[FFmpeg-devel] [PATCH 7/8] build: simplify weak-enabling of autodetected libraries

Michael Niedermayer michael at niedermayer.cc
Fri Jul 28 23:28:29 EEST 2017

On Fri, Jul 28, 2017 at 01:51:44PM +0200, Clément Bœsch wrote:
> From: Clément Bœsch <cboesch at gopro.com>
> ---
>  configure | 18 +++---------------
>  1 file changed, 3 insertions(+), 15 deletions(-)

breaks mingw64 build

configure --cc='ccache x86_64-w64-mingw32-gcc'   --enable-xmm-clobber-test  --samples=/home/michael/fatesamples/fate/fate-suite/ --arch=x86_64 --target-os=mingw32 --cross-prefix=x86_64-w64-mingw32- --enable-gpl --target_exec=wine

src/libavdevice/sdl2.c:26:17: fatal error: SDL.h: No such file or directory
 #include <SDL.h>
compilation terminated.
CC      libavdevice/utils.o
make: *** [libavdevice/sdl2.o] Error 1
make: *** Waiting for unfinished jobs....
src/libavdevice/dshow.c: In function ‘dshow_show_filter_properties’:
src/libavdevice/dshow.c:516:5: warning: missing braces around initializer [-Wmissing-braces]
     FILTER_INFO filter_info = {0}; /* a warning on this line is false positive GCC bug 53119 AFAICT */
src/libavdevice/dshow.c:516:5: warning: (near initialization for ‘filter_info.achName’) [-Wmissing-braces]


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Awnsering whenever a program halts or runs forever is
On a turing machine, in general impossible (turings halting problem).
On any real computer, always possible as a real computer has a finite number
of states N, and will either halt in less than N cycles or never halt.
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