From: Matthias Ringwald <mringwal@inf.ethz.ch>
Date: Fri, 21 Mar 2008 13:47:22 +0100
Subject: Don't create self-referencing symlinks for makefiles

FFMPEG's configure script is called from contrib/Makefile.am with an
absolute path which makes it believe that it is configured for src_dir !=
build_dir and then creates symlinks in the build_dir which point to the
corresponding Makefile in the src_dir. As they are identical, the Makefile
is replaced by a symlink to itself.

--- a/contrib/Makefile.am	2008-03-21 13:39:53.000000000 +0100
+++ a/contrib/Makefile-new.am	2008-03-21 13:29:46.000000000 +0100
@@ -110,11 +110,8 @@
 	export FFMPEG_CONFIGURE_OPTIONS="$(all_configure_options)";				\
 	$(ffmpeg_builder) -configure "$(srcdir)/ffmpeg" $(UNIVERSAL_ARCHES)
 else
-	mkdir -p ffmpeg
-	cd ffmpeg; \
-	$(srcdir)/ffmpeg/configure $(all_configure_options) \
-		--extra-cflags="$(VISIBILITY_FLAG) $(FFMPEG_EXTRA_CFLAGS)"; \
-	cd ..
+	cd ffmpeg; ./configure $(all_configure_options) \
+		--extra-cflags="$(VISIBILITY_FLAG) $(FFMPEG_EXTRA_CFLAGS)"; 
 if HOST_OS_DARWIN
 	if what /usr/bin/ld | grep -q ld64-77; then \
 		cat ffmpeg/config.mak | sed -e '/OPTFLAGS=/s/-mdynamic-no-pic//g' > ffmpeg/config.tmp; \