2 files changed, 14 insertions, 4 deletions
diff --git a/lto-plugin/ChangeLog b/lto-plugin/ChangeLog
index aa98f64f5a3d..345f2b2784ed 100644
--- a/lto-plugin/ChangeLog
+++ b/lto-plugin/ChangeLog
@@ -1,3 +1,7 @@
+2011-12-19  Andreas Schwab  <schwab@linux-m68k.org>
+
+	* configure: Regenerate.
+
 2011-11-21  Andreas Tobler  <andreast@fgznet.ch>
 
 	* configure: Regenerate.
diff --git a/lto-plugin/configure b/lto-plugin/configure
index 48b414e99f74..fab5ef9a6c73 100755
--- a/lto-plugin/configure
+++ b/lto-plugin/configure
@@ -4043,7 +4043,13 @@ fi
 
 ac_lto_plugin_warn_cflags=
 save_CFLAGS="$CFLAGS"
-for option in -Wall; do
+for real_option in -Wall; do
+  # Do the check with the no- prefix removed since gcc silently
+  # accepts any -Wno-* option on purpose
+  case $real_option in
+    -Wno-*) option=-W`expr $real_option : '-Wno-\(.*\)'` ;;
+    *) option=$real_option ;;
+  esac
   as_acx_Woption=`$as_echo "acx_cv_prog_cc_warning_$option" | $as_tr_sh`
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports $option" >&5
@@ -4075,7 +4081,7 @@ eval ac_res=\$$as_acx_Woption
 	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
 $as_echo "$ac_res" >&6; }
   if test `eval 'as_val=${'$as_acx_Woption'};$as_echo "$as_val"'` = yes; then :
-  ac_lto_plugin_warn_cflags="$ac_lto_plugin_warn_cflags${ac_lto_plugin_warn_cflags:+ }$option"
+  ac_lto_plugin_warn_cflags="$ac_lto_plugin_warn_cflags${ac_lto_plugin_warn_cflags:+ }$real_option"
 fi
   done
 CFLAGS="$save_CFLAGS"
@@ -10538,7 +10544,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10541 "configure"
+#line 10547 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10644,7 +10650,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10647 "configure"
+#line 10653 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H