[FFmpeg-devel] [PATCH] fix compilation in cygwin
Mon Jan 11 19:46:37 CET 2010
On Sun Jan 10 21:55:50 2010
Vitor Sessak wrote:
>>>+static av_always_inline av_const float log2f(float x)
>>>+ return log(x) * 1.44269504088896340736;
>>>+#endif /* HAVE_LOG2F */
>>Calling log2() should be better. Most of the bad libs have a full set
>>of double-precision functions. It's the single-precision ones, which
>>were added in C99 that are often missing.
> Fine, even thought NetBSD lacks it (thats why we have a configure
> check for it, so no problem there).
Just for completeness:
log2 log2f exp2 exp2f
FreeBSD - - + +
NetBSD + + - -
DragonFly + + - -
DJGPP +  + -
 provided as a macro which is buried under crappy ifdeferry.
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