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Commit ef129412 authored by Andrew Morton's avatar Andrew Morton Committed by Linus Torvalds
Browse files

[PATCH] build compile.h earlier 



compile.h is created super-late in the build.  But proc_misc.c want to include
it, and it's generally not sane to have a header file in include/linux be
created at the end of the build: it's either not present or, worse, wrong for
most of the build.

So the patch arranges for compile.h to be built at the start of the build
process.  It also consolidates the compile.h rules with those for version.h
and utsname.h, so they all get built together.

I hope.  My chances of having got this right are about 2%.

Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 0888f06a

Makefile

+22 −9
Original line number Diff line number Diff line
@@ -368,10 +368,14 @@ endif 
# Detect when mixed targets is specified, and make a second invocation

# of make so .config is not included in this case either (for *config).



no-dot-config-targets := clean mrproper distclean \

PHONY += generated_headers



generated_headers: include/linux/version.h include/linux/compile.h \

		include/linux/utsrelease.h



no-dot-config-targets := generated_headers clean mrproper distclean \

			 cscope TAGS tags help %docs check% \

			 include/linux/version.h headers_% \

			 kernelrelease kernelversion

			 headers_% kernelrelease kernelversion



config-targets := 0

mixed-targets  := 0
@@ -734,6 +738,16 @@ debug_kallsyms: .tmp_map$(last_kallsyms) 


endif # ifdef CONFIG_KALLSYMS



# compile.h changes depending on hostname, generation number, etc,

# so we regenerate it always.

# mkcompile_h will make sure to only update the

# actual file if its content has changed.



include/linux/compile.h: FORCE

	@echo '  CHK     $@'

	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \

	"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(CFLAGS)"



# vmlinux image - including updated kernel symbols

vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE

ifdef CONFIG_HEADERS_CHECK
@@ -852,8 +866,8 @@ endif 
# prepare2 creates a makefile if using a separate output directory

prepare2: prepare3 outputmakefile



prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \

                   include/asm include/config/auto.conf

prepare1: prepare2 generated_headers include/asm include/config/auto.conf



ifneq ($(KBUILD_MODULES),)

	$(Q)mkdir -p $(MODVERDIR)

	$(Q)rm -f $(MODVERDIR)/*
@@ -922,14 +936,14 @@ export INSTALL_HDR_PATH 
HDRARCHES=$(filter-out generic,$(patsubst $(srctree)/include/asm-%/Kbuild,%,$(wildcard $(srctree)/include/asm-*/Kbuild)))



PHONY += headers_install_all

headers_install_all: include/linux/version.h scripts_basic FORCE

headers_install_all: generated_headers scripts_basic FORCE

	$(Q)$(MAKE) $(build)=scripts scripts/unifdef

	$(Q)for arch in $(HDRARCHES); do \

	 $(MAKE) ARCH=$$arch -f $(srctree)/scripts/Makefile.headersinst obj=include BIASMDIR=-bi-$$arch ;\

	 done



PHONY += headers_install

headers_install: include/linux/version.h scripts_basic FORCE

headers_install: generated_headers scripts_basic FORCE

	@if [ ! -r $(srctree)/include/asm-$(ARCH)/Kbuild ]; then \

	  echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \

	  exit 1 ; fi
@@ -1026,8 +1040,7 @@ CLEAN_FILES += vmlinux System.map \ 
# Directories & files removed with 'make mrproper'

MRPROPER_DIRS  += include/config include2 usr/include

MRPROPER_FILES += .config .config.old include/asm .version .old_version \

                  include/linux/autoconf.h include/linux/version.h      \

                  include/linux/utsrelease.h                            \

                  include/linux/autoconf.h generated-headers		\

		  Module.symvers tags TAGS cscope*



# clean - Delete most, but leave enough to build external modules

init/Makefile

+0 −9
Original line number Diff line number Diff line
@@ -18,12 +18,3 @@ clean-files := ../include/linux/compile.h 
$(obj)/main.o: include/linux/compile.h

$(obj)/version.o: include/linux/compile.h

# compile.h changes depending on hostname, generation number, etc,

# so we regenerate it always.

# mkcompile_h will make sure to only update the

# actual file if its content has changed.



include/linux/compile.h: FORCE

	@echo '  CHK     $@'

	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkcompile_h $@ \

	"$(UTS_MACHINE)" "$(CONFIG_SMP)" "$(CONFIG_PREEMPT)" "$(CC) $(CFLAGS)"