From 2b3371f892caec9132ccf605d370441d57bf64b6 Mon Sep 17 00:00:00 2001 From: John Rigby Date: Tue, 10 Jan 2012 12:01:41 -0700 Subject: KBuild: Allow scripts/* to be cross compiled Cross compiling the binaries in scripts/* is not possible because various makefiles assume that $(obj)/whatever is executable on the build host. This patch introduces a new variable called KBUILD_SCRIPTROOT that points to script/binaries to use while cross compiling. Usage: Build scripts for the build host: make O=path/to/buildhost/buildscripts \ silentoldconfig prepare scripts Then cross build script for target: make O=path/to/target/buildscripts \ HOSTCC=$CROSS_COMPILE \ KBUILD_SCRIPTROOT=path/to/buildhost/buildscripts silentoldconfig prepare scripts This patch does not use KBUILD_SCRIPTROOT for all script invocations it only redefines the following if KBUILD_SCRIPTROOT is defined. scripts/Makefile.build scripts/basic/fixdep --> $(KBUILD_SCRIPTROOT)/scripts/basic/fixdep scripts/kconfig/Makefile $(obj)/conf --> $(KBUILD_SCRIPTROOT)/scripts/kconfig/conf scripts/mod/Makefile $(obj)mk_elfconfig --> $(KBUILD_SCRIPTROOT)/scripts/mod/mk_elfconfig Signed-off-by: John Rigby --- scripts/Kbuild.include | 6 +++++- scripts/Makefile.build | 6 +++++- scripts/kconfig/Makefile | 28 +++++++++++++++++----------- scripts/mod/Makefile | 10 ++++++++-- 4 files changed, 35 insertions(+), 15 deletions(-) diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 6a3ee981931..ab0b6358253 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -222,11 +222,15 @@ if_changed = $(if $(strip $(any-prereq) $(arg-check)), \ $(echo-cmd) $(cmd_$(1)); \ echo 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd) +ifeq ($(KBUILD_SCRIPTROOT),) +KBUILD_SCRIPTROOT=. +endif + # Execute the command and also postprocess generated .d dependencies file. if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \ @set -e; \ $(echo-cmd) $(cmd_$(1)); \ - scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\ + $(KBUILD_SCRIPTROOT)/scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;\ rm -f $(depfile); \ mv -f $(dot-target).tmp $(dot-target).cmd) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index ff1720d28d0..bf8d650f0aa 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -290,13 +290,17 @@ cmd_record_mcount = \ fi; endif +ifeq ($(KBUILD_SCRIPTROOT),) +KBUILD_SCRIPTROOT=. +endif + define rule_cc_o_c $(call echo-cmd,checksrc) $(cmd_checksrc) \ $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \ $(cmd_modversions) \ $(call echo-cmd,record_mcount) \ $(cmd_record_mcount) \ - scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ + $(KBUILD_SCRIPTROOT)/scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > \ $(dot-target).tmp; \ rm -f $(depfile); \ mv -f $(dot-target).tmp $(dot-target).cmd diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile index 79662658fb9..ae6eb070eb7 100644 --- a/scripts/kconfig/Makefile +++ b/scripts/kconfig/Makefile @@ -11,6 +11,12 @@ else Kconfig := Kconfig endif +ifdef KBUILD_SCRIPTROOT +CONF = $(KBUILD_SCRIPTROOT)/scripts/kconfig/conf +else +CONF = $(obj)/conf +endif + xconfig: $(obj)/qconf $< $(Kconfig) @@ -20,31 +26,31 @@ gconfig: $(obj)/gconf menuconfig: $(obj)/mconf $< $(Kconfig) -config: $(obj)/conf +config: $(CONF) $< --oldaskconfig $(Kconfig) nconfig: $(obj)/nconf $< $(Kconfig) -oldconfig: $(obj)/conf +oldconfig: $(CONF) $< --$@ $(Kconfig) -silentoldconfig: $(obj)/conf +silentoldconfig: $(CONF) $(Q)mkdir -p include/generated $< --$@ $(Kconfig) -localyesconfig localmodconfig: $(obj)/streamline_config.pl $(obj)/conf +localyesconfig localmodconfig: $(obj)/streamline_config.pl $(CONF) $(Q)mkdir -p include/generated $(Q)perl $< --$@ $(srctree) $(Kconfig) > .tmp.config $(Q)if [ -f .config ]; then \ cmp -s .tmp.config .config || \ (mv -f .config .config.old.1; \ mv -f .tmp.config .config; \ - $(obj)/conf --silentoldconfig $(Kconfig); \ + $(CONF) --silentoldconfig $(Kconfig); \ mv -f .config.old.1 .config.old) \ else \ mv -f .tmp.config .config; \ - $(obj)/conf --silentoldconfig $(Kconfig); \ + $(CONF) --silentoldconfig $(Kconfig); \ fi $(Q)rm -f .tmp.config @@ -73,18 +79,18 @@ update-po-config: $(obj)/kxgettext $(obj)/gconf.glade.h PHONY += allnoconfig allyesconfig allmodconfig alldefconfig randconfig -allnoconfig allyesconfig allmodconfig alldefconfig randconfig: $(obj)/conf +allnoconfig allyesconfig allmodconfig alldefconfig randconfig: $(CONF) $< --$@ $(Kconfig) PHONY += listnewconfig oldnoconfig savedefconfig defconfig -listnewconfig oldnoconfig: $(obj)/conf +listnewconfig oldnoconfig: $(CONF) $< --$@ $(Kconfig) -savedefconfig: $(obj)/conf +savedefconfig: $(CONF) $< --$@=defconfig $(Kconfig) -defconfig: $(obj)/conf +defconfig: $(CONF) ifeq ($(KBUILD_DEFCONFIG),) $< --defconfig $(Kconfig) else @@ -92,7 +98,7 @@ else $(Q)$< --defconfig=arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG) $(Kconfig) endif -%_defconfig: $(obj)/conf +%_defconfig: $(CONF) $(Q)$< --defconfig=arch/$(SRCARCH)/configs/$@ $(Kconfig) # Help text used by make help diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile index ff954f8168c..258d4ba32d5 100644 --- a/scripts/mod/Makefile +++ b/scripts/mod/Makefile @@ -1,6 +1,12 @@ hostprogs-y := modpost mk_elfconfig always := $(hostprogs-y) empty.o +ifdef KBUILD_SCRIPTROOT +MKELFCONFIG = $(KBUILD_SCRIPTROOT)/scripts/mod/mk_elfconfig +else +MKELFCONFIG = $(obj)/mk_elfconfig +endif + modpost-objs := modpost.o file2alias.o sumversion.o # dependencies on generated files need to be listed explicitly @@ -8,9 +14,9 @@ modpost-objs := modpost.o file2alias.o sumversion.o $(obj)/modpost.o $(obj)/file2alias.o $(obj)/sumversion.o: $(obj)/elfconfig.h quiet_cmd_elfconfig = MKELF $@ - cmd_elfconfig = $(obj)/mk_elfconfig < $< > $@ + cmd_elfconfig = $(MKELFCONFIG) < $< > $@ -$(obj)/elfconfig.h: $(obj)/empty.o $(obj)/mk_elfconfig FORCE +$(obj)/elfconfig.h: $(obj)/empty.o $(MKELFCONFIG) FORCE $(call if_changed,elfconfig) targets += elfconfig.h -- cgit v1.2.3