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

[Shiz]

ffmpeg | branch: master | Shiz <hi at shiz.me> | Mon Aug  3 12:20:59 2015 +0200| [2480da12a41edc084a7b697187ef1844fb6779a5] | committer: Michael Niedermayer

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.

Reviewed-by: Carl Eugen Hoyos <cehoyos at ag.or.at>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2480da12a41edc084a7b697187ef1844fb6779a5
---

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

diff --git a/configure b/configure
index 0f126bd..124b87f 100755
--- a/configure
+++ b/configure
@@ -3551,8 +3551,8 @@ probe_cc(){
         true # no-op to avoid reading stdin in following checks
     elif $_cc -v 2>&1 | grep -q '^gcc.*LLVM'; then
         _type=llvm_gcc
-        gcc_extra_ver=$(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'
@@ -3616,7 +3616,7 @@ 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'