[PATCH 1/5] scripts/Kbuild.include: update to latest kernel version
Sascha Hauer
s.hauer at pengutronix.de
Mon Jan 2 08:57:10 EST 2012
To get cc-disable-warning
Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
scripts/Kbuild.include | 143 ++++++++++++++++++++++++++++++++++--------------
1 files changed, 102 insertions(+), 41 deletions(-)
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 95e7746..912cfd8 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -1,7 +1,7 @@
####
# kbuild: Generic definitions
-# Convinient variables
+# Convenient variables
comma := ,
squote := '
empty :=
@@ -21,10 +21,21 @@ depfile = $(subst $(comma),_,$(dot-target).d)
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
@@ -41,13 +52,13 @@ escsq = $(subst $(squote),'\$(squote)',$1)
# to specify a valid file as first prerequisite (often the kbuild file)
define filechk
$(Q)set -e; \
- echo ' CHK $@'; \
+ $(kecho) ' CHK $@'; \
mkdir -p $(dir $@); \
$(filechk_$(1)) < $< > $@.tmp; \
if [ -r $@ ] && cmp -s $@ $@.tmp; then \
rm -f $@.tmp; \
else \
- echo ' UPD $@'; \
+ $(kecho) ' UPD $@'; \
mv -f $@.tmp $@; \
fi
endef
@@ -56,56 +67,95 @@ 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" "$$TMPO")
+
# as-option
-# Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,)
+# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
-as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
- -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
- else echo "$(2)"; fi ;)
+as-option = $(call try-run,\
+ $(CC) $(CFLAGS) $(1) -c -xassembler /dev/null -o "$$TMP",$(1),$(2))
# as-instr
-# Usage: cflags-y += $(call as-instr, instr, option1, option2)
+# Usage: cflags-y += $(call as-instr,instr,option1,option2)
-as-instr = $(shell if echo -e "$(1)" | \
- $(CC) $(AFLAGS) -c -xassembler - \
- -o $(TMPOUT)astest$$$$.out > /dev/null 2>&1; \
- then rm $(TMPOUT)astest$$$$.out; echo "$(2)"; \
- else echo "$(3)"; fi)
+as-instr = $(call try-run,\
+ /bin/echo -e "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -xassembler -o "$$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) $(KBUILD_CPPFLAGS) $(CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",$(1),$(2))
# cc-option-yn
-# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
-cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
- > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
+# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
+cc-option-yn = $(call try-run,\
+ $(CC) $(KBUILD_CPPFLAGS) $(CFLAGS) $(1) -c -xc /dev/null -o "$$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) $(CFLAGS) -W$(strip $(1)) -c -xc /dev/null -o "$$TMP",-Wno-$(strip $(1)))
+
# cc-version
-# Usage gcc-ver := $(call cc-version, $(CC))
+# Usage gcc-ver := $(call cc-version)
cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC))
+# cc-fullversion
+# Usage gcc-ver := $(call cc-fullversion)
+cc-fullversion = $(shell $(CONFIG_SHELL) \
+ $(srctree)/scripts/gcc-version.sh -p $(CC))
+
# cc-ifversion
# Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
-cc-ifversion = $(shell if [ $(call cc-version, $(CC)) $(1) $(2) ]; then \
- echo $(3); fi;)
+cc-ifversion = $(shell [ $(call cc-version, $(CC)) $(1) $(2) ] && echo $(3))
+
+# cc-ldoption
+# Usage: ldflags += $(call cc-ldoption, -Wl$(comma)--hash-style=both)
+cc-ldoption = $(call try-run,\
+ $(CC) $(1) -nostdlib -xc /dev/null -o "$$TMP",$(1),$(2))
# ld-option
-# Usage: ldflags += $(call ld-option, -Wl$(comma)--hash-style=both)
-ld-option = $(shell if $(CC) $(1) -nostdlib -xc /dev/null \
- -o $(TMPOUT)ldtest$$$$.out > /dev/null 2>&1; \
- then rm $(TMPOUT)ldtest$$$$.out; echo "$(1)"; \
- else echo "$(2)"; fi)
+# Usage: LDFLAGS += $(call ld-option, -X)
+ld-option = $(call try-run,\
+ $(CC) /dev/null -c -o "$$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=
@@ -113,15 +163,29 @@ ld-option = $(shell if $(CC) $(1) -nostdlib -xc /dev/null \
# $(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
-addtree = $(if $(filter-out -I/%,$(1)),$(patsubst -I%,-I$(srctree)/%,$(1))) $(1)
+###
+# 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)))
-# 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)))
###
@@ -133,16 +197,14 @@ 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))) )
+else
+arg-check = $(if $(strip $(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;...']
@@ -153,15 +215,14 @@ 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)); \
@@ -170,8 +231,8 @@ 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)))
--
1.7.7.3
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