if building against uninstalled Libav source])

ext/libav/Makefile.am

@@ -21,7 +21,7 @@ libgstlibav_la_CFLAGS = $(LIBAV_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS)
 libgstlibav_la_LIBADD = $(GST_PLUGINS_BASE_LIBS) \
 	-lgstaudio-$(GST_API_VERSION) -lgstvideo-$(GST_API_VERSION) \
 	-lgstpbutils-$(GST_API_VERSION) $(GST_BASE_LIBS) \
-	 $(LIBAV_LIBS) $(WIN32_LIBS)
+	 $(LIBAV_LIBS) $(WIN32_LIBS) -lz $(BZ2_LIBS) $(LZMA_LIBS)
 libgstlibav_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) $(DARWIN_LDFLAGS)
 
 if HAVE_LIBAV_UNINSTALLED

gst-libs/ext/Makefile.am

@@ -16,19 +16,6 @@ EXTRA_DIST=Makefile.am
 MAINTAINERCLEANDIRS = $(DIST_SUBDIRS)
 LIB_LIST=libavutil libswresample libavcodec libavformat libavfilter
 
-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" && \