[PATCH] urxvtd, getopt and mlock

[Russell Harmon]

On Sat, Jan 24, 2009 at 12:53, Emanuele Giaquinta
<emanuele.giaquinta at gmail.com> wrote:
> On Thu, Jan 22, 2009 at 04:02:38PM -0500, Russell Harmon wrote:
>
>> +if test x$support_mlock = xyes; then
>> +    dnl# glibc versions < 2.5.20 don't work with mlockall
>> +    AC_CACHE_CHECK([for glibc >= 2.5], rxvt_mlock,
>> +    [AC_RUN_IFELSE([
>> +      AC_LANG_PROGRAM([
>> +#include <stdlib.h>
>> +      ],[
>> +#if ! ( ( defined(__GLIBC__) && defined(__GLIBC_MINOR__) ) && (
>> __GLIBC__ > 2 || ( __GLIBC__ == 2 && __GLIBC_MINOR__ >= 5 ) ) )
>> +        return 1;
>> +#endif
>> +      ])],
>> +      [],[support_mlock=no]
>> +    )])
>> +fi
>
> Doesn't this check prevent mlockall to be enabled on non glibc systems?
I don't believe so... on a non-glibc system, that statement should resolve to:

#if ! ( ( false && false ) && ( undef > 2 || (undef == 2 && undef >= 5 ) ) )
which becomes
#if ! ( ( false && false ) )
which becomes
#if ! false
which becomes
#if true
which compiles it in.