powerpc: Add configurable -Werror for arch/powerpc
Add the option to build the code under arch/powerpc with -Werror.
The intention is to make it harder for people to inadvertantly introduce
warnings in the arch/powerpc code. It needs to be configurable so that
if a warning is introduced, people can easily work around it while it's
being fixed.
The option is a negative, ie. don't enable -Werror, so that it will be
turned on for allyes and allmodconfig builds.
The default is n, in the hope that developers will build with -Werror,
that will probably lead to some build breaks, I am prepared to be flamed.
It's not enabled for math-emu, which is a steaming pile of warnings.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index d79a902..3b10051 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -2,6 +2,23 @@
source "lib/Kconfig.debug"
+config PPC_DISABLE_WERROR
+ bool "Don't build arch/powerpc code with -Werror"
+ default n
+ help
+ This option tells the compiler NOT to build the code under
+ arch/powerpc with the -Werror flag (which means warnings
+ are treated as errors).
+
+ Only enable this if you are hitting a build failure in the
+ arch/powerpc code caused by a warning, and you don't feel
+ inclined to fix it.
+
+config PPC_WERROR
+ bool
+ depends on !PPC_DISABLE_WERROR
+ default y
+
config PRINT_STACK_DEPTH
int "Stack depth to print" if DEBUG_KERNEL
default 64