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Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Pull kbuild updates from Michal Marek:
"Here is the first round of kbuild changes for v4.1-rc1:
- kallsyms fix for ARM and cleanup
- make dep(end) removed (developers have no sense of nostalgia these
days...)
- include Makefiles by relative path
- stop useless rebuilds of asm-offsets.h and bounds.h"
* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
Kbuild: kallsyms: drop special handling of pre-3.0 GCC symbols
Kbuild: kallsyms: ignore veneers emitted by the ARM linker
kbuild: ia64: use $(src)/Makefile.gate rather than particular path
kbuild: include $(src)/Makefile rather than $(obj)/Makefile
kbuild: use relative path more to include Makefile
kbuild: use relative path to include Makefile
kbuild: do not add $(bounds-file) and $(offsets-file) to targets
kbuild: remove warning about "make depend"
kbuild: Don't reset timestamps in include/generated if not needed
This commit is contained in:
Linus Torvalds
commit
b422b75875
21
Kbuild
21
Kbuild
@ -13,8 +13,9 @@ define sed-y
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s:->::; p;}"
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endef
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quiet_cmd_offsets = GEN $@
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define cmd_offsets
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# Use filechk to avoid rebuilds when a header changes, but the resulting file
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# does not
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define filechk_offsets
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(set -e; \
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echo "#ifndef $2"; \
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echo "#define $2"; \
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@ -24,9 +25,9 @@ define cmd_offsets
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echo " * This file was generated by Kbuild"; \
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echo " */"; \
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echo ""; \
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sed -ne $(sed-y) $<; \
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sed -ne $(sed-y); \
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echo ""; \
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echo "#endif" ) > $@
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echo "#endif" )
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endef
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#####
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@ -35,16 +36,15 @@ endef
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bounds-file := include/generated/bounds.h
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always := $(bounds-file)
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targets := $(bounds-file) kernel/bounds.s
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targets := kernel/bounds.s
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# We use internal kbuild rules to avoid the "is up to date" message from make
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kernel/bounds.s: kernel/bounds.c FORCE
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$(Q)mkdir -p $(dir $@)
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$(call if_changed_dep,cc_s_c)
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$(obj)/$(bounds-file): kernel/bounds.s Kbuild
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$(Q)mkdir -p $(dir $@)
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$(call cmd,offsets,__LINUX_BOUNDS_H__)
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$(obj)/$(bounds-file): kernel/bounds.s FORCE
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$(call filechk,offsets,__LINUX_BOUNDS_H__)
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#####
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# 2) Generate asm-offsets.h
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@ -53,7 +53,6 @@ $(obj)/$(bounds-file): kernel/bounds.s Kbuild
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offsets-file := include/generated/asm-offsets.h
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always += $(offsets-file)
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targets += $(offsets-file)
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targets += arch/$(SRCARCH)/kernel/asm-offsets.s
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# We use internal kbuild rules to avoid the "is up to date" message from make
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@ -62,8 +61,8 @@ arch/$(SRCARCH)/kernel/asm-offsets.s: arch/$(SRCARCH)/kernel/asm-offsets.c \
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$(Q)mkdir -p $(dir $@)
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$(call if_changed_dep,cc_s_c)
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$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s Kbuild
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$(call cmd,offsets,__ASM_OFFSETS_H__)
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$(obj)/$(offsets-file): arch/$(SRCARCH)/kernel/asm-offsets.s FORCE
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$(call filechk,offsets,__ASM_OFFSETS_H__)
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#####
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# 3) Check for missing system calls
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26
Makefile
26
Makefile
@ -10,9 +10,10 @@ NAME = Hurr durr I'ma sheep
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# Comments in this file are targeted only to the developer, do not
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# expect to learn how to build the kernel reading this file.
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# Do not use make's built-in rules and variables
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# o Do not use make's built-in rules and variables
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# (this increases performance and avoids hard-to-debug behaviour);
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MAKEFLAGS += -rR
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# o Look for make include files relative to root of kernel src
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MAKEFLAGS += -rR --include-dir=$(CURDIR)
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# Avoid funny character set dependencies
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unexport LC_ALL
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@ -344,12 +345,9 @@ endif
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export COMPILER
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endif
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# Look for make include files relative to root of kernel src
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MAKEFLAGS += --include-dir=$(srctree)
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# We need some generic definitions (do not try to remake the file).
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$(srctree)/scripts/Kbuild.include: ;
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include $(srctree)/scripts/Kbuild.include
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scripts/Kbuild.include: ;
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include scripts/Kbuild.include
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# Make variables (CC, etc...)
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AS = $(CROSS_COMPILE)as
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@ -533,7 +531,7 @@ ifeq ($(config-targets),1)
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# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
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# KBUILD_DEFCONFIG may point out an alternative default configuration
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# used for 'make defconfig'
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include $(srctree)/arch/$(SRCARCH)/Makefile
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include arch/$(SRCARCH)/Makefile
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export KBUILD_DEFCONFIG KBUILD_KCONFIG
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config: scripts_basic outputmakefile FORCE
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@ -609,7 +607,7 @@ endif # $(dot-config)
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# Defaults to vmlinux, but the arch makefile usually adds further targets
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all: vmlinux
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include $(srctree)/arch/$(SRCARCH)/Makefile
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include arch/$(SRCARCH)/Makefile
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KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
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@ -782,8 +780,8 @@ ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC)), y)
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KBUILD_AFLAGS += -DCC_HAVE_ASM_GOTO
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endif
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include $(srctree)/scripts/Makefile.kasan
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include $(srctree)/scripts/Makefile.extrawarn
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include scripts/Makefile.kasan
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include scripts/Makefile.extrawarn
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# Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
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KBUILD_CPPFLAGS += $(KCPPFLAGS)
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@ -1026,12 +1024,6 @@ headerdep:
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$(Q)find $(srctree)/include/ -name '*.h' | xargs --max-args 1 \
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$(srctree)/scripts/headerdep.pl -I$(srctree)/include
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# ---------------------------------------------------------------------------
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PHONY += depend dep
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depend dep:
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@echo '*** Warning: make $@ is unnecessary now.'
