[FFmpeg-devel] [PATCH] Use _snprintf for mingw build
Mon Oct 15 06:51:16 CEST 2007
2007/10/15, Fred Rothganger <fred at rothganger.org>:
> I am compiling ffmpeg under cygwin with -mno-cygwin, and then linking
> the resulting static libs under MSVC 2005 edition. There are three
> symbols that remain undefined at link time:
> This patch addresses _snprintf. The following two patches will address
> the other issues. If someone knows of a better solution, please tell
> me. Otherwise, please consider applying these patches.
I don't think MSVC is a supported platform. Furthermore MS's _snprintf
isn't the same as snprintf: the result of the former isn't guaranteed
to be zero terminated.
> Index: internal.h
> --- internal.h (revision 10737)
> +++ internal.h (working copy)
> @@ -259,6 +259,14 @@
> #define fprintf please_use_av_log
> +// Hack to rename certain standard C functions to link with MSVC runtime.
> +#if defined(__MINGW32__)
Actually MinGW runtime has provided a sane snprintf.
> +#undef snprintf
> +#define snprintf _snprintf
> #define CHECKED_ALLOCZ(p, size)\
> p= av_mallocz(size);\
Beauty is truth,
While truth is beauty.
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