Re: strstr is linear test fails on my machine with glibc 2.13

[Eric Blake]

On 07/19/2011 03:45 PM, Bruno Haible wrote:
> Eric Blake wrote:
> > Known glibc bug when using glibc 2.11 or newer on an SSE4.2-enabled chip:
> > http://sourceware.org/bugzilla/show_bug.cgi?id=12100
>
> Unless it is fixed, let's update the comments and cross-compilation guess.
>
>
> @@ -93,13 +93,15 @@
>       return result;
>       ]])],
>           [gl_cv_func_strstr_linear=yes], [gl_cv_func_strstr_linear=no],
> -        [dnl Only glibc>  2.12 and cygwin>  1.7.7 are known to have a
> -         dnl bug-free strstr that works in linear time.
> +        [dnl Only glibc>  2.12 on processors without SSE 4.2 instructions and
> +         dnl cygwin>  1.7.7 are known to have a bug-free strstr that works in
> +         dnl linear time.

>            AC_EGREP_CPP([Lucky user],
>              [
>   #include<features.h>
>   #ifdef __GNU_LIBRARY__
>    #if ((__GLIBC__ == 2&&  __GLIBC_MINOR__>  12) || (__GLIBC__>  2)) \
> +&&  !(defined __i386__ || defined __x86_64__) \

Makes sense to me.

--
Eric Blake   address@hidden    +1-801-349-2682
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