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# ---------------------------------------------------------------------------
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# Firmware install
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INSTALL_FW_PATH=$(INSTALL_MOD_PATH)/lib/firmware
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@ -12,7 +12,7 @@
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#
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ifneq ($(MACHINE),)
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include $(srctree)/$(MACHINE)/Makefile.boot
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include $(MACHINE)/Makefile.boot
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endif
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# Note: the following conditions must always be true:
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@ -51,7 +51,7 @@ obj-$(CONFIG_BINFMT_ELF) += elfcore.o
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CFLAGS_traps.o += -mfixed-range=f2-f5,f16-f31
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# The gate DSO image is built using a special linker script.
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include $(srctree)/arch/ia64/kernel/Makefile.gate
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include $(src)/Makefile.gate
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# tell compiled for native
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CPPFLAGS_gate.lds += -D__IA64_GATE_PARAVIRTUALIZED_NATIVE
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@ -225,7 +225,7 @@ endif
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#
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# Board-dependent options and extra files
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#
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include $(srctree)/arch/mips/Kbuild.platforms
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include arch/mips/Kbuild.platforms
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ifdef CONFIG_PHYSICAL_START
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load-y = $(CONFIG_PHYSICAL_START)
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@ -43,8 +43,8 @@ endif
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HOST_DIR := arch/$(HEADER_ARCH)
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include $(srctree)/$(ARCH_DIR)/Makefile-skas
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include $(srctree)/$(HOST_DIR)/Makefile.um
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include $(ARCH_DIR)/Makefile-skas
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include $(HOST_DIR)/Makefile.um
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core-y += $(HOST_DIR)/um/
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@ -73,7 +73,7 @@ USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
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$(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include
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#This will adjust *FLAGS accordingly to the platform.
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include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
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include $(ARCH_DIR)/Makefile-os-$(OS)
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KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
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-I$(srctree)/$(HOST_DIR)/include/uapi \
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@ -63,7 +63,7 @@ ifeq ($(CONFIG_X86_32),y)
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$(call cc-option,-fno-unit-at-a-time))
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# CPU-specific tuning. Anything which can be shared with UML should go here.
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include $(srctree)/arch/x86/Makefile_32.cpu
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include arch/x86/Makefile_32.cpu
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KBUILD_CFLAGS += $(cflags-y)
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# temporary until string.h is fixed
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@ -18,7 +18,7 @@ LDS_EXTRA := -Ui386
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export LDS_EXTRA
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# First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y.
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include $(srctree)/arch/x86/Makefile_32.cpu
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include arch/x86/Makefile_32.cpu
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# prevent gcc from keeping the stack 16 byte aligned. Taken from i386.
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cflags-y += $(call cc-option,-mpreferred-stack-boundary=2)
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@ -18,7 +18,7 @@ export dtbinst-root ?= $(obj)
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include include/config/auto.conf
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include scripts/Kbuild.include
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include $(srctree)/$(obj)/Makefile
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include $(src)/Makefile
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PHONY += __dtbs_install_prep
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__dtbs_install_prep:
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@ -13,7 +13,7 @@ src := $(obj)
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-include $(objtree)/.config
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include scripts/Kbuild.include
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include $(srctree)/$(obj)/Makefile
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include $(src)/Makefile
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include scripts/Makefile.host
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@ -212,15 +212,22 @@ static int symbol_valid(struct sym_entry *s)
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"_SDA_BASE_", /* ppc */
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"_SDA2_BASE_", /* ppc */
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NULL };
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static char *special_suffixes[] = {
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"_veneer", /* arm */
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NULL };
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int i;
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int offset = 1;
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char *sym_name = (char *)s->sym + 1;
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if (s->addr < kernel_start_addr)
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return 0;
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/* skip prefix char */
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if (symbol_prefix_char && *(s->sym + 1) == symbol_prefix_char)
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offset++;
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if (symbol_prefix_char && *sym_name == symbol_prefix_char)
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sym_name++;
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/* if --all-symbols is not specified, then symbols outside the text
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* and inittext sections are discarded */
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@ -235,21 +242,25 @@ static int symbol_valid(struct sym_entry *s)
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* rules.
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*/
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if ((s->addr == text_range_text->end &&
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strcmp((char *)s->sym + offset,
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strcmp(sym_name,
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text_range_text->end_sym)) ||
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(s->addr == text_range_inittext->end &&
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strcmp((char *)s->sym + offset,
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strcmp(sym_name,
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text_range_inittext->end_sym)))
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return 0;
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}
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/* Exclude symbols which vary between passes. */
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if (strstr((char *)s->sym + offset, "_compiled."))
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for (i = 0; special_symbols[i]; i++)
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if (strcmp(sym_name, special_symbols[i]) == 0)
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return 0;
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for (i = 0; special_symbols[i]; i++)
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if( strcmp((char *)s->sym + offset, special_symbols[i]) == 0 )
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for (i = 0; special_suffixes[i]; i++) {
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int l = strlen(sym_name) - strlen(special_suffixes[i]);
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if (l >= 0 && strcmp(sym_name + l, special_suffixes[i]) == 0)
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return 0;
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}
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return 1;
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}
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