From 86feeaa8120bb1b0ab21efed49e9754039395ef1 Mon Sep 17 00:00:00 2001 From: Sam Ravnborg Date: Fri, 9 Sep 2005 19:28:28 +0200 Subject: [PATCH] kbuild: full dependency check on asm-offsets.h Building asm-offsets.h has been moved to a seperate Kbuild file located in the top-level directory. This allow us to share the functionality across the architectures. The old rules in architecture specific Makefiles will die in subsequent patches. Furhtermore the usual kbuild dependency tracking is now used when deciding to rebuild asm-offsets.s. So we no longer risk to fail a rebuild caused by asm-offsets.c dependencies being touched. With this common rule-set we now force the same name across all architectures. Following patches will fix the rest. Signed-off-by: Sam Ravnborg --- Kbuild | 41 +++++++++++++++++++++++++++ Makefile | 39 +++++++------------------ arch/i386/Makefile | 9 ------ arch/i386/kernel/head.S | 2 +- arch/i386/kernel/vsyscall-sigreturn.S | 2 +- arch/i386/kernel/vsyscall.lds.S | 2 +- arch/i386/power/swsusp.S | 2 +- include/asm-i386/thread_info.h | 2 +- 8 files changed, 57 insertions(+), 42 deletions(-) create mode 100644 Kbuild diff --git a/Kbuild b/Kbuild new file mode 100644 index 00000000000000..197ece85034ba8 --- /dev/null +++ b/Kbuild @@ -0,0 +1,41 @@ +# +# Kbuild for top-level directory of the kernel +# This file takes care of the following: +# 1) Generate asm-offsets.h + +##### +# 1) Generate asm-offsets.h +# + +offsets-file := include/asm-$(ARCH)/asm-offsets.h + +always := $(offsets-file) +targets := $(offsets-file) +targets += arch/$(ARCH)/kernel/asm-offsets.s + +quiet_cmd_offsets = GEN $@ +define cmd_offsets + cat $< | \ + (set -e; \ + echo "#ifndef __ASM_OFFSETS_H__"; \ + echo "#define __ASM_OFFSETS_H__"; \ + echo "/*"; \ + echo " * DO NOT MODIFY."; \ + echo " *"; \ + echo " * This file was generated by $(srctree)/Kbuild"; \ + echo " *"; \ + echo " */"; \ + echo ""; \ + sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ + echo ""; \ + echo "#endif" ) > $@ +endef + +# We use internal kbuild rules to avoid the "is up to date" message from make +arch/$(ARCH)/kernel/asm-offsets.s: arch/$(ARCH)/kernel/asm-offsets.c FORCE + $(Q)mkdir -p $(dir $@) + $(call if_changed_dep,cc_s_c) + +$(srctree)/$(offsets-file): arch/$(ARCH)/kernel/asm-offsets.s Kbuild + $(call cmd,offsets) + diff --git a/Makefile b/Makefile index 63e5c9f0bc7ad9..2402430c87e663 100644 --- a/Makefile +++ b/Makefile @@ -776,14 +776,14 @@ $(vmlinux-dirs): prepare-all scripts # A multi level approach is used. prepare1 is updated first, then prepare0. # prepare-all is the collection point for the prepare targets. -.PHONY: prepare-all prepare prepare0 prepare1 prepare2 +.PHONY: prepare-all prepare prepare0 prepare1 prepare2 prepare3 -# prepare2 is used to check if we are building in a separate output directory, +# prepare3 is used to check if we are building in a separate output directory, # and if so do: # 1) Check that make has not been executed in the kernel src $(srctree) # 2) Create the include2 directory, used for the second asm symlink -prepare2: +prepare3: ifneq ($(KBUILD_SRC),) @echo ' Using $(srctree) as source for kernel' $(Q)if [ -f $(srctree)/.config ]; then \ @@ -795,18 +795,21 @@ ifneq ($(KBUILD_SRC),) $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm endif -# prepare1 creates a makefile if using a separate output directory -prepare1: prepare2 outputmakefile +# prepare2 creates a makefile if using a separate output directory +prepare2: prepare3 