path: root/Makefile
diff options
authorBorislav Petkov <>2011-03-01 09:35:29 +0100
committerMichal Marek <>2011-03-09 15:35:35 +0100
commit4a5838ad9d2d4f7354a310982483f4c76aa0abeb (patch)
treefd037adafd8d7dd367292fe20ab290ccc79569a4 /Makefile
parentde933bd833be1a53bd361c9a327afd3c65413351 (diff)
kbuild: Add extra gcc checks
Add a 'W=1' Makefile switch which adds additional checking per build object. The idea behind this option is targeted at developers who, in the process of writing their code, want to do the occasional make W=1 [target.o] and let gcc do more extensive code checking for them. Then, they could eyeball the output for valid gcc warnings about various bugs/discrepancies which are not reported during the normal build process. For more background information and a use case, read through this thread: Cc: Michal Marek <> Cc: Acked-by: Sam Ravnborg <> Acked-by: Ingo Molnar <> Signed-off-by: Borislav Petkov <> Signed-off-by: Michal Marek <>
Diffstat (limited to 'Makefile')
1 files changed, 5 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index abb49bf8596e..2b1e37da2bb5 100644
--- a/Makefile
+++ b/Makefile
@@ -102,6 +102,10 @@ ifeq ("$(origin O)", "command line")
+ifeq ("$(origin W)", "command line")
# That's our default target when none is given on the command line
PHONY := _all
@@ -1262,6 +1266,7 @@ 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'