PSPP-BUG: Problem configuring on Slackware

[Frans Houweling]

Hi,
   this is probably not a bug - I am just hoping for you to help me:
> ..
> checking whether gcc -std=gnu99 accepts -fgnu89-inline... yes
> ..
> checking whether <wchar.h> uses 'inline' correctly... no
> configure: error: <wchar.h> cannot be used with this compiler (gcc 
> -std=gnu99 -g -O2  -pthread -I/usr/include/cairo 
> -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include 
> -I/usr/include/pixman-1 -I/usr/include/freetype2 
> -I/usr/include/libpng14 -I/usr/include/libdrm -I/usr/include/pango-1.0  ).
> This is a known interoperability problem of glibc <= 2.5 with gcc >= 
> 4.3 in
> C99 mode. You have four options:
>   - Add the flag -fgnu89-inline to CC and reconfigure, or
>   - Fix your include files, using parts of
> <http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=b037a293a48718af30d706c2e18c929d0e69a621>, 
> or
>   - Use a gcc version older than 4.3, or
>   - Don't use the flags -std=c99 or -std=gnu99.
> Configuration aborted.

I tried the first option with no luck (same error) - the other ones are 
beyond my powers.
The reason for disturbing you is that my glibc version appears > 2.5
> pspp-0.8.5$ ls /var/log/packages/ | grep glibc
> glibc-2.17-x86_64-10_slack14.1
> spp-0.8.5$ ls /var/log/packages/ | grep gcc
> gcc-4.8.2-x86_64-1

Should I wait for Slackware 15?
Thanks
frans