Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>master
Masahiro Yamada
11 years ago
committed by
Tom Rini
parent
34bd050709
commit
ceec4c8746
@ -0,0 +1,278 @@ |
||||
#### |
||||
# kbuild: Generic definitions |
||||
|
||||
# Convenient 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 $@)) |
||||
|
||||
### |
||||
# filename of first prerequisite with directory and extension stripped |
||||
baseprereq = $(basename $(notdir $<)) |
||||
|
||||
### |
||||
# Escape single quote for use in echo statements |
||||
escsq = $(subst $(squote),'\$(squote)',$1) |
||||
|
||||
### |
||||
# Easy method for doing a status message |
||||
kecho := : |
||||
quiet_kecho := echo |
||||
silent_kecho := : |
||||
kecho := $($(quiet)kecho) |
||||
|
||||
### |
||||
# 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; \ |
||||
$(kecho) ' CHK $@'; \ |
||||
mkdir -p $(dir $@); \ |
||||
$(filechk_$(1)) < $< > $@.tmp; \ |
||||
if [ -r $@ ] && cmp -s $@ $@.tmp; then \ |
||||
rm -f $@.tmp; \ |
||||
else \ |
||||
$(kecho) ' UPD $@'; \ |
||||
mv -f $@.tmp $@; \ |
||||
fi |
||||
endef |
||||
|
||||
###### |
||||
# gcc support functions |
||||
# See documentation in Documentation/kbuild/makefiles.txt |
||||
|
||||
# cc-cross-prefix |
||||
# Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-) |
||||
# Return first prefix where a prefix$(CC) is found in PATH. |
||||
# If no $(CC) found in PATH with listed prefixes return nothing |
||||
cc-cross-prefix = \ |
||||
$(word 1, $(foreach c,$(1), \ |
||||
$(shell set -e; \ |
||||
if (which $(strip $(c))$(CC)) > /dev/null 2>&1 ; then \ |
||||
echo $(c); \ |
||||
fi))) |
||||
|
||||
# output directory for tests below |
||||
TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/) |
||||
|
||||
# try-run |
||||
# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise) |
||||
# Exit code chooses option. "$$TMP" is can be used as temporary file and |
||||
# is automatically cleaned up. |
||||
try-run = $(shell set -e; \ |
||||
TMP="$(TMPOUT).$$$$.tmp"; \ |
||||
TMPO="$(TMPOUT).$$$$.o"; \ |
||||
if ($(1)) >/dev/null 2>&1; \ |
||||
then echo "$(2)"; \ |
||||
else echo "$(3)"; \ |
||||
fi; \ |
||||
rm -f "$$TMP" "$$TMPO") |
||||
|
||||
# as-option |
||||
# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,) |
||||
|
||||
as-option = $(call try-run,\ |
||||
$(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o "$$TMP",$(1),$(2)) |
||||
|
||||
# as-instr |
||||
# Usage: cflags-y += $(call as-instr,instr,option1,option2) |
||||
|
||||
as-instr = $(call try-run,\ |
||||
printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3)) |
||||
|
||||
# cc-option |
||||
# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) |
||||
|
||||
cc-option = $(call try-run,\ |
||||
$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2)) |
||||
|
||||
# cc-option-yn |
||||
# Usage: flag := $(call cc-option-yn,-march=winchip-c6) |
||||
cc-option-yn = $(call try-run,\ |
||||
$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n) |
||||
|
||||
# cc-option-align |
||||
# Prefix align with either -falign or -malign |
||||
cc-option-align = $(subst -functions=0,,\ |
||||
$(call cc-option,-falign-functions=0,-malign-functions=0)) |
||||
|
||||
# cc-disable-warning |
||||
# Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable) |
||||
cc-disable-warning = $(call try-run,\ |
||||
$(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1))) |
||||
|
||||
# cc-version |
||||
# Usage gcc-ver := $(call cc-version) |
||||
cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC)) |
||||
|
||||
# cc-fullversion |
||||
# Usage gcc-ver := $(call cc-fullversion) |
||||
cc-fullversion = $(shell $(CONFIG_SHELL) \ |
||||
$(srctree)/scripts/gcc-version.sh -p $(CC)) |
||||
|
||||
# cc-ifversion |
||||
# Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1) |
||||
cc-ifversion = $(shell [ $(call cc-version, $(CC)) $(1) $(2) ] && echo $(3)) |
||||
|
||||
# cc-ldoption |
||||
# Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both) |
||||
cc-ldoption = $(call try-run,\ |
||||
$(CC) $(1) -nostdlib -x c /dev/null -o "$$TMP",$(1),$(2)) |
||||
|
||||
# ld-option |
||||
# Usage: LDFLAGS += $(call ld-option, -X) |
||||
ld-option = $(call try-run,\ |
||||
$(CC) -x c /dev/null -c -o "$$TMPO" ; $(LD) $(1) "$$TMPO" -o "$$TMP",$(1),$(2)) |
||||
|
||||
# ar-option |
||||
# Usage: KBUILD_ARFLAGS := $(call ar-option,D) |
||||
# Important: no spaces around options |
||||
ar-option = $(call try-run, $(AR) rc$(1) "$$TMP",$(1),$(2)) |
||||
|
||||
###### |
||||
|
||||
### |
||||
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj= |
||||
# Usage: |
||||
# $(Q)$(MAKE) $(build)=dir |
||||
build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj |
||||
|
||||
### |
||||
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.modbuiltin obj= |
||||
# Usage: |
||||
# $(Q)$(MAKE) $(modbuiltin)=dir |
||||
modbuiltin := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.modbuiltin obj |
||||
|
||||
# Prefix -I with $(srctree) if it is not an absolute path. |
||||
# skip if -I has no parameter |
||||
addtree = $(if $(patsubst -I%,%,$(1)), \ |
||||
$(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))) |
||||
|
||||
# echo command. |
||||
# Short version is used, if $(quiet) equals `quiet_', otherwise full one. |
||||
echo-cmd = $(if $($(quiet)cmd_$(1)),\ |
||||
echo ' $(call escsq,$($(quiet)cmd_$(1)))$(echo-why)';) |
||||
|
||||
# printing commands |
||||
cmd = @$(echo-cmd) $(cmd_$(1)) |
||||
|
||||
# Add $(obj)/ for paths that are 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 is 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))) ) |
||||
else |
||||
arg-check = $(if $(strip $(cmd_$@)),,1) |
||||
endif |
||||
|
||||
# >'< 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 $$ your perl vars |
||||
make-cmd = $(subst \\,\\\\,$(subst \#,\\\#,$(subst $$,$$$$,$(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 prerequisite(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) or any of the prerequisites 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 |
||||
Loading…
Reference in new issue