From 084e2665e2f76ce0106595e62bd31bd33d9c6190 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <ian@airs.com>
Date: Tue, 29 Dec 2009 22:49:13 +0000
Subject: [PATCH] 	* configure.ac: Set the MCMODEL_MEDIUM conditional to
 false if 	using a version of gcc before 4.1. 	* configure: Rebuild.

---
 gold/ChangeLog    |  6 ++++++
 gold/configure    | 27 ++++++++++++++++++++++++++-
 gold/configure.ac | 14 +++++++++++++-
 3 files changed, 45 insertions(+), 2 deletions(-)

diff --git a/gold/ChangeLog b/gold/ChangeLog
index 345ec62669..4e396485dc 100644
--- a/gold/ChangeLog
+++ b/gold/ChangeLog
@@ -1,3 +1,9 @@
+2009-12-29  Ian Lance Taylor  <iant@google.com>
+
+	* configure.ac: Set the MCMODEL_MEDIUM conditional to false if
+	using a version of gcc before 4.1.
+	* configure: Rebuild.
+
 2009-12-28  Chris Demetriou  <cgd@google.com>
 
 	* attributes.cc (Output_attributes_section_data::do_write): Use
diff --git a/gold/configure b/gold/configure
index 1bb2d3dee2..4817e444dc 100755
--- a/gold/configure
+++ b/gold/configure
@@ -6045,7 +6045,32 @@ else
 fi
 
 
- if test "$target_cpu" = "x86_64"; then
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for gcc >= 4.1" >&5
+$as_echo_n "checking for gcc >= 4.1... " >&6; }
+if test "${gold_cv_prog_gcc41+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+#if !defined __GNUC__
+error
+#elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
+error
+#endif
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  gold_cv_prog_gcc41=yes
+else
+  gold_cv_prog_gcc41=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gold_cv_prog_gcc41" >&5
+$as_echo "$gold_cv_prog_gcc41" >&6; }
+
+ if test "$target_cpu" = "x86_64" -a "$gold_cv_prog_gcc41" = "yes"; then
   MCMODEL_MEDIUM_TRUE=
   MCMODEL_MEDIUM_FALSE='#'
 else
diff --git a/gold/configure.ac b/gold/configure.ac
index f279b450a2..7102670ded 100644
--- a/gold/configure.ac
+++ b/gold/configure.ac
@@ -227,8 +227,20 @@ AM_CONDITIONAL(FN_PTRS_IN_SO_WITHOUT_PIC, [
     *) true;;
   esac])
 
+dnl Test for gcc 4.1 or later.  Full support for -mcmodel=medium is
+dnl only available in gcc 4.1.
+AC_CACHE_CHECK([for gcc >= 4.1], [gold_cv_prog_gcc41],
+[AC_COMPILE_IFELSE([
+#if !defined __GNUC__
+error
+#elif __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 1)
+error
+#endif
+], [gold_cv_prog_gcc41=yes], [gold_cv_prog_gcc41=no])])
+
 dnl Whether we can test -mcmodel=medium.
-AM_CONDITIONAL(MCMODEL_MEDIUM, [test "$target_cpu" = "x86_64"])
+AM_CONDITIONAL(MCMODEL_MEDIUM,
+[test "$target_cpu" = "x86_64" -a "$gold_cv_prog_gcc41" = "yes"])
 
 dnl Test for __thread support.
 AC_CACHE_CHECK([for thread support], [gold_cv_c_thread],