outputmakefile -prepare0: prepare1 include/linux/version.h include/asm \ +prepare1: prepare2 include/linux/version.h include/asm \ include/config/MARKER ifneq ($(KBUILD_MODULES),) $(Q)rm -rf $(MODVERDIR) $(Q)mkdir -p $(MODVERDIR) endif +prepare0: prepare prepare1 FORCE + $(Q)$(MAKE) $(build)=$(srctree) + # All the preparing.. -prepare-all: prepare0 prepare +prepare-all: prepare0 # Leave this as default for preprocessing vmlinux.lds.S, which is now # done in arch/$(ARCH)/kernel/Makefile @@ -949,26 +952,6 @@ modules modules_install: FORCE endif # CONFIG_MODULES -# Generate asm-offsets.h -# --------------------------------------------------------------------------- - -define filechk_gen-asm-offsets - (set -e; \ - echo "#ifndef __ASM_OFFSETS_H__"; \ - echo "#define __ASM_OFFSETS_H__"; \ - echo "/*"; \ - echo " * DO NOT MODIFY."; \ - echo " *"; \ - echo " * This file was generated by arch/$(ARCH)/Makefile"; \ - echo " *"; \ - echo " */"; \ - echo ""; \ - sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ - echo ""; \ - echo "#endif" ) -endef - - ### # Cleaning is done on three levels. # make clean Delete most generated files @@ -991,7 +974,7 @@ MRPROPER_FILES += .config .config.old include/asm .version \ # clean: rm-dirs := $(CLEAN_DIRS) clean: rm-files := $(CLEAN_FILES) -clean-dirs := $(addprefix _clean_,$(vmlinux-alldirs)) +clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) .PHONY: $(clean-dirs) clean archclean $(clean-dirs): diff --git a/arch/i386/Makefile b/arch/i386/Makefile index bf7c9ba709f32d..09951990a6226b 100644 --- a/arch/i386/Makefile +++ b/arch/i386/Makefile @@ -156,15 +156,6 @@ install: vmlinux install kernel_install: $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install -prepare: include/asm-$(ARCH)/asm_offsets.h -CLEAN_FILES += include/asm-$(ARCH)/asm_offsets.h - -arch/$(ARCH)/kernel/asm-offsets.s: include/asm include/linux/version.h \ - include/config/MARKER - -include/asm-$(ARCH)/asm_offsets.h: arch/$(ARCH)/kernel/asm-offsets.s - $(call filechk,gen-asm-offsets) - archclean: $(Q)$(MAKE) $(clean)=arch/i386/boot diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S index 0480ca9e9e577a..e437fb367498c0 100644 --- a/arch/i386/kernel/head.S +++ b/arch/i386/kernel/head.S @@ -17,7 +17,7 @@ #include #include #include -#include +#include #include /* diff --git a/arch/i386/kernel/vsyscall-sigreturn.S b/arch/i386/kernel/vsyscall-sigreturn.S index 68afa50dd7cf79..fadb5bc3c37431 100644 --- a/arch/i386/kernel/vsyscall-sigreturn.S +++ b/arch/i386/kernel/vsyscall-sigreturn.S @@ -7,7 +7,7 @@ */ #include -#include +#include /* XXX diff --git a/arch/i386/kernel/vsyscall.lds.S b/arch/i386/kernel/vsyscall.lds.S index a7977707c8e509..98699ca6e52d7b 100644 --- a/arch/i386/kernel/vsyscall.lds.S +++ b/arch/i386/kernel/vsyscall.lds.S @@ -3,7 +3,7 @@ * object prelinked to its virtual address, and with only one read-only * segment (that fits in one page). This script controls its layout. */ -#include +#include SECTIONS { diff --git a/arch/i386/power/swsusp.S b/arch/i386/power/swsusp.S index c4105286ff26fc..c893b897217fa5 100644 --- a/arch/i386/power/swsusp.S +++ b/arch/i386/power/swsusp.S @@ -12,7 +12,7 @@ #include #include #include -#include +#include .text diff --git a/include/asm-i386/thread_info.h b/include/asm-i386/thread_info.h index e2cb9fa6f563db..8fbf791651bf84 100644 --- a/include/asm-i386/thread_info.h +++ b/include/asm-i386/thread_info.h @@ -48,7 +48,7 @@ struct thread_info { #else /* !__ASSEMBLY__ */ -#include +#include #endif