Problem with ucred.h building 7.2.1

Hi,

I'm having some trouble compiling 7.2.1 on one of our machines,
It's a linux box running SuSE 6.0, with kernel version 2.2.14.

I'm configuring with:
./configure --enable-locale --enable-multibyte=LATIN1 --with-openssl
(even tried with a clean ./configure)

Compiling goes fine until the hba.c file:
gcc -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../../../src/include -I/usr/local/ssl/include -c crypt.c -o crypt.o
gcc -O2 -Wall -Wmissing-prototypes -Wmissing-declarations -I../../../src/include -I/usr/local/ssl/include -c hba.c -o hba.o
hba.c: In function `ident_unix':
hba.c:885: storage size of `peercred' isn't known
hba.c:885: warning: unused variable `peercred'
make[3]: *** [hba.o] Error 1
make[3]: Leaving directory `/usr/src/postgresql-7.2.1/src/backend/libpq'
make[2]: *** [libpq-recursive] Error 2
make[2]: Leaving directory `/usr/src/postgresql-7.2.1/src/backend'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/usr/src/postgresql-7.2.1/src'
make: *** [all] Error 2

line 885 looks like:
struct ucred peercred;

When inspecting the config.log file I encounter the
following:

configure:5878: checking for struct cmsgcred
configure:5892: gcc -c -O2 -I/usr/local/ssl/include conftest.c 1>&5
configure:5886: sys/ucred.h: No such file or directory
configure: failed program was:
#line 5883 "configure"
#include "confdefs.h"
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/ucred.h>
int main() {
struct cmsgcred sockcred;
; return 0; }
configure:5912: checking for struct fcred
configure:5926: gcc -c -O2 -I/usr/local/ssl/include conftest.c 1>&5
.
.
.
No wonder it couldn't find the storage size of peercred.
After searching the system I see that I do not have the ucred.h
anywhere.
However I find the ucred definition in /usr/include/linux/socket.h as
struct ucred {
__u32 pid;
__u32 uid;
__u32 gid;
};

So does anyone have a workaround this problem? Anyone tried to compile
7.2.1 on a SuSE 6.0? :)
I'm not that thrilled at the idea of installing another dist. on the
machine, as it is up and running a lot of services that is important to me.

Regards,

Niclas Gustafsson