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author | Sascha Hauer <s.hauer@pengutronix.de> | 2007-07-05 18:01:13 +0200 |
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committer | Sascha Hauer <sha@octopus.labnet.pengutronix.de> | 2007-07-05 18:01:13 +0200 |
commit | c56078afcc581ab9f3f564702cdbe07ea352c6a7 (patch) | |
tree | 4fe5d175660a263b7a1d66810496ada2a646bbab /scripts/Kbuild.include | |
parent | 88271e5177476a45e7749e29a708c15234b55383 (diff) | |
download | barebox-c56078afcc581ab9f3f564702cdbe07ea352c6a7.tar.gz barebox-c56078afcc581ab9f3f564702cdbe07ea352c6a7.tar.xz |
svn_rev_008
add missing Kconfig
Diffstat (limited to 'scripts/Kbuild.include')
-rw-r--r-- | scripts/Kbuild.include | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include new file mode 100644 index 0000000000..95e7746366 --- /dev/null +++ b/scripts/Kbuild.include @@ -0,0 +1,217 @@ +#### +# kbuild: Generic definitions + +# Convinient variables +comma := , +squote := ' +empty := +space := $(empty) $(empty) + +### +# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o +dot-target = $(dir $@).$(notdir $@) + +### +# The temporary file to save gcc -MD generated dependencies must not +# contain a comma +depfile = $(subst $(comma),_,$(dot-target).d) + +### +# filename of target with directory and extension stripped +basetarget = $(basename $(notdir $@)) + +### +# Escape single quote for use in echo statements +escsq = $(subst $(squote),'\$(squote)',$1) + +### +# filechk is used to check if the content of a generated file is updated. +# Sample usage: +# define filechk_sample +# echo $KERNELRELEASE +# endef +# version.h : Makefile +# $(call filechk,sample) +# The rule defined shall write to stdout the content of the new file. +# The existing file will be compared with the new one. +# - If no file exist it is created +# - If the content differ the new file is used +# - If they are equal no change, and no timestamp update +# - stdin is piped in from the first prerequisite ($<) so one has +# to specify a valid file as first prerequisite (often the kbuild file) +define filechk + $(Q)set -e; \ + echo ' CHK $@'; \ + mkdir -p $(dir $@); \ + $(filechk_$(1)) < $< > $@.tmp; \ + if [ -r $@ ] && cmp -s $@ $@.tmp; then \ + rm -f $@.tmp; \ + else \ + echo ' UPD $@'; \ + mv -f $@.tmp $@; \ + fi +endef + +###### +# gcc support functions +# See documentation in Documentation/kbuild/makefiles.txt + +# output directory for tests below +TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/) + +# as-option +# Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,) + +as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \ + -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \ + else echo "$(2)"; fi ;) + +# as-instr +# Usage: cflags-y += $(call as-instr, instr, option1, option2) + +as-instr = $(shell if echo -e "$(1)" | \ + $(CC) $(AFLAGS) -c -xassembler - \ + -o $(TMPOUT)astest$$$$.out > /dev/null 2>&1; \ + then rm $(TMPOUT)astest$$$$.out; echo "$(2)"; \ + else echo "$(3)"; fi) + +# cc-option +# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586) + +cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ + > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) + +# cc-option-yn +# Usage: flag := $(call cc-option-yn, -march=winchip-c6) +cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ + > /dev/null 2>&1; then echo "y"; else echo "n"; fi;) + +# cc-option-align +# Prefix align with either -falign or -malign +cc-option-align = $(subst -functions=0,,\ + $(call cc-option,-falign-functions=0,-malign-functions=0)) + +# cc-version +# Usage gcc-ver := $(call cc-version, $(CC)) +cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC)) + +# cc-ifversion +# Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1) +cc-ifversion = $(shell if [ $(call cc-version, $(CC)) $(1) $(2) ]; then \ + echo $(3); fi;) + +# ld-option +# Usage: ldflags += $(call ld-option, -Wl$(comma)--hash-style=both) +ld-option = $(shell if $(CC) $(1) -nostdlib -xc /dev/null \ + -o $(TMPOUT)ldtest$$$$.out > /dev/null 2>&1; \ + then rm $(TMPOUT)ldtest$$$$.out; echo "$(1)"; \ + else echo "$(2)"; fi) + +### +# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj= +# Usage: +# $(Q)$(MAKE) $(build)=dir +build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj + +# Prefix -I with $(srctree) if it is not an absolute path +addtree = $(if $(filter-out -I/%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1))) $(1) +# Find all -I options and call addtree +flags = $(foreach o,$($(1)),$(if $(filter -I%,$(o)),$(call addtree,$(o)),$(o))) + +# If quiet is set, only print short version of command +cmd = @$(echo-cmd) $(cmd_$(1)) + +# Add $(obj)/ for paths that is not absolute +objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o))) + +### +# if_changed - execute command if any prerequisite is newer than +# target, or command line has changed +# if_changed_dep - as if_changed, but uses fixdep to reveal dependencies +# including used config symbols +# if_changed_rule - as if_changed but execute rule instead +# See Documentation/kbuild/makefiles.txt for more info + +ifneq ($(KBUILD_NOCMDDEP),1) +# Check if both arguments has same arguments. Result in empty string if equal +# User may override this check using make KBUILD_NOCMDDEP=1 +arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \ + $(filter-out $(cmd_$@), $(cmd_$(1))) ) +endif + +# echo command. Short version is $(quiet) equals quiet, otherwise full command +echo-cmd = $(if $($(quiet)cmd_$(1)), \ + echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';) + +# >'< substitution is for echo to work, +# >$< substitution to preserve $ when reloading .cmd file +# note: when using inline perl scripts [perl -e '...$$t=1;...'] +# in $(cmd_xxx) double $$ your perl vars +make-cmd = $(subst \#,\\\#,$(subst $$,$$$$,$(call escsq,$(cmd_$(1))))) + +# Find any prerequisites that is newer than target or that does not exist. +# PHONY targets skipped in both cases. +any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^) + +# Execute command if command has changed or prerequisitei(s) are updated +# +if_changed = $(if $(strip $(any-prereq) $(arg-check)), \ + @set -e; \ + $(echo-cmd) $(cmd_$(1)); \ + echo 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd) + +# 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;\ + rm -f $(depfile); \ + mv -f $(dot-target).tmp $(dot-target).cmd) + +# Usage: $(call if_changed_rule,foo) +# will check if $(cmd_foo) changed, or any of the prequisites changed, +# and if so will execute $(rule_foo) +if_changed_rule = $(if $(strip $(any-prereq) $(arg-check) ), \ + @set -e; \ + $(rule_$(1))) + +### +# why - tell why a a target got build +# enabled by make V=2 +# Output (listed in the order they are checked): +# (1) - due to target is PHONY +# (2) - due to target missing +# (3) - due to: file1.h file2.h +# (4) - due to command line change +# (5) - due to missing .cmd file +# (6) - due to target not in $(targets) +# (1) PHONY targets are always build +# (2) No target, so we better build it +# (3) Prerequisite is newer than target +# (4) The command line stored in the file named dir/.target.cmd +# differed from actual command line. This happens when compiler +# options changes +# (5) No dir/.target.cmd file (used to store command line) +# (6) No dir/.target.cmd file and target not listed in $(targets) +# This is a good hint that there is a bug in the kbuild file +ifeq ($(KBUILD_VERBOSE),2) +why = \ + $(if $(filter $@, $(PHONY)),- due to target is PHONY, \ + $(if $(wildcard $@), \ + $(if $(strip $(any-prereq)),- due to: $(any-prereq), \ + $(if $(arg-check), \ + $(if $(cmd_$@),- due to command line change, \ + $(if $(filter $@, $(targets)), \ + - due to missing .cmd file, \ + - due to $(notdir $@) not in $$(targets) \ + ) \ + ) \ + ) \ + ), \ + - due to target missing \ + ) \ + ) + +echo-why = $(call escsq, $(strip $(why))) +endif |