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arm, cris, mips, sparc, powerpc, um, xtensa: fix build with bash 4.0
Albin Tonnerre <albin.tonnerre@free-electrons.com> reported:
Bash 4 filters out variables which contain a dot in them.
This happends to be the case of CPPFLAGS_vmlinux.lds.
This is rather unfortunate, as it now causes
build failures when using SHELL=/bin/bash to compile,
or when bash happens to be used by make (eg when it's /bin/sh)
Remove the common definition of CPPFLAGS_vmlinux.lds by
pushing relevant stuff to either Makefile.build or the
arch specific kernel/Makefile where we build the linker script.
This is also nice cleanup as we move the information out where
it is used.
Notes for the different architectures touched:
arm - we use an already exported symbol
cris - we use a config symbol aleady available
[Not build tested]
mips - the jiffies complexity has moved to vmlinux.lds.S where we need it.
Added a few variables to CPPFLAGS - they are only used by
the linker script.
[Not build tested]
powerpc - removed assignment that is not needed
[not build tested]
sparc - simplified it using $(BITS)
um - introduced a few new exported variables to deal with this
xtensa - added options to CPP invocation
[not build tested]
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Sam Ravnborg
parent
4356f48907
commit
51b563fc93
15 changed files with 37 additions and 49 deletions
5
Makefile
5
Makefile
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@ -1027,11 +1027,6 @@ prepare0: archprepare FORCE
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# All the preparing..
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prepare: prepare0
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# Leave this as default for preprocessing vmlinux.lds.S, which is now
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# done in arch/$(ARCH)/kernel/Makefile
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export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
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# The asm symlink changes when $(ARCH) changes.
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# Detect this and ask user to run make mrproper
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# If asm is a stale symlink (point to dir that does not exist) remove it
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@ -14,7 +14,7 @@ LDFLAGS_vmlinux :=-p --no-undefined -X
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ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
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LDFLAGS_vmlinux += --be8
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endif
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CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
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OBJCOPYFLAGS :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
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GZFLAGS :=-9
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#KBUILD_CFLAGS +=-pipe
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@ -2,7 +2,8 @@
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# Makefile for the linux kernel.
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#
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AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
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CPPFLAGS_vmlinux.lds := -DTEXT_OFFSET=$(TEXT_OFFSET)
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AFLAGS_head.o := -DTEXT_OFFSET=$(TEXT_OFFSET)
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ifdef CONFIG_DYNAMIC_FTRACE
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CFLAGS_REMOVE_ftrace.o = -pg
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@ -42,8 +42,6 @@ LD = $(CROSS_COMPILE)ld -mcrislinux
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OBJCOPYFLAGS := -O binary -R .note -R .comment -S
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CPPFLAGS_vmlinux.lds = -DDRAM_VIRTUAL_BASE=0x$(CONFIG_ETRAX_DRAM_VIRTUAL_BASE)
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KBUILD_AFLAGS += -mlinux -march=$(arch-y) $(inc)
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KBUILD_CFLAGS += -mlinux -march=$(arch-y) -pipe $(inc)
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KBUILD_CPPFLAGS += $(inc)
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@ -3,6 +3,7 @@
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# Makefile for the linux kernel.
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#
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CPPFLAGS_vmlinux.lds := -DDRAM_VIRTUAL_BASE=0x$(CONFIG_ETRAX_DRAM_VIRTUAL_BASE)
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extra-y := vmlinux.lds
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obj-y := process.o traps.o irq.o ptrace.o setup.o time.o sys_cris.o
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@ -627,16 +627,6 @@ endif
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cflags-y += -I$(srctree)/arch/mips/include/asm/mach-generic
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drivers-$(CONFIG_PCI) += arch/mips/pci/
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ifdef CONFIG_32BIT
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ifdef CONFIG_CPU_LITTLE_ENDIAN
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JIFFIES = jiffies_64
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else
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JIFFIES = jiffies_64 + 4
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endif
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else
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JIFFIES = jiffies_64
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endif
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#
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# Automatically detect the build format. By default we choose
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# the elf format according to the load address.
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@ -660,8 +650,9 @@ ifdef CONFIG_64BIT
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endif
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KBUILD_AFLAGS += $(cflags-y)
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KBUILD_CFLAGS += $(cflags-y) \
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-D"VMLINUX_LOAD_ADDRESS=$(load-y)"
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KBUILD_CFLAGS += $(cflags-y)
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KBUILD_CPPFLAGS += -D"VMLINUX_LOAD_ADDRESS=$(load-y)"
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KBUILD_CPPFLAGS += -D"DATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)"
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LDFLAGS += -m $(ld-emul)
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@ -676,18 +667,6 @@ endif
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OBJCOPYFLAGS += --remove-section=.reginfo
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#
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# Choosing incompatible machines durings configuration will result in
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# error messages during linking. Select a default linkscript if
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# none has been choosen above.
