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-rw-r--r--Makefile.target2
-rwxr-xr-xconfigure2
2 files changed, 2 insertions, 2 deletions
diff --git a/Makefile.target b/Makefile.target
index 2464484012..2e8e0a0eef 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -73,7 +73,7 @@ endif
PROGS=$(QEMU_PROG)
# We require -O2 to avoid the stack setup prologue in EXIT_TB
-OP_CFLAGS := -Wall -O2 -g -fno-strict-aliasing
+OP_CFLAGS := -Wall -Wundef -O2 -g -fno-strict-aliasing
# cc-option
# Usage: OP_CFLAGS+=$(call cc-option, -falign-functions=0, -malign-functions=0)
diff --git a/configure b/configure
index 0868ade649..a166133ab6 100755
--- a/configure
+++ b/configure
@@ -346,7 +346,7 @@ for opt do
done
# default flags for all hosts
-CFLAGS="$CFLAGS -Wall -O2 -g -fno-strict-aliasing"
+CFLAGS="$CFLAGS -Wall -Wundef -O2 -g -fno-strict-aliasing"
LDFLAGS="$LDFLAGS -g"
if test "$werror" = "yes" ; then
CFLAGS="$CFLAGS -Werror"