Basic implementation of 'make headers_install'
This adds a make target which exports a subset of headers which contain definitions which are useful for system libraries and tools. It uses the BSD 'unifdef' tool to remove instances of #ifdef __KERNEL__, and uses sed to remove markers like __user. Based on an original implementation by Arnd Bergmann <arnd@arndb.de> Hacked about by David Woodhouse <dwmw2@infradead.org> Reviewed and cleaned up by Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
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David Woodhouse
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13
Makefile
13
Makefile
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@ -855,6 +855,17 @@ PHONY += depend dep
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depend dep:
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@echo '*** Warning: make $@ is unnecessary now.'
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# ---------------------------------------------------------------------------
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# Kernel headers
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INSTALL_HDR_PATH=$(MODLIB)/abi
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export INSTALL_HDR_PATH
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PHONY += headers_install
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headers_install: include/linux/version.h
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$(Q)unifdef -Ux /dev/null
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$(Q)rm -rf $(INSTALL_HDR_PATH)/include
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$(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include
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# ---------------------------------------------------------------------------
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# Modules
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@ -1027,6 +1038,8 @@ help:
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@echo ' cscope - Generate cscope index'
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@echo ' kernelrelease - Output the release version string'
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@echo ' kernelversion - Output the version stored in Makefile'
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@echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'
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@echo ' (default: /lib/modules/$$VERSION/abi)'
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@echo ''
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@echo 'Static analysers'
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@echo ' checkstack - Generate a list of stack hogs'
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147
scripts/Makefile.headersinst
Normal file
147
scripts/Makefile.headersinst
Normal file
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@ -0,0 +1,147 @@
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# ==========================================================================
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# Installing headers
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#
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# header-y files will be installed verbatim
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# unifdef-y are the files where unifdef will be run before installing files
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# objhdr-y are generated files that will be installed verbatim
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#
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# ==========================================================================
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UNIFDEF := unifdef -U__KERNEL__
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# Eliminate the contents of (and inclusions of) compiler.h
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HDRSED := sed -e "s/ inline / __inline__ /g" \
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-e "s/[[:space:]]__user[[:space:]]\+/ /g" \
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-e "s/(__user[[:space:]]\+/ (/g" \
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-e "s/[[:space:]]__force[[:space:]]\+/ /g" \
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-e "s/(__force[[:space:]]\+/ (/g" \
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-e "s/[[:space:]]__iomem[[:space:]]\+/ /g" \
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-e "s/(__iomem[[:space:]]\+/ (/g" \
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-e "s/[[:space:]]__attribute_const__[[:space:]]\+/\ /g" \
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-e "s/[[:space:]]__attribute_const__$$//" \
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-e "/^\#include <linux\/compiler.h>/d"
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_dst := $(if $(dst),$(dst),$(obj))
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.PHONY: __headersinst
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__headersinst:
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ifeq (,$(patsubst include/asm/%,,$(obj)/))
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# For producing the generated stuff in include/asm for biarch builds, include
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# both sets of Kbuild files; we'll generate anything which is mentioned in
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# _either_ arch, and recurse into subdirectories which are mentioned in either
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# arch. Since some directories may exist in one but not the other, we must
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# use '-include'.
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GENASM := 1
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archasm := $(subst include/asm,asm-$(ARCH),$(obj))
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altarchasm := $(subst include/asm,asm-$(ALTARCH),$(obj))
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-include $(srctree)/include/$(archasm)/Kbuild
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-include $(srctree)/include/$(altarchasm)/Kbuild
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else
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include $(srctree)/$(obj)/Kbuild
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endif
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include scripts/Kbuild.include
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# If this is include/asm-$(ARCH) and there's no $(ALTARCH), then
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# override $(_dst) so that we install to include/asm directly.
