[MacPorts] #48938: ffmpeg build failure on 10.6

[MacPorts]

#48938: ffmpeg build failure on 10.6
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  Reporter:  chilli.namesake@…  |      Owner:  devans@…
      Type:  defect             |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.3.3
Resolution:                     |   Keywords:  snowleopard
      Port:  ffmpeg             |
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Comment (by ryandesign@…):

 Replying to [comment:2 ryandesign@…]:
 > We also had a report of that error with mesa in #46827. In both tickets,
 Jeremy suggested removing "`-Werror=missing-prototypes`" from the build
 system.

 I found [http://ffmpeg.org/pipermail/ffmpeg-devel/2011-April/110848.html a
 report of this type of problem] on the ffmpeg mailing list from four years
 ago. There, the problem file was libavfilter/vf_libopencv.c , and the
 suggestion was to conditionally undefine `__GNUC_STDC_INLINE__` on OS X.
 The thread ends at some point with no indication that the patch was
 applied.

 There was also a reference to the [http://www.openradar.me/8026390
 openradar 8026390] report of this problem.

 I see that a similar strategy is already being used (unconditionally) in
 libavcodec/vda.h:

 {{{
 // emmintrin.h is unable to compile with -std=c99 -Werror=missing-
 prototypes
 // http://openradar.appspot.com/8026390
 #undef __GNUC_STDC_INLINE__
 }}}

 Maybe that is what we should do here instead.

-- 
Ticket URL: <https://trac.macports.org/ticket/48938#comment:3>
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