On distros that support 32 and 64bit userspace, we need to look
a bit more broadly for libraries
(taken from Redhat sources for RHEL5 - thanks).
AC_DEFINE_UNQUOTED(KRB5_VERSION, $K5VERS, [Define this as the Kerberos version number])
if test -f $dir/include/gssapi/gssapi_krb5.h -a \
\( -f $dir/lib/libgssapi_krb5.a -o \
+ -f $dir/lib64/libgssapi_krb5.a -o \
+ -f $dir/lib64/libgssapi_krb5.so -o \
-f $dir/lib/libgssapi_krb5.so \) ; then
AC_DEFINE(HAVE_KRB5, 1, [Define this if you have MIT Kerberos libraries])
KRBDIR="$dir"