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ifeq ($(obj)$(ALTARCH),include/asm-$(ARCH))
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_dst := include/asm
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endif
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header-y := $(sort $(header-y))
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unifdef-y := $(sort $(unifdef-y))
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subdir-y := $(patsubst %/,%,$(filter %/, $(header-y)))
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header-y := $(filter-out %/, $(header-y))
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header-y := $(filter-out $(unifdef-y),$(header-y))
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ifdef ALTARCH
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ifeq ($(obj),include/asm-$(ARCH))
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altarch-y := altarch-dir
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endif
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endif
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# Make the definitions visible for recursive make invocations
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export ALTARCH
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export ARCHDEF
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export ALTARCHDEF
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quiet_cmd_o_hdr_install = INSTALL $(_dst)/$@
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cmd_o_hdr_install = cp $(objtree)/$(obj)/$@ $(INSTALL_HDR_PATH)/$(_dst)
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quiet_cmd_headers_install = INSTALL $(_dst)/$@
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cmd_headers_install = $(HDRSED) $(srctree)/$(obj)/$@ \
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> $(INSTALL_HDR_PATH)/$(_dst)/$@
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quiet_cmd_unifdef = UNIFDEF $(_dst)/$@
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cmd_unifdef = $(UNIFDEF) $(srctree)/$(obj)/$@ | $(HDRSED) \
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> $(INSTALL_HDR_PATH)/$(_dst)/$@ || :
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quiet_cmd_mkdir = MKDIR $@
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cmd_mkdir = mkdir -p $(INSTALL_HDR_PATH)/$@
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quiet_cmd_gen = GEN $(_dst)/$@
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cmd_gen = \
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STUBDEF=__ASM_STUB_`echo $@ | tr a-z. A-Z_`; \
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(echo "/* File autogenerated by 'make headers_install' */" ; \
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echo "\#ifndef $$STUBDEF" ; \
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echo "\#define $$STUBDEF" ; \
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echo "\# if $(ARCHDEF)" ; \
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if [ -r $(srctree)/include/$(archasm)/$@ ]; then \
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echo "\# include <$(archasm)/$@>" ; \
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else \
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echo "\# error $(archasm)/$@ does not exist in" \
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"the $(ARCH) architecture" ; \
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fi ; \
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echo "\# elif $(ALTARCHDEF)" ; \
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if [ -r $(srctree)/include/$(altarchasm)/$@ ]; then \
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echo "\# include <$(altarchasm)/$@>" ; \
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else \
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echo "\# error $(altarchasm)/$@ does not exist in" \
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"the $(ALTARCH) architecture" ; \
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fi ; \
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echo "\# else" ; \
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echo "\# warning This machine appears to be" \
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"neither $(ARCH) nor $(ALTARCH)." ; \
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echo "\# endif" ; \
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echo "\#endif /* $$STUBDEF */" ; \
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) > $(INSTALL_HDR_PATH)/$(_dst)/$@
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__headersinst: $(subdir-y) $(header-y) $(unifdef-y) $(altarch-y) $(objhdr-y)
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.PHONY: $(header-y) $(unifdef-y) $(subdir-y)
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# Rules for installing headers
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$(objhdr-y) $(subdir-y) $(header-y) $(unifdef-y): $(_dst)
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.PHONY: $(_dst)
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$(_dst):
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$(call cmd,mkdir)
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ifdef GENASM
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$(objhdr-y) $(header-y) $(unifdef-y):
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$(call cmd,gen)
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else
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$(objhdr-y):
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$(call cmd,o_hdr_install)
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$(header-y):
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$(call cmd,headers_install)
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$(unifdef-y):
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$(call cmd,unifdef)
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endif
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hdrinst := -rR -f $(srctree)/scripts/Makefile.headersinst obj
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.PHONY: altarch-dir
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altarch-dir:
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$(Q)$(MAKE) $(hdrinst)=include/asm-$(ALTARCH) dst=include/asm-$(ALTARCH)
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$(Q)$(MAKE) $(hdrinst)=include/asm dst=include/asm
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# Recursion
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$(subdir-y):
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$(Q)$(MAKE) $(hdrinst)=$(obj)/$@ dst=$(_dst)/$@ rel=../$(rel)
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