[FFmpeg-cvslog] configure: silence preprocessor noise from dependency generation

[Ganesh Ajjanagadde]

ffmpeg | branch: master | Ganesh Ajjanagadde <gajjanagadde at gmail.com> | Fri Sep 18 15:28:47 2015 -0400| [8d1226e623b270969a04e455a14ed036dc8466bc] | committer: Michael Niedermayer

configure: silence preprocessor noise from dependency generation

Currently, errors are thrown for various macros while building that are completely bogus.
They occur during the dependency (.d) generation phase, and have no bearing on the compiled output,
since only the stdout is piped into the sed command to generate the .d files.
They basically occur as the relevant -I paths are not (and cannot be passed) during
the dependancy generation phase.
As such, this patch silences them.

Signed-off-by: Ganesh Ajjanagadde <gajjanagadde at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8d1226e623b270969a04e455a14ed036dc8466bc
---

 configure |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index 3ee1ed2..305e756 100755
--- a/configure
+++ b/configure
@@ -2980,7 +2980,7 @@ target_path='$(CURDIR)'
 
 # since the object filename is not given with the -MM flag, the compiler
 # is only able to print the basename, and we must add the path ourselves
-DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
+DEPCMD='$(DEP$(1)) $(DEP$(1)FLAGS) $($(1)DEP_FLAGS) $< 2>/dev/null | sed -e "/^\#.*/d" -e "s,^[[:space:]]*$(*F)\\.o,$(@D)/$(*F).o," > $(@:.o=.d)'
 DEPFLAGS='-MM'
 
 # find source path