From a482e61bd624c71e39c1a06367e303364b3ba153 Mon Sep 17 00:00:00 2001
From: Måns Rullgård <mans@mansr.com>
Date: Sat, 16 Jan 2010 04:49:02 +0000
Subject: Add symbol versioning for shared libraries

Based on patch by Reinhard Tartler <siretart tauware de>

Originally committed as revision 21236 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 configure | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'configure')

diff --git a/configure b/configure
index c9cf2d1839..62a7f987d6 100755
--- a/configure
+++ b/configure
@@ -1561,6 +1561,7 @@ tmpfile TMPE  $EXESUF
 tmpfile TMPH  .h
 tmpfile TMPO  .o
 tmpfile TMPS  .S
+tmpfile TMPV  .ver
 tmpfile TMPSH .sh
 
 unset -f mktemp
@@ -2568,6 +2569,10 @@ check_ldflags -Wl,--as-needed
 check_ldflags '-Wl,-rpath-link,\$(BUILD_ROOT)/libpostproc -Wl,-rpath-link,\$(BUILD_ROOT)/libswscale -Wl,-rpath-link,\$(BUILD_ROOT)/libavfilter -Wl,-rpath-link,\$(BUILD_ROOT)/libavdevice -Wl,-rpath-link,\$(BUILD_ROOT)/libavformat -Wl,-rpath-link,\$(BUILD_ROOT)/libavcodec -Wl,-rpath-link,\$(BUILD_ROOT)/libavutil'
 check_ldflags -Wl,-Bsymbolic
 
+echo "X{};" > $TMPV
+test_ldflags -Wl,--version-script,$TMPV &&
+    append SHFLAGS '-Wl,--version-script,\$(SUBDIR)lib\$(NAME).ver'
+
 if enabled small; then
     check_cflags -Os            # not all compilers support -Os
     optimizations="small"
-- 
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