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-rw-r--r--config/ChangeLog5
-rw-r--r--config/warnings.m42
2 files changed, 6 insertions, 1 deletions
diff --git a/config/ChangeLog b/config/ChangeLog
index 2d06a8d..1087ad8 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,8 @@
+2011-12-20 Andreas Schwab <schwab@linux-m68k.org>
+
+ * warnings.m4 (ACX_PROG_CC_WARNING_OPTS): Avoid leading dash in
+ expr call.
+
2011-12-19 Andreas Schwab <schwab@linux-m68k.org>
* warnings.m4 (ACX_PROG_CC_WARNING_OPTS)
diff --git a/config/warnings.m4 b/config/warnings.m4
index 292e5a4..b64b594 100644
--- a/config/warnings.m4
+++ b/config/warnings.m4
@@ -32,7 +32,7 @@ for real_option in $1; 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-\(.*\)'` ;;
+ -Wno-*) option=-W`expr x$real_option : 'x-Wno-\(.*\)'` ;;
*) option=$real_option ;;
esac
AS_VAR_PUSHDEF([acx_Woption], [acx_cv_prog_cc_warning_$option])