[FFmpeg-devel] compile issues under mingw-cross-env

[John Calcote]

Anyone ever tried compiling ffmpeg under mingw-cross-env
(http://www.nongnu.org/mingw-cross-env/)? I've been playing with it and
I've found the following issues with CPPFLAGS in the generated config.mak:

1) I had to change -std=c99 to -std=gnu99 because _STRICT_ANSI is
enabled if -std=c99 is used which means functions like strcasecmp aren't
available (at least the prototypes aren't).

2) I had to remove the definition of _POSIX_C_SOURCE=200112 because
defining it causes pid_t to not be defined in sched.h.

I used the following command line to configure:

$ configure --enable-postproc --enable-gpl --enable-x11grab
--enable-pthreads --enable-nonfree --enable-libvorbis
--target-os=mingw32 --enable-memalign-hack --arch=x86_64
--cross-prefix=i686-pc-mingw32-

Note this is a 64-bit windows build (arch=x86_64).

After making these changes in the generated config.mak file, ffmpeg and
utilities compiled - not cleanly, mind you, but at least as cleanly as
it does in normal non-cross builds.

Any comments would be appreciated. Perhaps I'm doing something
fundamentally wrong in my cross compile?

Thanks in advance,
John