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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>
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@ -2,6 +2,23 @@ menu "Kernel hacking"
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source "lib/Kconfig.debug"
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source "lib/Kconfig.debug"
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config PPC_DISABLE_WERROR
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bool "Don't build arch/powerpc code with -Werror"
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default n
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help
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This option tells the compiler NOT to build the code under
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arch/powerpc with the -Werror flag (which means warnings
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are treated as errors).
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Only enable this if you are hitting a build failure in the
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arch/powerpc code caused by a warning, and you don't feel
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inclined to fix it.
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config PPC_WERROR
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bool
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depends on !PPC_DISABLE_WERROR
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default y
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config PRINT_STACK_DEPTH
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config PRINT_STACK_DEPTH
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int "Stack depth to print" if DEBUG_KERNEL
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int "Stack depth to print" if DEBUG_KERNEL
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default 64
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default 64
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@ -4,6 +4,8 @@
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CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
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CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
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subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
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ifeq ($(CONFIG_PPC64),y)
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ifeq ($(CONFIG_PPC64),y)
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CFLAGS_prom_init.o += -mno-minimal-toc
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CFLAGS_prom_init.o += -mno-minimal-toc
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endif
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endif
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@ -2,6 +2,8 @@
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# Makefile for Kernel-based Virtual Machine module
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# Makefile for Kernel-based Virtual Machine module
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#
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#
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subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
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EXTRA_CFLAGS += -Ivirt/kvm -Iarch/powerpc/kvm
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EXTRA_CFLAGS += -Ivirt/kvm -Iarch/powerpc/kvm
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common-objs-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o)
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common-objs-y = $(addprefix ../../../virt/kvm/, kvm_main.o coalesced_mmio.o)
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@ -2,6 +2,8 @@
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# Makefile for ppc-specific library files..
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# Makefile for ppc-specific library files..
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#
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#
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subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
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ifeq ($(CONFIG_PPC64),y)
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ifeq ($(CONFIG_PPC64),y)
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EXTRA_CFLAGS += -mno-minimal-toc
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EXTRA_CFLAGS += -mno-minimal-toc
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endif
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endif
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@ -2,6 +2,8 @@
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# Makefile for the linux ppc-specific parts of the memory manager.
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# Makefile for the linux ppc-specific parts of the memory manager.
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#
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#
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subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
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ifeq ($(CONFIG_PPC64),y)
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ifeq ($(CONFIG_PPC64),y)
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EXTRA_CFLAGS += -mno-minimal-toc
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EXTRA_CFLAGS += -mno-minimal-toc
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endif
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endif
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@ -1,3 +1,5 @@
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subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
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ifeq ($(CONFIG_PPC64),y)
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ifeq ($(CONFIG_PPC64),y)
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EXTRA_CFLAGS += -mno-minimal-toc
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EXTRA_CFLAGS += -mno-minimal-toc
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endif
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endif
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@ -1,4 +1,6 @@
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subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
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obj-$(CONFIG_FSL_ULI1575) += fsl_uli1575.o
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obj-$(CONFIG_FSL_ULI1575) += fsl_uli1575.o
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obj-$(CONFIG_PPC_PMAC) += powermac/
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obj-$(CONFIG_PPC_PMAC) += powermac/
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@ -1,3 +1,5 @@
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subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
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ifeq ($(CONFIG_PPC64),y)
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ifeq ($(CONFIG_PPC64),y)
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EXTRA_CFLAGS += -mno-minimal-toc
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EXTRA_CFLAGS += -mno-minimal-toc
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endif
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endif
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@ -1,5 +1,7 @@
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# Makefile for xmon
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# Makefile for xmon
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subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
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ifdef CONFIG_PPC64
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ifdef CONFIG_PPC64
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EXTRA_CFLAGS += -mno-minimal-toc
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EXTRA_CFLAGS += -mno-minimal-toc
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endif
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endif
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