1c819e2cfSJiri Olsa### 2c819e2cfSJiri Olsa# build: Generic definitions 3c819e2cfSJiri Olsa# 4c819e2cfSJiri Olsa# Lots of this code have been borrowed or heavily inspired from parts 5c819e2cfSJiri Olsa# of kbuild code, which is not credited, but mostly developed by: 6c819e2cfSJiri Olsa# 7c819e2cfSJiri Olsa# Copyright (C) Sam Ravnborg <sam@mars.ravnborg.org>, 2015 8c819e2cfSJiri Olsa# Copyright (C) Linus Torvalds <torvalds@linux-foundation.org>, 2015 9c819e2cfSJiri Olsa# 10c819e2cfSJiri Olsa 11c819e2cfSJiri Olsa### 12c819e2cfSJiri Olsa# Convenient variables 13c819e2cfSJiri Olsacomma := , 14c819e2cfSJiri Olsasquote := ' 159564a8cfSRasmus Villemoespound := \# 16*4a73aff8SCharlie Jenkinsempty := 17*4a73aff8SCharlie Jenkinsspace := $(empty) $(empty) 18c819e2cfSJiri Olsa 19c819e2cfSJiri Olsa### 20c819e2cfSJiri Olsa# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o 21c819e2cfSJiri Olsadot-target = $(dir $@).$(notdir $@) 22c819e2cfSJiri Olsa 23c819e2cfSJiri Olsa### 24c819e2cfSJiri Olsa# filename of target with directory and extension stripped 25c819e2cfSJiri Olsabasetarget = $(basename $(notdir $@)) 26c819e2cfSJiri Olsa 27c819e2cfSJiri Olsa### 28c819e2cfSJiri Olsa# The temporary file to save gcc -MD generated dependencies must not 29c819e2cfSJiri Olsa# contain a comma 30c819e2cfSJiri Olsadepfile = $(subst $(comma),_,$(dot-target).d) 31c819e2cfSJiri Olsa 32c819e2cfSJiri Olsa### 33c819e2cfSJiri Olsa# Check if both arguments has same arguments. Result is empty string if equal. 34c819e2cfSJiri Olsaarg-check = $(strip $(filter-out $(cmd_$(1)), $(cmd_$@)) \ 35c819e2cfSJiri Olsa $(filter-out $(cmd_$@), $(cmd_$(1))) ) 36c819e2cfSJiri Olsa 37c819e2cfSJiri Olsa### 38c819e2cfSJiri Olsa# Escape single quote for use in echo statements 39c819e2cfSJiri Olsaescsq = $(subst $(squote),'\$(squote)',$1) 40c819e2cfSJiri Olsa 41c819e2cfSJiri Olsa# Echo command 42c819e2cfSJiri Olsa# Short version is used, if $(quiet) equals `quiet_', otherwise full one. 43c819e2cfSJiri Olsaecho-cmd = $(if $($(quiet)cmd_$(1)),\ 44c819e2cfSJiri Olsa echo ' $(call escsq,$($(quiet)cmd_$(1)))';) 45c819e2cfSJiri Olsa 46c819e2cfSJiri Olsa### 47c819e2cfSJiri Olsa# Replace >$< with >$$< to preserve $ when reloading the .cmd file 48c819e2cfSJiri Olsa# (needed for make) 499564a8cfSRasmus Villemoes# Replace >#< with >$(pound)< to avoid starting a comment in the .cmd file 50c819e2cfSJiri Olsa# (needed for make) 51c819e2cfSJiri Olsa# Replace >'< with >'\''< to be able to enclose the whole string in '...' 52c819e2cfSJiri Olsa# (needed for the shell) 539564a8cfSRasmus Villemoesmake-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1))))) 54c819e2cfSJiri Olsa 55c819e2cfSJiri Olsa### 56c819e2cfSJiri Olsa# Find any prerequisites that is newer than target or that does not exist. 57c819e2cfSJiri Olsa# PHONY targets skipped in both cases. 58c819e2cfSJiri Olsaany-prereq = $(filter-out $(PHONY),$?) $(filter-out $(PHONY) $(wildcard $^),$^) 59c819e2cfSJiri Olsa 60c819e2cfSJiri Olsa### 61275e2d95SJiri Olsa# Copy dependency data into .cmd file 62275e2d95SJiri Olsa# - gcc -M dependency info 63275e2d95SJiri Olsa# - command line to create object 'cmd_object :=' 649fb81323SJiri Olsadep-cmd = $(if $(wildcard $(fixdep)), \ 659fb81323SJiri Olsa $(fixdep) $(depfile) $@ '$(make-cmd)' > $(dot-target).tmp; \ 669fb81323SJiri Olsa rm -f $(depfile); \ 679fb81323SJiri Olsa mv -f $(dot-target).tmp $(dot-target).cmd, \ 689feeb638SPaul Menzel printf '$(pound) cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \ 