[FFmpeg-cvslog] configure: Silence error messages when probing compiler

[Shiz]

ffmpeg | branch: master | Shiz <hi at shiz.me> | Mon Aug  3 12:44:44 2015 +0200| [b197f78329615893201c0e241d00b71b7c749dbb] | committer: Luca Barbato

configure: Silence error messages when probing compiler

On Xcode's clang on OS X, $cc --version will output a 'Configured with:'
line to stderr, which clobbers the configure script output. As this line
serves no further purpose, it should be silenced.

The same applies to apple-gcc 4.2.1, which complains that it can not
understand the kernel version it is running on.

Signed-off-by: Luca Barbato <lu_zero at gentoo.org>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b197f78329615893201c0e241d00b71b7c749dbb
---

 configure |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure b/configure
index 482be43..2c3e77a 100755
--- a/configure
+++ b/configure
@@ -2939,8 +2939,8 @@ probe_cc(){
 
     if $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
         _type=llvm_gcc
-        gcc_extra_ver=$(expr "$($_cc --version | head -n1)" : '.*\((.*)\)')
-        _ident="llvm-gcc $($_cc -dumpversion) $gcc_extra_ver"
+        gcc_extra_ver=$(expr "$($_cc --version 2>/dev/null | head -n1)" : '.*\((.*)\)')
+        _ident="llvm-gcc $($_cc -dumpversion 2>/dev/null) $gcc_extra_ver"
         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
         _cflags_speed='-O3'
         _cflags_size='-Os'
@@ -3003,7 +3003,7 @@ probe_cc(){
         _flags_filter=tms470_flags
     elif $_cc -v 2>&1 | grep -q clang; then
         _type=clang
-        _ident=$($_cc --version | head -n1)
+        _ident=$($_cc --version 2>/dev/null | head -n1)
         _depflags='-MMD -MF $(@:.o=.d) -MT $@'
         _cflags_speed='-O3'
         _cflags_size='-Os'