1 files changed, 42 insertions, 2 deletions
diff --git a/lto-plugin/configure b/lto-plugin/configure
index c9c84a1..9815917 100755
--- a/lto-plugin/configure
+++ b/lto-plugin/configure
@@ -622,6 +622,7 @@ EGREP
 GREP
 SED
 LIBTOOL
+ac_lto_plugin_warn_cflags
 am__fastdepCC_FALSE
 am__fastdepCC_TRUE
 CCDEPMODE
@@ -4040,6 +4041,45 @@ rm -rf conftest*
   fi
 fi
 
+ac_lto_plugin_warn_cflags=
+save_CFLAGS="$CFLAGS"
+for option in -Wall; do
+  as_acx_Woption=`$as_echo "acx_cv_prog_cc_warning_$option" | $as_tr_sh`
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports $option" >&5
+$as_echo_n "checking whether $CC supports $option... " >&6; }
+if { as_var=$as_acx_Woption; eval "test \"\${$as_var+set}\" = set"; }; then :
+  $as_echo_n "(cached) " >&6
+else
+  CFLAGS="$option"
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  eval "$as_acx_Woption=yes"
+else
+  eval "$as_acx_Woption=no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+fi
+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"
+fi
+  done
+CFLAGS="$save_CFLAGS"
+
 case `pwd` in
   *\ * | *\	*)
     { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&5
@@ -10498,7 +10538,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10501 "configure"
+#line 10541 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10604,7 +10644,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10607 "configure"
+#line 10647 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H