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linux/arch/mips/Makefile
Jean Delvare b1e0d8b70f kbuild: Fix gcc -x syntax 
The correct syntax for gcc -x is "gcc -x assembler", not
"gcc -xassembler". Even though the latter happens to work, the former
is what is documented in the manual page and thus what gcc wrappers
such as icecream do expect.

This isn't a cosmetic change. The missing space prevents icecream from
recognizing compilation tasks it can't handle, leading to silent kernel
miscompilations.

Besides me, credits go to Michael Matz and Dirk Mueller for
investigating the miscompilation issue and tracking it down to this
incorrect -x parameter syntax.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: stable@vger.kernel.org
Cc: Bernhard Walle <bernhard@bwalle.de>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>
2012-10-03 09:03:24 +02:00

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Makefile
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#
# This file is subject to the terms and conditions of the GNU General Public
# License. See the file "COPYING" in the main directory of this archive
# for more details.
#
# Copyright (C) 1994, 95, 96, 2003 by Ralf Baechle
# DECStation modifications by Paul M. Antoine, 1996
# Copyright (C) 2002, 2003, 2004 Maciej W. Rozycki
#
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies. Remember to do have actions
# for "archclean" cleaning up for this architecture.
#
KBUILD_DEFCONFIG := ip22_defconfig
#
# Select the object file format to substitute into the linker script.
#
ifdef CONFIG_CPU_LITTLE_ENDIAN
32bit-tool-archpref = mipsel
64bit-tool-archpref = mips64el
32bit-bfd = elf32-tradlittlemips
64bit-bfd = elf64-tradlittlemips
32bit-emul = elf32ltsmip
64bit-emul = elf64ltsmip
else
32bit-tool-archpref = mips
64bit-tool-archpref = mips64
32bit-bfd = elf32-tradbigmips
64bit-bfd = elf64-tradbigmips
32bit-emul = elf32btsmip
64bit-emul = elf64btsmip
endif
ifdef CONFIG_32BIT
tool-archpref = $(32bit-tool-archpref)
UTS_MACHINE := mips
endif
ifdef CONFIG_64BIT
tool-archpref = $(64bit-tool-archpref)
UTS_MACHINE := mips64
endif
ifneq ($(SUBARCH),$(ARCH))
ifeq ($(CROSS_COMPILE),)
CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux- $(tool-archpref)-linux-gnu- $(tool-archpref)-unknown-linux-gnu-)
endif
endif
ifdef CONFIG_FUNCTION_GRAPH_TRACER
ifndef KBUILD_MCOUNT_RA_ADDRESS
ifeq ($(call cc-option-yn,-mmcount-ra-address), y)
cflags-y += -mmcount-ra-address -DKBUILD_MCOUNT_RA_ADDRESS
endif
endif
endif
cflags-y += $(call cc-option, -mno-check-zero-division)
ifdef CONFIG_32BIT
ld-emul = $(32bit-emul)
vmlinux-32 = vmlinux
vmlinux-64 = vmlinux.64
cflags-y += -mabi=32
endif
ifdef CONFIG_64BIT
ld-emul = $(64bit-emul)
vmlinux-32 = vmlinux.32
vmlinux-64 = vmlinux
cflags-y += -mabi=64
endif
all-$(CONFIG_BOOT_ELF32) := $(vmlinux-32)
all-$(CONFIG_BOOT_ELF64) := $(vmlinux-64)
all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
#
# GCC uses -G 0 -mabicalls -fpic as default. We don't want PIC in the kernel
# code since it only slows down the whole thing. At some point we might make
# use of global pointer optimizations but their use of $28 conflicts with
# the current pointer optimization.
#
# The DECStation requires an ECOFF kernel for remote booting, other MIPS
# machines may also. Since BFD is incredibly buggy with respect to
# crossformat linking we rely on the elf2ecoff tool for format conversion.
#
cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
cflags-y += -msoft-float
LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
KBUILD_AFLAGS_MODULE += -mlong-calls
KBUILD_CFLAGS_MODULE += -mlong-calls
cflags-y += -ffreestanding
#
# We explicitly add the endianness specifier if needed, this allows
# to compile kernels with a toolchain for the other endianness. We
# carefully avoid to add it redundantly because gcc 3.3/3.4 complains
# when fed the toolchain default!
#
# Certain gcc versions up to gcc 4.1.1 (probably 4.2-subversion as of
# 2006-10-10 don't properly change the predefined symbols if -EB / -EL
# are used, so we kludge that here. A bug has been filed at
# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29413.
