From c35d2a3a36ce9dc107dfb8ad39b923f413b813ba Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Wed, 21 Nov 2012 12:39:21 -0800
Subject: Use LIBC_LINKER_FEATURE to check -z global support

---
 configure    | 35 ++++++++++++++++++++---------------
 configure.in | 17 ++---------------
 2 files changed, 22 insertions(+), 30 deletions(-)

diff --git a/configure b/configure
index 4b23722b56..e5b1e162b7 100755
--- a/configure
+++ b/configure
@@ -6560,32 +6560,37 @@ fi
 $as_echo "$libc_linker_feature" >&6; }
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -z global" >&5
-$as_echo_n "checking for -z global... " >&6; }
-if ${libc_cv_z_global+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat > conftest.c <<EOF
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for linker that supports -z global" >&5
+$as_echo_n "checking for linker that supports -z global... " >&6; }
+libc_linker_feature=no
+if test x"$gnu_ld" = x"yes"; then
+  libc_linker_check=`$LD -v --help 2>/dev/null | grep "\-z global"`
+  if test -n "$libc_linker_check"; then
+    cat > conftest.c <<EOF
 int _start (void) { return 42; }
 EOF
-if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
-			    -fPIC -shared -o conftest.so conftest.c
-			    -Wl,-z,global -nostdlib
-			    1>&5'
+    if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
+				-Wl,-z,global -nostdlib -nostartfiles
+				-fPIC -shared -o conftest.so conftest.c
+				1>&5'
   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
   (eval $ac_try) 2>&5
   ac_status=$?
   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }; }
-then
+    then
+      libc_linker_feature=yes
+    fi
+    rm -f conftest*
+  fi
+fi
+if test $libc_linker_feature = yes; then
   libc_cv_z_global=yes
 else
   libc_cv_z_global=no
 fi
-rm -f conftest*
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_z_global" >&5
-$as_echo "$libc_cv_z_global" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_linker_feature" >&5
+$as_echo "$libc_linker_feature" >&6; }
 
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fpie" >&5
diff --git a/configure.in b/configure.in
index 2ec07b1e43..55c46ade92 100644
--- a/configure.in
+++ b/configure.in
@@ -1561,21 +1561,8 @@ LIBC_LINKER_FEATURE([-z execstack], [-Wl,-z,execstack],
 		    [libc_cv_z_execstack=yes], [libc_cv_z_execstack=no])
 AC_SUBST(libc_cv_z_execstack)
 
-AC_CACHE_CHECK(for -z global,
-	       libc_cv_z_global, [dnl
-cat > conftest.c <<EOF
-int _start (void) { return 42; }
-EOF
-if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
-			    -fPIC -shared -o conftest.so conftest.c
-			    -Wl,-z,global -nostdlib
-			    1>&AS_MESSAGE_LOG_FD])
-then
-  libc_cv_z_global=yes
-else
-  libc_cv_z_global=no
-fi
-rm -f conftest*])
+LIBC_LINKER_FEATURE([-z global], [-Wl,-z,global],
+		    [libc_cv_z_global=yes], [libc_cv_z_global=no])
 AC_SUBST(libc_cv_z_global)
 
 AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl
-- 
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