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avutil/utils: check that size_t is unsigned

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ANSI/ISO C guarantee this, yet there is evidence that there exist
platforms where its not so.
See: http://www.cs.utah.edu/dept/old/texinfo/glibc-manual-0.02/library_30.html

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-10-26 22:08:06 +02:00
parent c78a416985
commit f3d0642d35
1 changed files with 2 additions and 0 deletions
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libavutil/utils.c
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@ -40,6 +40,8 @@ unsigned avutil_version(void)
av_assert0(LIBAVUTIL_VERSION_MICRO >= 100);
av_assert0(HAVE_MMX2 == HAVE_MMXEXT);
av_assert0(((size_t)-1) > 0); // C gurantees this but if false on a platform we care about revert at least b284e1ffe343d6697fb950d1ee517bafda8a9844
if (av_sat_dadd32(1, 2) != 5) {
av_log(NULL, AV_LOG_FATAL, "Libavutil has been build with a broken binutils, please upgrade binutils and rebuild\n");
abort();