[SCM] libav/experimental: Stricter check for math.h functions

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 33bd38dbd3f5d8c06c6229f6f404ba664027a618
Author: Måns Rullgård <mans at mansr.com>
Date:   Wed Feb 10 22:14:28 2010 +0000

    Stricter check for math.h functions
    
    GCC is sometimes able to optimise constant calls to these functions,
    incorrectly indicating that they exist.  Unoptimised calls will then
    fail to link.
    
    Originally committed as revision 21749 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/configure b/configure
index f324e17..b28b468 100755
--- a/configure
+++ b/configure
@@ -675,7 +675,8 @@ check_mathfunc(){
     disable $func
     check_ld "$@" <<EOF && enable $func
 #include <math.h>
-int main(void){ $func(0); return 0; }
+float foo(float f) { return $func(f); }
+int main(void){ return 0; }
 EOF
 }
 

-- 
Libav/FFmpeg packaging