[FFmpeg-devel] [PATCH] Add log2 check to configure and equivalent to internal.h

[Måns Rullgård]

Alex Converse <alex.converse at gmail.com> writes:

> Hi,
>
> If someone on a system without log2 could test this, that would be great.
>
> Regards,
> Alex Converse
>
> diff --git a/configure b/configure
> index 7998273..48630f1 100755
> --- a/configure
> +++ b/configure
> @@ -911,6 +911,7 @@ HAVE_LIST="
>      libdc1394_1
>      libdc1394_2
>      llrint
> +    log2
>      loongson
>      lrint
>      lrintf
> @@ -2078,7 +2079,7 @@ check_lib math.h sin -lm
>  check_lib va/va.h vaInitialize -lva
>  
>  # test for C99 functions in math.h
> -for func in llrint lrint lrintf round roundf truncf; do
> +for func in log2 llrint lrint lrintf round roundf truncf; do
>      check_exec <<EOF && enable $func || disable $func
>  #include <math.h>
>  int main(void) { return ($func(3.999f) > 0)?0:1; }

What's with that weird runtime check anyway?  Looks pretty useless to
me.

-- 
M?ns Rullg?rd
mans at mansr.com