kbuild: Add extra gcc checks

Commit Message

Borislav Petkov Feb. 20, 2011, 7:39 p.m. UTC

None

Patch

diff --git a/Makefile b/Makefile
index c9c8c8f..03989a1 100644
--- a/Makefile
+++ b/Makefile
@@ -102,6 +102,15 @@  ifeq ("$(origin O)", "command line")
   KBUILD_OUTPUT := $(O)
 endif
 
+ifeq ("$(origin W)", "command line")
+  KBUILD_ENABLE_EXTRA_GCC_CHECKS = 1
+endif
+ifndef KBUILD_ENABLE_EXTRA_GCC_CHECKS
+  KBUILD_ENABLE_EXTRA_GCC_CHECKS = 0
+endif
+
+export KBUILD_ENABLE_EXTRA_GCC_CHECKS
+
 # That's our default target when none is given on the command line
 PHONY := _all
 _all:
@@ -1262,6 +1271,7 @@  help:
 	@echo  '  make O=dir [targets] Locate all output files in "dir", including .config'
 	@echo  '  make C=1   [targets] Check all c source with $$CHECK (sparse by default)'
 	@echo  '  make C=2   [targets] Force check of all c source with $$CHECK'
+	@echo  '  make W=1   [targets] Enable extra gcc checks'
 	@echo  ''
 	@echo  'Execute "make" or "make all" to build all targets marked with [*] '
 	@echo  'For further info see the ./README file'
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 4eb99ab..5bf9f40 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -30,6 +30,33 @@  ldflags-y  :=
 subdir-asflags-y :=
 subdir-ccflags-y :=
 
+# make W=1 settings
+ifdef KBUILD_ENABLE_EXTRA_GCC_CHECKS
+EXTRA_CFLAGS += -Wextra -Wno-unused
+EXTRA_CFLAGS += -Waggregate-return
+EXTRA_CFLAGS += -Wbad-function-cast
+EXTRA_CFLAGS += -Wcast-qual
+EXTRA_CFLAGS += -Wcast-align
+EXTRA_CFLAGS += -Wconversion
+EXTRA_CFLAGS += -Wdisabled-optimization
+EXTRA_CFLAGS += -Wlogical-op
+EXTRA_CFLAGS += -Wmissing-declarations
+EXTRA_CFLAGS += -Wmissing-format-attribute
+EXTRA_CFLAGS += -Wmissing-include-dirs
+EXTRA_CFLAGS += -Wmissing-prototypes
+EXTRA_CFLAGS += -Wnested-externs
+EXTRA_CFLAGS += -Wold-style-definition
+EXTRA_CFLAGS += -Woverlength-strings
+EXTRA_CFLAGS += -Wpacked
+EXTRA_CFLAGS += -Wpacked-bitfield-compat
+EXTRA_CFLAGS += -Wpadded
+EXTRA_CFLAGS += -Wpointer-arith
+EXTRA_CFLAGS += -Wredundant-decls
+EXTRA_CFLAGS += -Wshadow
+EXTRA_CFLAGS += -Wswitch-default
+EXTRA_CFLAGS += -Wvla
+endif
+
 # Read auto.conf if it exists, otherwise ignore
 -include include/config/auto.conf
 
@@ -403,7 +430,6 @@  ifneq ($(cmd_files),)
   include $(cmd_files)
 endif
 
-
 # Declare the contents of the .PHONY variable as phony.  We keep that
 # information in a variable se we can use it in if_changed and friends.