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#
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CPPFLAGS_vmlinux.lds := \
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$(KBUILD_CFLAGS) \
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-D"LOADADDR=$(load-y)" \
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-D"JIFFIES=$(JIFFIES)" \
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-D"DATAOFFSET=$(if $(dataoffset-y),$(dataoffset-y),0)"
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head-y := arch/mips/kernel/head.o arch/mips/kernel/init_task.o
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libs-y += arch/mips/lib/
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@ -10,7 +10,16 @@ PHDRS {
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text PT_LOAD FLAGS(7); /* RWX */
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note PT_NOTE FLAGS(4); /* R__ */
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}
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jiffies = JIFFIES;
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ifdef CONFIG_32BIT
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ifdef CONFIG_CPU_LITTLE_ENDIAN
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jiffies = jiffies_64;
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else
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jiffies = jiffies_64 + 4;
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endif
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else
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jiffies = jiffies_64;
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endif
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SECTIONS
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{
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@ -29,7 +38,7 @@ SECTIONS
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/* . = 0xa800000000300000; */
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. = 0xffffffff80300000;
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#endif
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. = LOADADDR;
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. = VMLINUX_LOAD_ADDRESS;
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/* read-only */
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_text = .; /* Text and read-only data */
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.text : {
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@ -158,8 +158,6 @@ drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
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# Default to zImage, override when needed
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all: zImage
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CPPFLAGS_vmlinux.lds := -Upowerpc
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BOOT_TARGETS = zImage zImage.initrd uImage zImage% dtbImage% treeImage.% cuImage.% simpleImage.%
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PHONY += $(BOOT_TARGETS)
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@ -31,7 +31,6 @@ export BITS := 32
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#KBUILD_CFLAGS += -g -pipe -fcall-used-g5 -fcall-used-g7
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KBUILD_CFLAGS += -m32 -pipe -mno-fpu -fcall-used-g5 -fcall-used-g7
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KBUILD_AFLAGS += -m32
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CPPFLAGS_vmlinux.lds += -m32
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#LDFLAGS_vmlinux = -N -Ttext 0xf0004000
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# Since 2.5.40, the first stage is left not btfix-ed.
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@ -45,9 +44,6 @@ else
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CHECKFLAGS += -D__sparc__ -D__sparc_v9__ -D__arch64__ -m64
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# Undefine sparc when processing vmlinux.lds - it is used
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# And teach CPP we are doing 64 bit builds (for this case)
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CPPFLAGS_vmlinux.lds += -m64 -Usparc
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LDFLAGS := -m elf64_sparc
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export BITS := 64
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@ -7,7 +7,11 @@ ccflags-y := -Werror
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extra-y := head_$(BITS).o
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extra-y += init_task.o
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extra-y += vmlinux.lds
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# Undefine sparc when processing vmlinux.lds - it is used
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# And teach CPP we are doing $(BITS) builds (for this case)
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CPPFLAGS_vmlinux.lds := -Usparc -m$(BITS)
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extra-y += vmlinux.lds
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obj-$(CONFIG_SPARC32) += entry.o wof.o wuf.o
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obj-$(CONFIG_SPARC32) += etrap_32.o
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@ -96,11 +96,10 @@ CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,)
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$(call cc-option, -fno-stack-protector,) \
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$(call cc-option, -fno-stack-protector-all,)
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CONFIG_KERNEL_STACK_ORDER ?= 2
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STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
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CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
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-DELF_FORMAT="$(ELF_FORMAT)" -DKERNEL_STACK_SIZE=$(STACK_SIZE)
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# Options used by linker script
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export LDS_START := $(START)
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export LDS_ELF_ARCH := $(ELF_ARCH)
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export LDS_ELF_FORMAT := $(ELF_FORMAT)
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# The wrappers will select whether using "malloc" or the kernel allocator.
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LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
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@ -3,6 +3,9 @@
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# Licensed under the GPL
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#
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CPPFLAGS_vmlinux.lds := -U$(SUBARCH) -DSTART=$(LDS_START) \
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-DELF_ARCH=$(LDS_ELF_ARCH) \
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-DELF_FORMAT=$(LDS_ELF_FORMAT)
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extra-y := vmlinux.lds
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clean-files :=
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@ -1,3 +1,6 @@
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KERNEL_STACK_SIZE = 4096 * (1 << CONFIG_KERNEL_STACK_ORDER);
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#ifdef CONFIG_LD_SCRIPT_STATIC
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#include "uml.lds.S"
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#else
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@ -27,7 +27,8 @@ sed-y = -e 's/(\(\.[a-z]*it\|\.ref\|\)\.text)/(\1.literal \1.text)/g' \
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-e 's/(\(\.text\.[a-z]*\))/(\1.literal \1)/g'
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quiet_cmd__cpp_lds_S = LDS $@
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cmd__cpp_lds_S = $(CPP) $(cpp_flags) -D__ASSEMBLY__ $< | sed $(sed-y) >$@
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cmd__cpp_lds_S = $(CPP) $(cpp_flags) -P -C -Uxtensa -D__ASSEMBLY__ $< \
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| sed $(sed-y) >$@
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$(obj)/vmlinux.lds: $(src)/vmlinux.lds.S FORCE
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$(call if_changed_dep,_cpp_lds_S)
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@ -270,7 +270,8 @@ targets += $(extra-y) $(MAKECMDGOALS) $(always)
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# Linker scripts preprocessor (.lds.S -> .lds)
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# ---------------------------------------------------------------------------
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quiet_cmd_cpp_lds_S = LDS $@
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cmd_cpp_lds_S = $(CPP) $(cpp_flags) -D__ASSEMBLY__ -o $@ $<
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cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
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-D__ASSEMBLY__ -o $@ $<
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$(obj)/%.lds: $(src)/%.lds.S FORCE
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$(call if_changed_dep,cpp_lds_S)
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