[PATCH] kbuild: add -Wundef to global CFLAGS
A recent change to the aic scsi driver removed two defines to detect
endianness. cpp handles undefined strings as 0. As a result, the test turned
into #if 0 == 0 and the wrong code was selected.
Adding -Wundef to global CFLAGS will catch such errors.
Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
diff --git a/Makefile b/Makefile
index 5185c917..423397f 100644
--- a/Makefile
+++ b/Makefile
@@ -203,7 +203,7 @@
HOSTCC = gcc
HOSTCXX = g++
-HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
+HOSTCFLAGS = -Wall -Wundef -Wstrict-prototypes -O2 -fomit-frame-pointer
HOSTCXXFLAGS = -O2
# Decide whether to build built-in, modular, or both.
@@ -348,7 +348,7 @@
CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
-CFLAGS := -Wall -Wstrict-prototypes -Wno-trigraphs \
+CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-fno-strict-aliasing -fno-common \
-ffreestanding
AFLAGS := -D__ASSEMBLY__