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

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
......@@ -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
......
......@@ -4,6 +4,8 @@
CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
ifeq ($(CONFIG_PPC64),y)
CFLAGS_prom_init.o += -mno-minimal-toc
endif
......
......@@ -2,6 +2,8 @@
# Makefile for Kernel-based Virtual Machine module
#
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
EXTRA_CFLAGS += -Ivirt/kvm -Iarch/powerpc/kvm
common-objs-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o)
......
......@@ -2,6 +2,8 @@
# Makefile for ppc-specific library files..
#
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
ifeq ($(CONFIG_PPC64),y)
EXTRA_CFLAGS += -mno-minimal-toc
endif
......
......@@ -2,6 +2,8 @@
# Makefile for the linux ppc-specific parts of the memory manager.
#
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
ifeq ($(CONFIG_PPC64),y)
EXTRA_CFLAGS += -mno-minimal-toc
endif
......
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
ifeq ($(CONFIG_PPC64),y)
EXTRA_CFLAGS += -mno-minimal-toc
endif
......
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
obj-$(CONFIG_FSL_ULI1575) += fsl_uli1575.o
obj-$(CONFIG_PPC_PMAC) += powermac/
......
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
ifeq ($(CONFIG_PPC64),y)
EXTRA_CFLAGS += -mno-minimal-toc
endif
......
# Makefile for xmon
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
ifdef CONFIG_PPC64
EXTRA_CFLAGS += -mno-minimal-toc
endif
......
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