[FFmpeg-cvslog] configure: more properly disable header when check_header_oc() fails

[Reimar Döffinger]

On Sun, Apr 06, 2014 at 12:49:31PM +0200, Thilo Borgmann wrote:
> Am 05.04.14 13:48, schrieb Michael Niedermayer:
> > ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sat Apr  5 13:29:28 2014 +0200| [323c049c7e43cb610e3c5ffbe09fc46278808ad5] | committer: Michael Niedermayer
> > 
> > configure: more properly disable header when check_header_oc() fails
> > 
> > This should make no difference currently
> > 
> > Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> > 
> >> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=323c049c7e43cb610e3c5ffbe09fc46278808ad5
> > ---
> > [...]
> 
> 
> configure fails detection for ICC compilers, because giving an .m file does not
> produce an error (this might also be true for the microsoft compiler also
> failing on FATE, I can't check):
> 
> 
> fate at FATE-01:~/FFmpeg$ /opt/intel/composerxe-2011.4.191/bin/intel64/icc
> -D_ISOC99_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
> -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -std=c99 -fomit-frame-pointer
> -pthread -c -o test test.m && echo OK
> icc: warning #10147: no action performed for specified file(s)
> OK

What idiot thought this a good idea...

> I still don't have a better idea how to handle it generically, though.
> Checking with "check_header" at least only fails on Mac OS X >= 10.7 running
> GCC, IIRC.

Trivially: try both .c and .m.