[FFmpeg-cvslog] configure: add filtering of linker flags

[Mans Rullgard]

ffmpeg | branch: master | Mans Rullgard <mans at mansr.com> | Fri Jul 20 03:06:49 2012 +0100| [64933b6c94dc6dd4c52078c2bf3863bdaf083cf2] | committer: Mans Rullgard

configure: add filtering of linker flags

This allows filtering of linker flags the same was as already
supported for CFLAGS.  The filter must be initialised to 'echo'
early since it is invoked by --extra-ldflags.

Signed-off-by: Mans Rullgard <mans at mansr.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=64933b6c94dc6dd4c52078c2bf3863bdaf083cf2
---

 configure |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 4907c75..9692921 100755
--- a/configure
+++ b/configure
@@ -597,11 +597,11 @@ add_asflags(){
 }
 
 add_ldflags(){
-    append LDFLAGS "$@"
+    append LDFLAGS $($ldflags_filter "$@")
 }
 
 add_extralibs(){
-    prepend extralibs "$@"
+    prepend extralibs $($ldflags_filter "$@")
 }
 
 check_cmd(){
@@ -657,6 +657,8 @@ check_ld(){
         test "${f}" = "${f#-l}" && flags="$flags $f" || libs="$libs $f"
     done
     check_cc $($cflags_filter $flags) || return
+    flags=$($ldflags_filter $flags)
+    libs=$($ldflags_filter $libs)
     check_cmd $ld $LDFLAGS $flags -o $TMPE $TMPO $libs $extralibs
 }
 
@@ -1706,6 +1708,8 @@ LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
 SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
 SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
 
+ldflags_filter=echo
+
 AS_O='-o $@'
 CC_O='-o $@'