From: Pekka Pessi <[email protected]>
Do not add warning flag if corresponding or opposite option is already
in CFLAGS.
---
acinclude.m4 | 22 +++++++++++++++-------
1 files changed, 15 insertions(+), 7 deletions(-)
diff --git a/acinclude.m4 b/acinclude.m4
index 84086fd..fcfb132 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -15,13 +15,21 @@ AC_DEFUN([COMPILER_FLAGS], [
CFLAGS="-Wall -O2 -D_FORTIFY_SOURCE=2"
fi
if (test "$USE_MAINTAINER_MODE" = "yes"); then
- CFLAGS+=" -Werror -Wextra"
- CFLAGS+=" -Wno-unused-parameter"
- CFLAGS+=" -Wno-missing-field-initializers"
- CFLAGS+=" -Wdeclaration-after-statement"
- CFLAGS+=" -Wmissing-declarations"
- CFLAGS+=" -Wredundant-decls"
- CFLAGS+=" -Wcast-align"
+ for flag in \
+ -Werror -Wextra \
+ -Wno-unused-parameter \
+ -Wno-missing-field-initializers \
+ -Wdeclaration-after-statement \
+ -Wmissing-declarations \
+ -Wredundant-decls \
+ -Wcast-align
+ do
+ neg=`echo $flag | sed 's/^-Wno-/-W/;t;s/^-W/-Wno-/'`
+ case " $CFLAGS " in
+ *" $flag "* | *" $neg "* ) ;;
+ * ) CFLAGS="$CFLAGS $flag" ;;
+ esac
+ done
fi
])
--
1.7.0.4
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