faf499dfcc
Currently we only set the -march compiler option if the kbuild system figured out that the compiler actually supports the selected architecture (cc-option test). In result this means that no -march compiler option is set when an unsupported cpu architecture of the current compiler is selected. The kernel compile will afterwards succeed but with the default architecture instead of the (unsupported) selected one. Change this behaviour, so compiles will fail if the compiler does not support the selected cpu architecture. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
122 lines
3.3 KiB
Makefile
122 lines
3.3 KiB
Makefile
#
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# s390/Makefile
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#
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# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies. Remember to do have actions
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# for "archclean" and "archdep" for cleaning up and making dependencies for
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# this architecture
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 1994 by Linus Torvalds
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#
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ifndef CONFIG_64BIT
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LD_BFD := elf32-s390
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LDFLAGS := -m elf_s390
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KBUILD_CFLAGS += -m31
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KBUILD_AFLAGS += -m31
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UTS_MACHINE := s390
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STACK_SIZE := 8192
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CHECKFLAGS += -D__s390__ -msize-long
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else
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LD_BFD := elf64-s390
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LDFLAGS := -m elf64_s390
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KBUILD_AFLAGS_MODULE += -fPIC
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KBUILD_CFLAGS_MODULE += -fPIC
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KBUILD_CFLAGS += -m64
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KBUILD_AFLAGS += -m64
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UTS_MACHINE := s390x
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STACK_SIZE := 16384
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CHECKFLAGS += -D__s390__ -D__s390x__
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endif
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export LD_BFD
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cflags-$(CONFIG_MARCH_G5) += -march=g5
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cflags-$(CONFIG_MARCH_Z900) += -march=z900
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cflags-$(CONFIG_MARCH_Z990) += -march=z990
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cflags-$(CONFIG_MARCH_Z9_109) += -march=z9-109
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cflags-$(CONFIG_MARCH_Z10) += -march=z10
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cflags-$(CONFIG_MARCH_Z196) += -march=z196
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cflags-$(CONFIG_MARCH_ZEC12) += -march=zEC12
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#KBUILD_IMAGE is necessary for make rpm
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KBUILD_IMAGE :=arch/s390/boot/image
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#
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# Prevent tail-call optimizations, to get clearer backtraces:
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#
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cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
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# old style option for packed stacks
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ifeq ($(call cc-option-yn,-mkernel-backchain),y)
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cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
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aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
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endif
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# new style option for packed stacks
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ifeq ($(call cc-option-yn,-mpacked-stack),y)
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cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
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aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
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endif
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ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
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cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
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ifneq ($(call cc-option-yn,-mstack-size=8192),y)
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cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
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endif
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endif
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ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
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cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
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endif
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KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
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KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
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KBUILD_AFLAGS += $(aflags-y)
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OBJCOPYFLAGS := -O binary
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head-y := arch/s390/kernel/head.o
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head-y += arch/s390/kernel/$(if $(CONFIG_64BIT),head64.o,head31.o)
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# See arch/s390/Kbuild for content of core part of the kernel
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core-y += arch/s390/
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libs-y += arch/s390/lib/
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drivers-y += drivers/s390/
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# must be linked after kernel
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drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
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boot := arch/s390/boot
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all: image bzImage
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install: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $@
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image bzImage: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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zfcpdump:
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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vdso_install:
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ifeq ($(CONFIG_64BIT),y)
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$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
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endif
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$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
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archclean:
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$(Q)$(MAKE) $(clean)=$(boot)
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# Don't use tabs in echo arguments
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define archhelp
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echo '* image - Kernel image for IPL ($(boot)/image)'
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echo '* bzImage - Compressed kernel image for IPL ($(boot)/bzImage)'
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endef
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