s3/configure: fix GNU ld version detection with old gcc releases

needed as old gcc releases output everything to stderr, even stdout output from
ld

Fixes #7825

Autobuild-User: Björn Jacke <bj@sernet.de>
Autobuild-Date: Fri Nov 26 20:15:24 CET 2010 on sn-devel-104

diff --git a/source3/configure.in b/source3/configure.in
index 17b5470905e147f0609c9677b97087e69aa82b85..5f81a193ca8ed5e0fb9f48bc5ce11d010ee3308f 100644 (file)
--- a/source3/configure.in
+++ b/source3/configure.in
@@ -222,7 +222,7 @@ dnl Certain versions of GNU ld the default is not to have the
 dnl --allow-shlib-undefined flag defined.  This causes a stackload of
 dnl warnings when building modules.
 if test "$ac_cv_prog_gnu_ld" = "yes"; then
-       ac_cv_gnu_ld_version=`$CC -Wl,-v /dev/null 2>/dev/null | head -1`
+       ac_cv_gnu_ld_version=`$CC -Wl,-v /dev/null 2>&1 < /dev/null | grep "GNU ld"`
        AC_MSG_CHECKING(GNU ld release date)
        changequote(,)dnl
        ac_cv_gnu_ld_date=`echo $ac_cv_gnu_ld_version | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`