699feeb638SPaul Menzel printf '$(pound) using basic dep data\n\n' >> $(dot-target).cmd; \ 709fb81323SJiri Olsa cat $(depfile) >> $(dot-target).cmd; \ 71a5ba0a1aSJiri Olsa printf '\n%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd) 72275e2d95SJiri Olsa 73275e2d95SJiri Olsa### 74c819e2cfSJiri Olsa# if_changed_dep - execute command if any prerequisite is newer than 75c819e2cfSJiri Olsa# target, or command line has changed and update 76c819e2cfSJiri Olsa# dependencies in the cmd file 77c819e2cfSJiri Olsaif_changed_dep = $(if $(strip $(any-prereq) $(arg-check)), \ 78c819e2cfSJiri Olsa @set -e; \ 79a278f3d8SAndrii Nakryiko $(echo-cmd) $(cmd_$(1)); \ 80a278f3d8SAndrii Nakryiko $(dep-cmd)) 81c819e2cfSJiri Olsa 82c819e2cfSJiri Olsa# if_changed - execute command if any prerequisite is newer than 83c819e2cfSJiri Olsa# target, or command line has changed 84c819e2cfSJiri Olsaif_changed = $(if $(strip $(any-prereq) $(arg-check)), \ 85c819e2cfSJiri Olsa @set -e; \ 86c819e2cfSJiri Olsa $(echo-cmd) $(cmd_$(1)); \ 87c819e2cfSJiri Olsa printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd) 88c819e2cfSJiri Olsa 89c819e2cfSJiri Olsa### 90c819e2cfSJiri Olsa# C flags to be used in rule definitions, includes: 91c819e2cfSJiri Olsa# - depfile generation 92c819e2cfSJiri Olsa# - global $(CFLAGS) 93c819e2cfSJiri Olsa# - per target C flags 94c819e2cfSJiri Olsa# - per object C flags 95c819e2cfSJiri Olsa# - BUILD_STR macro to allow '-D"$(variable)"' constructs 96baa1973eSPeter Foleyc_flags_1 = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj)) 972ec8107dSJiri Olsac_flags_2 = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(c_flags_1)) 982ec8107dSJiri Olsac_flags = $(filter-out $(CFLAGS_REMOVE_$(obj)), $(c_flags_2)) 99baa1973eSPeter Foleycxx_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXXFLAGS_$(basetarget).o) $(CXXFLAGS_$(obj)) 1000c3b7e42SJiri Olsa 1010c3b7e42SJiri Olsa### 1020c3b7e42SJiri Olsa## HOSTCC C flags 1030c3b7e42SJiri Olsa 104c77a78c2SJohn Garryhost_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(HOSTCFLAGS) -D"BUILD_STR(s)=\#s" $(HOSTCFLAGS_$(basetarget).o) $(HOSTCFLAGS_$(obj)) 105b61442dfSMasahiro Yamada 106b61442dfSMasahiro Yamada# output directory for tests below 107b61442dfSMasahiro YamadaTMPOUT = .tmp_$$$$ 108b61442dfSMasahiro Yamada 109b61442dfSMasahiro Yamada# try-run 110b61442dfSMasahiro Yamada# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise) 111b61442dfSMasahiro Yamada# Exit code chooses option. "$$TMP" serves as a temporary file and is 112b61442dfSMasahiro Yamada# automatically cleaned up. 113b61442dfSMasahiro Yamadatry-run = $(shell set -e; \ 114b61442dfSMasahiro Yamada TMP=$(TMPOUT)/tmp; \ 115b61442dfSMasahiro Yamada mkdir -p $(TMPOUT); \ 116b61442dfSMasahiro Yamada trap "rm -rf $(TMPOUT)" EXIT; \ 117b61442dfSMasahiro Yamada if ($(1)) >/dev/null 2>&1; \ 118b61442dfSMasahiro Yamada then echo "$(2)"; \ 119b61442dfSMasahiro Yamada else echo "$(3)"; \ 120b61442dfSMasahiro Yamada fi) 121b61442dfSMasahiro Yamada 122b61442dfSMasahiro Yamada# cc-option 123b61442dfSMasahiro Yamada# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586) 124b61442dfSMasahiro Yamadacc-option = $(call try-run, \ 125b61442dfSMasahiro Yamada $(CC) -Werror $(1) -c -x c /dev/null -o "$$TMP",$(1),$(2)) 126b61442dfSMasahiro Yamada 127b61442dfSMasahiro Yamada# delete partially updated (i.e. corrupted) files on error 128b61442dfSMasahiro Yamada.DELETE_ON_ERROR: 129