Commit ba55bd74 authored by Michael Ellerman's avatar Michael Ellerman Committed by Benjamin Herrenschmidt
Browse files

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: default avatarMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent eedacbf0

arch/powerpc/Kconfig.debug

+17 −0
Original line number Diff line number Diff line
@@ -2,6 +2,23 @@ menu "Kernel hacking" 


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

arch/powerpc/kernel/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -4,6 +4,8 @@ 


CFLAGS_ptrace.o		+= -DUTS_MACHINE='"$(UTS_MACHINE)"'



subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror



ifeq ($(CONFIG_PPC64),y)

CFLAGS_prom_init.o	+= -mno-minimal-toc

endif

arch/powerpc/kvm/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -2,6 +2,8 @@ 
# Makefile for Kernel-based Virtual Machine module

#



subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror



EXTRA_CFLAGS += -Ivirt/kvm -Iarch/powerpc/kvm



common-objs-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o)

arch/powerpc/lib/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -2,6 +2,8 @@ 
# Makefile for ppc-specific library files..

#



subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror



ifeq ($(CONFIG_PPC64),y)

EXTRA_CFLAGS		+= -mno-minimal-toc

endif

arch/powerpc/mm/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -2,6 +2,8 @@ 
# Makefile for the linux ppc-specific parts of the memory manager.

#



subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror



ifeq ($(CONFIG_PPC64),y)

EXTRA_CFLAGS	+= -mno-minimal-toc

endif

CRA Git | Maintained and supported by SUSTech CRA and CCSE