X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=scripts%2FKbuild.include;h=06c1a377c4c515e10b0e31c14ab868a80f7aeaa5;hb=458337dbb120d33f326e2b19d54eca8cf179b5c0;hp=3d523899fdc05dc56e5a2eb6c18e88b26390d102;hpb=2dc94310bd94d0906febea7d0f7c188da620c952;p=powerpc.git diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 3d523899fd..06c1a377c4 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -1,7 +1,7 @@ #### # kbuild: Generic definitions -# Convinient variables +# Convenient variables comma := , squote := ' empty := @@ -56,23 +56,43 @@ endef # gcc support functions # See documentation in Documentation/kbuild/makefiles.txt +# 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).$$$$.tmp"; \ + if ($(1)) >/dev/null 2>&1; \ + then echo "$(2)"; \ + else echo "$(3)"; \ + fi; \ + rm -f "$$TMP") + # as-option -# Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,) +# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,) + +as-option = $(call try-run,\ + $(CC) $(CFLAGS) $(1) -c -xassembler /dev/null -o "$$TMP",$(1),$(2)) + +# as-instr +# Usage: cflags-y += $(call as-instr,instr,option1,option2) -as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \ - -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \ - else echo "$(2)"; fi ;) +as-instr = $(call try-run,\ + echo -e "$(1)" | $(CC) $(AFLAGS) -c -xassembler -o "$$TMP" -,$(2),$(3)) # cc-option -# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586) +# 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 = $(call try-run,\ + $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o "$$TMP",$(1),$(2)) # cc-option-yn -# Usage: flag := $(call cc-option-yn, -march=winchip-c6) -cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ - > /dev/null 2>&1; then echo "y"; else echo "n"; fi;) +# Usage: flag := $(call cc-option-yn,-march=winchip-c6) +cc-option-yn = $(call try-run,\ + $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o "$$TMP",y,n) # cc-option-align # Prefix align with either -falign or -malign @@ -80,20 +100,19 @@ cc-option-align = $(subst -functions=0,,\ $(call cc-option,-falign-functions=0,-malign-functions=0)) # cc-version -# Usage gcc-ver := $(call cc-version, $(CC)) +# 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;) +cc-ifversion = $(shell [ $(call cc-version, $(CC)) $(1) $(2) ] && echo $(3)) # ld-option # Usage: ldflags += $(call ld-option, -Wl$(comma)--hash-style=both) -ld-option = $(shell if $(CC) $(1) \ - -nostdlib -o ldtest$$$$.out -xc /dev/null \ - > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi; \ - rm -f ldtest$$$$.out) +ld-option = $(call try-run,\ + $(CC) $(1) -nostdlib -xc /dev/null -o "$$TMP",$(1),$(2)) + +###### ### # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj= @@ -101,19 +120,25 @@ ld-option = $(shell if $(CC) $(1) \ # $(Q)$(MAKE) $(build)=dir build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj -# Prefix -I with $(srctree) if it is not an absolute path +# 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 +# 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 is not absolute +# 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 +# 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 @@ -121,16 +146,12 @@ objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o))) # See Documentation/kbuild/makefiles.txt for more info ifneq ($(KBUILD_NOCMDDEP),1) -# Check if both arguments has same arguments. Result in empty string if equal +# 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))) ) 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 '...$$t=1;...'] @@ -141,15 +162,14 @@ make-cmd = $(subst \#,\\\#,$(subst $$,$$$$,$(call escsq,$(cmd_$(1))))) # 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 +# 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 +# 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)); \ @@ -158,8 +178,8 @@ if_changed_dep = $(if $(strip $(any-prereq) $(arg-check) ), \ 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) +# 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)))