#
undef-all += -UMIPSEB -U_MIPSEB -U__MIPSEB -U__MIPSEB__
undef-all += -UMIPSEL -U_MIPSEL -U__MIPSEL -U__MIPSEL__
predef-be += -DMIPSEB -D_MIPSEB -D__MIPSEB -D__MIPSEB__
predef-le += -DMIPSEL -D_MIPSEL -D__MIPSEL -D__MIPSEL__
cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' && echo -EB $(undef-all) $(predef-be))
cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += $(shell $(CC) -dumpmachine |grep -q 'mips.*el-.*' || echo -EL $(undef-all) $(predef-le))
cflags-$(CONFIG_CPU_HAS_SMARTMIPS) += $(call cc-option,-msmartmips)
cflags-$(CONFIG_SB1XXX_CORELIS) += $(call cc-option,-mno-sched-prolog) \
-fno-omit-frame-pointer
#
# CPU-dependent compiler/assembler options for optimization.
#
cflags-$(CONFIG_CPU_R3000) += -march=r3000
cflags-$(CONFIG_CPU_TX39XX) += -march=r3900
cflags-$(CONFIG_CPU_R6000) += -march=r6000 -Wa,--trap
cflags-$(CONFIG_CPU_R4300) += -march=r4300 -Wa,--trap
cflags-$(CONFIG_CPU_VR41XX) += -march=r4100 -Wa,--trap
cflags-$(CONFIG_CPU_R4X00) += -march=r4600 -Wa,--trap
cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
-Wa,-mips32 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
-Wa,-mips32r2 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
-Wa,-mips64 -Wa,--trap
cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \
-Wa,-mips64r2 -Wa,--trap
cflags-$(CONFIG_CPU_R5000) += -march=r5000 -Wa,--trap
cflags-$(CONFIG_CPU_R5432) += $(call cc-option,-march=r5400,-march=r5000) \
-Wa,--trap
cflags-$(CONFIG_CPU_R5500) += $(call cc-option,-march=r5500,-march=r5000) \
-Wa,--trap
cflags-$(CONFIG_CPU_NEVADA) += $(call cc-option,-march=rm5200,-march=r5000) \
-Wa,--trap
cflags-$(CONFIG_CPU_RM7000) += $(call cc-option,-march=rm7000,-march=r5000) \
-Wa,--trap
cflags-$(CONFIG_CPU_RM9000) += $(call cc-option,-march=rm9000,-march=r5000) \
-Wa,--trap
cflags-$(CONFIG_CPU_SB1) += $(call cc-option,-march=sb1,-march=r5000) \
-Wa,--trap
cflags-$(CONFIG_CPU_R8000) += -march=r8000 -Wa,--trap
cflags-$(CONFIG_CPU_R10000) += $(call cc-option,-march=r10000,-march=r8000) \
-Wa,--trap
cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += $(call cc-option,-march=octeon) -Wa,--trap
ifeq (,$(findstring march=octeon, $(cflags-$(CONFIG_CPU_CAVIUM_OCTEON))))
cflags-$(CONFIG_CPU_CAVIUM_OCTEON) += -Wa,-march=octeon
endif
cflags-$(CONFIG_CAVIUM_CN63XXP1) += -Wa,-mfix-cn63xxp1
cflags-$(CONFIG_CPU_BMIPS) += -march=mips32 -Wa,-mips32 -Wa,--trap
cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,)
cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,)
cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)
