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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
13comma := ,
14squote := '
15
16###
17# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
18dot-target = $(dir $@).$(notdir $@)
19
20###
21# filename of target with directory and extension stripped
22basetarget = $(basename $(notdir $@))
23
24###
25# The temporary file to save gcc -MD generated dependencies must not
26# contain a comma
27depfile = $(subst $(comma),_,$(dot-target).d)
28
29###
30# Check if both arguments has same arguments. Result is empty string if equal.
31arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
32 $(filter-out $(cmd_$@), $(cmd_$(1))) )
33
34###
35# Escape single quote for use in echo statements
36escsq = $(subst $(squote),'\$(squote)',$1)
37
38# Echo command
39# Short version is used, if $(quiet) equals `quiet_', otherwise full one.
40echo-cmd = $(if $($(quiet)cmd_$(1)),\
41 echo ' $(call escsq,$($(quiet)cmd_$(1)))';)
42
43###
44# Replace >$< with >$$< to preserve $ when reloading the .cmd file
45# (needed for make)
46# Replace >#< with >\#< to avoid starting a comment in the .cmd file
47# (needed for make)
48# Replace >'< with >'\''< to be able to enclose the whole string in '...'
49# (needed for the shell)
50make-cmd = $(call escsq,$(subst \#,\\\#,$(subst $$,$$$$,$(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.
55any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
56
57###
58# Copy dependency data into .cmd file
59# - gcc -M dependency info
60# - command line to create object 'cmd_object :='
61dep-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; \
68 printf '\n%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd)
69
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
74if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)), \
75 @set -e; \
76 $(echo-cmd) $(cmd_$(1)) && $(dep-cmd))
77
78# if_changed - execute command if any prerequisite is newer than
79# target, or command line has changed
80if_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)
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
92c_flags_1 = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj))
93c_flags_2 = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(c_flags_1))
94c_flags = $(filter-out $(CFLAGS_REMOVE_$(obj)), $(c_flags_2))
95cxx_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXXFLAGS_$(basetarget).o) $(CXXFLAGS_$(obj))
96
97###
98## HOSTCC C flags
99
100host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CHOSTFLAGS) -D"BUILD_STR(s)=\#s" $(CHOSTFLAGS_$(basetarget).o) $(CHOSTFLAGS_$(obj))
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
13comma := ,
14squote := '
15pound := \#
16
17###
18# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
19dot-target = $(dir $@).$(notdir $@)
20
21###
22# filename of target with directory and extension stripped
23basetarget = $(basename $(notdir $@))
24
25###
26# The temporary file to save gcc -MD generated dependencies must not
27# contain a comma
28depfile = $(subst $(comma),_,$(dot-target).d)
29
30###
31# Check if both arguments has same arguments. Result is empty string if equal.
32arg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \
33 $(filter-out $(cmd_$@), $(cmd_$(1))) )
34
35###
36# Escape single quote for use in echo statements
37escsq = $(subst $(squote),'\$(squote)',$1)
38
39# Echo command
40# Short version is used, if $(quiet) equals `quiet_', otherwise full one.
41echo-cmd = $(if $($(quiet)cmd_$(1)),\
42 echo ' $(call escsq,$($(quiet)cmd_$(1)))';)
43
44###
45# Replace >$< with >$$< to preserve $ when reloading the .cmd file
46# (needed for make)
47# Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file
48# (needed for make)
49# Replace >'< with >'\''< to be able to enclose the whole string in '...'
50# (needed for the shell)
51make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))))
52
53###
54# Find any prerequisites that is newer than target or that does not exist.
55# PHONY targets skipped in both cases.
56any-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^)
57
58###
59# Copy dependency data into .cmd file
60# - gcc -M dependency info
61# - command line to create object 'cmd_object :='
62dep-cmd = $(if $(wildcard $(fixdep)), \
63 $(fixdep) $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp; \
64 rm -f $(depfile); \
65 mv -f $(dot-target).tmp $(dot-target).cmd, \
66 printf '\# cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
67 printf '\# using basic dep data\n\n' >> $(dot-target).cmd; \
68 cat $(depfile) >> $(dot-target).cmd; \
69 printf '\n%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd)
70
71###
72# if_changed_dep - execute command if any prerequisite is newer than
73# target, or command line has changed and update
74# dependencies in the cmd file
75if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)), \
76 @set -e; \
77 $(echo-cmd) $(cmd_$(1)) && $(dep-cmd))
78
79# if_changed - execute command if any prerequisite is newer than
80# target, or command line has changed
81if_changed = $(if $(strip $(any-prereq) $(arg-check)), \
82 @set -e; \
83 $(echo-cmd) $(cmd_$(1)); \
84 printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
85
86###
87# C flags to be used in rule definitions, includes:
88# - depfile generation
89# - global $(CFLAGS)
90# - per target C flags
91# - per object C flags
92# - BUILD_STR macro to allow '-D"$(variable)"' constructs
93c_flags_1 = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj))
94c_flags_2 = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(c_flags_1))
95c_flags = $(filter-out $(CFLAGS_REMOVE_$(obj)), $(c_flags_2))
96cxx_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXXFLAGS_$(basetarget).o) $(CXXFLAGS_$(obj))
97
98###
99## HOSTCC C flags
100
101host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CHOSTFLAGS) -D"BUILD_STR(s)=\#s" $(CHOSTFLAGS_$(basetarget).o) $(CHOSTFLAGS_$(obj))