[mirror_ubuntu-artful-kernel.git] / tools / build / Build.include

###
# build: Generic definitions
#
#  Lots of this code have been borrowed or heavily inspired from parts
#  of kbuild code, which is not credited, but mostly developed by:
#
#  Copyright (C) Sam Ravnborg <sam@mars.ravnborg.org>, 2015
#  Copyright (C) Linus Torvalds <torvalds@linux-foundation.org>, 2015
#

###
# Convenient variables
comma   := ,
squote  := '

###
# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
dot-target = $(dir $@).$(notdir $@)

###
# filename of target with directory and extension stripped
basetarget = $(basename $(notdir $@))

###
# The temporary file to save gcc -MD generated dependencies must not
# contain a comma
depfile = $(subst $(comma),_,$(dot-target).d)

###
# Check if both arguments has same arguments. Result is empty string if equal.
arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
                    $(filter-out $(cmd_$@),   $(cmd_$(1))) )

###
# Escape single quote for use in echo statements
escsq = $(subst $(squote),'\$(squote)',$1)

# 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)))';)

###
# Replace >$< with >$$< to preserve $ when reloading the .cmd file
# (needed for make)
# Replace >#< with >\#< to avoid starting a comment in the .cmd file
# (needed for make)
# Replace >'< with >'\''< to be able to enclose the whole string in '...'
# (needed for the shell)
make-cmd = $(call escsq,$(subst \#,\\\#,$(subst $$,$$$$,$(cmd_$(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 $^),$^)

###
# Copy dependency data into .cmd file
#  - gcc -M dependency info
#  - command line to create object 'cmd_object :='
dep-cmd = $(if $(wildcard $(fixdep)),                                           \
           $(fixdep) $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp;           \
           rm -f $(depfile);                                                    \
           mv -f $(dot-target).tmp $(dot-target).cmd,                           \
           printf '\# cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
           printf '\# using basic dep data\n\n' >> $(dot-target).cmd;           \
           cat $(depfile) >> $(dot-target).cmd;                                 \
           printf '\n%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd)

###
# if_changed_dep  - execute command if any prerequisite is newer than
#                   target, or command line has changed and update
#                   dependencies in the cmd file
if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)),         \
                  @set -e;                                         \
                  $(echo-cmd) $(cmd_$(1)) && $(dep-cmd))

# if_changed      - execute command if any prerequisite is newer than
#                   target, or command line has changed
if_changed = $(if $(strip $(any-prereq) $(arg-check)),                   \
              @set -e;                                                   \
              $(echo-cmd) $(cmd_$(1));                                   \
              printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)

###
# C flags to be used in rule definitions, includes:
# - depfile generation
# - global $(CFLAGS)
# - per target C flags
# - per object C flags
# - BUILD_STR macro to allow '-D"$(variable)"' constructs
c_flags_1 = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj))
c_flags_2 = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(c_flags_1))
c_flags   = $(filter-out $(CFLAGS_REMOVE_$(obj)), $(c_flags_2))
cxx_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXXFLAGS_$(basetarget).o) $(CXXFLAGS_$(obj))

###
## HOSTCC C flags

host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CHOSTFLAGS) -D"BUILD_STR(s)=\#s" $(CHOSTFLAGS_$(basetarget).o) $(CHOSTFLAGS_$(obj))
Commit	Line	Data
c819e2cf JO	1	###
	2	# build: Generic definitions
	3	#
	4	# Lots of this code have been borrowed or heavily inspired from parts
	5	# of kbuild code, which is not credited, but mostly developed by:
	6	#
	7	# Copyright (C) Sam Ravnborg <sam@mars.ravnborg.org>, 2015
	8	# Copyright (C) Linus Torvalds <torvalds@linux-foundation.org>, 2015
	9	#
	10
	11	###
	12	# Convenient variables
	13	comma := ,
	14	squote := '
	15
	16	###
	17	# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
	18	dot-target = $(dir $@).$(notdir $@)
	19
	20	###
	21	# filename of target with directory and extension stripped
	22	basetarget = $(basename $(notdir $@))
	23
	24	###
	25	# The temporary file to save gcc -MD generated dependencies must not
	26	# contain a comma
	27	depfile = $(subst $(comma),_,$(dot-target).d)
	28
	29	###
	30	# Check if both arguments has same arguments. Result is empty string if equal.
	31	arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
	32	$(filter-out $(cmd_$@), $(cmd_$(1))) )
	33
	34	###
	35	# Escape single quote for use in echo statements
	36	escsq = $(subst $(squote),'\$(squote)',$1)
	37
	38	# Echo command
	39	# Short version is used, if $(quiet) equals `quiet_', otherwise full one.
	40	echo-cmd = $(if $($(quiet)cmd_$(1)),\
	41	echo ' $(call escsq,$($(quiet)cmd_$(1)))';)
	42
	43	###
	44	# Replace >$< with >$$< to preserve $ when reloading the .cmd file
	45	# (needed for make)
	46	# Replace >#< with >\#< to avoid starting a comment in the .cmd file
	47	# (needed for make)
	48	# Replace >'< with >'\''< to be able to enclose the whole string in '...'
	49	# (needed for the shell)
	50	make-cmd = $(call escsq,$(subst \#,\\\#,$(subst $$,$$$$,$(cmd_$(1)))))
	51
	52	###
	53	# Find any prerequisites that is newer than target or that does not exist.
	54	# PHONY targets skipped in both cases.
	55	any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
	56
275e2d95 JO	57	###
	58	# Copy dependency data into .cmd file
	59	# - gcc -M dependency info
	60	# - command line to create object 'cmd_object :='
9fb81323 JO	61	dep-cmd = $(if $(wildcard $(fixdep)), \
	62	$(fixdep) $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp; \
	63	rm -f $(depfile); \
	64	mv -f $(dot-target).tmp $(dot-target).cmd, \
	65	printf '\# cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
	66	printf '\# using basic dep data\n\n' >> $(dot-target).cmd; \
	67	cat $(depfile) >> $(dot-target).cmd; \
a5ba0a1a	68	printf '\n%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd)
275e2d95	69
c819e2cf JO	70	###
	71	# if_changed_dep - execute command if any prerequisite is newer than
	72	# target, or command line has changed and update
	73	# dependencies in the cmd file
	74	if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)), \
2fedf79b JO	75	@set -e; \
2fedf79b JO	76	$(echo-cmd) $(cmd_$(1)) && $(dep-cmd))
c819e2cf JO	77
	78	# if_changed - execute command if any prerequisite is newer than
	79	# target, or command line has changed
2fedf79b JO	80	if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
	81	@set -e; \
	82	$(echo-cmd) $(cmd_$(1)); \
	83	printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
c819e2cf JO	84
	85	###
	86	# C flags to be used in rule definitions, includes:
	87	# - depfile generation
	88	# - global $(CFLAGS)
	89	# - per target C flags
	90	# - per object C flags
	91	# - BUILD_STR macro to allow '-D"$(variable)"' constructs
baa1973e	92	c_flags_1 = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj))
2ec8107d JO	93	c_flags_2 = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(c_flags_1))
2ec8107d JO	94	c_flags = $(filter-out $(CFLAGS_REMOVE_$(obj)), $(c_flags_2))
baa1973e	95	cxx_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXXFLAGS_$(basetarget).o) $(CXXFLAGS_$(obj))
0c3b7e42 JO	96
	97	###
	98	## HOSTCC C flags
	99
baa1973e	100	host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CHOSTFLAGS) -D"BUILD_STR(s)=\#s" $(CHOSTFLAGS_$(basetarget).o) $(CHOSTFLAGS_$(obj))