ifdef CONFIG_CPU_SB1
ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
KBUILD_AFLAGS_MODULE += -msb1-pass1-workarounds
KBUILD_CFLAGS_MODULE += -msb1-pass1-workarounds
endif
endif
#
# Firmware support
#
libs-$(CONFIG_ARC) += arch/mips/fw/arc/
libs-$(CONFIG_CFE) += arch/mips/fw/cfe/
libs-$(CONFIG_SNIPROM) += arch/mips/fw/sni/
libs-y += arch/mips/fw/lib/
#
# Kernel compression
#
ifdef SYS_SUPPORTS_ZBOOT
COMPRESSION_FNAME = vmlinuz
else
COMPRESSION_FNAME = vmlinux
endif
#
# Board-dependent options and extra files
#
include $(srctree)/arch/mips/Kbuild.platforms
cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
drivers-$(CONFIG_PCI) += arch/mips/pci/
#
# Automatically detect the build format. By default we choose
# the elf format according to the load address.
# We can always force a build with a 64-bits symbol format by
# passing 'KBUILD_SYM32=no' option to the make's command line.
#
ifdef CONFIG_64BIT
ifndef KBUILD_SYM32
ifeq ($(shell expr $(load-y) \< 0xffffffff80000000), 0)
KBUILD_SYM32 = y
endif
endif
ifeq ($(KBUILD_SYM32)$(call cc-option-yn,-msym32), yy)
cflags-y += -msym32 -DKBUILD_64BIT_SYM32
else
ifeq ($(CONFIG_CPU_DADDI_WORKAROUNDS), y)
$(error CONFIG_CPU_DADDI_WORKAROUNDS unsupported without -msym32)
endif
endif
endif
KBUILD_AFLAGS += $(cflags-y)
KBUILD_CFLAGS += $(cflags-y)
KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
KBUILD_CPPFLAGS += -DDATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)
LDFLAGS += -m $(ld-emul)
ifdef CONFIG_MIPS
CHECKFLAGS += $(shell $(CC) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
egrep -vw '__GNUC_(|MINOR_|PATCHLEVEL_)_' | \
sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/")
ifdef CONFIG_64BIT
CHECKFLAGS += -m64
endif
endif
OBJCOPYFLAGS += --remove-section=.reginfo
head-y := arch/mips/kernel/head.o
libs-y += arch/mips/lib/
# See arch/mips/Kbuild for content of core part of the kernel
core-y += arch/mips/
drivers-$(CONFIG_OPROFILE) += arch/mips/oprofile/
# suspend and hibernation support
drivers-$(CONFIG_PM) += arch/mips/power/
ifdef CONFIG_LASAT
rom.bin rom.sw: vmlinux
$(Q)$(MAKE) $(build)=arch/mips/lasat/image $@
endif
#
# Some machines like the Indy need 32-bit ELF binaries for booting purposes.
# Other need ECOFF, so we build a 32-bit ELF binary for them which we then
# convert to ECOFF using elf2ecoff.
#
vmlinux.32: vmlinux
$(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
#obj-$(CONFIG_KPROBES) += kprobes.o
#
# The 64-bit ELF tools are pretty broken so at this time we generate 64-bit
# ELF files from 32-bit files by conversion.
#
vmlinux.64: vmlinux
$(OBJCOPY) -O $(64bit-bfd) $(OBJCOPYFLAGS) $< $@
all: $(all-y)
# boot
vmlinux.bin vmlinux.ecoff vmlinux.srec: $(vmlinux-32) FORCE
$(Q)$(MAKE) $(build)=arch/mips/boot VMLINUX=$(vmlinux-32) arch/mips/boot/$@
# boot/compressed
vmlinuz vmlinuz.bin vmlinuz.ecoff vmlinuz.srec: $(vmlinux-32) FORCE
$(Q)$(MAKE) $(build)=arch/mips/boot/compressed \
VMLINUX_LOAD_ADDRESS=$(load-y) 32bit-bfd=$(32bit-bfd) $@
CLEAN_FILES += vmlinux.32 vmlinux.64
archprepare:
ifdef CONFIG_MIPS32_N32
@echo ' Checking missing-syscalls for N32'
$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=n32"
endif
ifdef CONFIG_MIPS32_O32
@echo ' Checking missing-syscalls for O32'
$(Q)$(MAKE) $(build)=. missing-syscalls missing_syscalls_flags="-mabi=32"
endif
install:
$(Q)install -D -m 755 vmlinux $(INSTALL_PATH)/vmlinux-$(KERNELRELEASE)
ifdef CONFIG_SYS_SUPPORTS_ZBOOT
$(Q)install -D -m 755 vmlinuz $(INSTALL_PATH)/vmlinuz-$(KERNELRELEASE)
endif
$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
archclean:
$(Q)$(MAKE) $(clean)=arch/mips/boot
$(Q)$(MAKE) $(clean)=arch/mips/boot/compressed
$(Q)$(MAKE) $(clean)=arch/mips/lasat
define archhelp
echo ' install - install kernel into $(INSTALL_PATH)'
echo ' vmlinux.ecoff - ECOFF boot image'
echo ' vmlinux.bin - Raw binary boot image'
echo ' vmlinux.srec - SREC boot image'
echo ' vmlinuz - Compressed boot(zboot) image'
echo ' vmlinuz.ecoff - ECOFF zboot image'
echo ' vmlinuz.bin - Raw binary zboot image'
echo ' vmlinuz.srec - SREC zboot image'
echo
echo ' These will be default as appropriate for a configured platform.'
endef
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