re PR other/45915 (Check for gnu_unique_object in ld.so in gcc/configure.ac is…

re PR other/45915 (Check for gnu_unique_object in ld.so in gcc/configure.ac is broken for non-glibc ldd)

	PR other/45915
	* configure.ac (gcc_cv_as_gnu_unique_object): Only use ldd
	--version output if supported.
	* configure: Regenerate.

From-SVN: r168546

gcc/ChangeLog

+2011-01-06  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	PR other/45915
+	* configure.ac (gcc_cv_as_gnu_unique_object): Only use ldd
+	--version output if supported.
+	* configure: Regenerate.
+
 2011-01-06  Joseph Myers  <joseph@codesourcery.com>
 
 	* config/linux-android.opt (tno-android-cc, tno-android-ld): New

gcc/configure

@@ -25207,6 +25207,7 @@ $as_echo "$gcc_cv_as_gnu_unique_object" >&6; }
 if test $gcc_cv_as_gnu_unique_object = yes; then
   # Also check for ld.so support, i.e. glibc 2.11 or higher.
    if test x$host = x$build -a x$host = x$target &&
+       ldd --version 2>/dev/null &&
        glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
       glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
       glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`

gcc/configure.ac

@@ -2,7 +2,7 @@
 # Process this file with autoconf to generate a configuration script.
 
 # Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
-# 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+# 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
 
 #This file is part of GCC.
 
@@ -3885,6 +3885,7 @@ Valid choices are 'yes' and 'no'.]) ;;
    [.type foo, @gnu_unique_object],,
 # Also check for ld.so support, i.e. glibc 2.11 or higher.
    [[if test x$host = x$build -a x$host = x$target &&
+       ldd --version 2>/dev/null &&
        glibcver=`ldd --version 2>/dev/null | sed 's/.* //;q'`; then
       glibcmajor=`expr "$glibcver" : "\([0-9]*\)"`
       glibcminor=`expr "$glibcver" : "[2-9]*\.\([0-9]*\)"`