On Sun, Mar 26, 2017 at 06:17:57PM -0400, Ronald S. Bultje wrote: [...] > > I'll improve the message, but basically the djgpp libc can be configured > > to be POSIX only, where these functions functions and macro (pow2, PI) are > > not defined. We could do that in the configure (-D_POSIX_SOURCE). > > > > Unfortunately, DJGPP does not have posix_memalign(), and will lack its own > > memalign function we use in lavu/mem.c if we use -D_POSIX_SOURCE. (we > > could use the recently defunct memalign hack, but better use the proper > > allocation function). > > > I'm not sure I understand. The user might have installed djgpp instead of > libc. But we have no influence whatsoever over how the user compiled djgpp, > so FFmpeg should work with as well as without a posix-compiled djgpp, right? >
pow2() and memalign() prototypes and macros like PI are exposed conditionally in their respective headers. So if you have _POSIX_SOURCE defined in your code and include math.h or stdlib.h, you will not see these symbols (even though they are present in the djgpp libc). -- Clément B.
signature.asc
Description: PGP signature
_______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
