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authorLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 08:48:48 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 08:48:48 -0800
commit2e1ca21d46aaef95101723fa402f39d3a95aba59 (patch)
treecd95efefb9ccb6ab4ac0589d01c06cdfc22cc989 /scripts/Kbuild.include
parent315ab19a6d12d6af7b6957090822f3057ab7e80f (diff)
parenteae0f536f640bb95f2ad437a57c40c7d5683d1ac (diff)
Merge master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuild
* master.kernel.org:/pub/scm/linux/kernel/git/sam/kbuild: (46 commits) kbuild: remove obsoleted scripts/reference_* files kbuild: fix make help & make *pkg kconfig: fix time ordering of writes to .kconfig.d and include/linux/autoconf.h Kconfig: remove the CONFIG_CC_ALIGN_* options kbuild: add -fverbose-asm to i386 Makefile kbuild: clean-up genksyms kbuild: Lindent genksyms.c kbuild: fix genksyms build error kbuild: in makefile.txt note that Makefile is preferred name for kbuild files kbuild: replace PHONY with FORCE kbuild: Fix bug in crc symbol generating of kernel and modules kbuild: change kbuild to not rely on incorrect GNU make behavior kbuild: when warning symbols exported twice now tell user this is the problem kbuild: fix make dir/file.xx when asm symlink is missing kbuild: in the section mismatch check try harder to find symbols kbuild: fix section mismatch check for unwind on IA64 kbuild: kill false positives from section mismatch warnings for powerpc kbuild: kill trailing whitespace in modpost & friends kbuild: small update of allnoconfig description kbuild: make namespace.pl CROSS_COMPILE happy ... Trivial conflict in arch/ppc/boot/Makefile manually fixed up
Diffstat (limited to 'scripts/Kbuild.include')
-rw-r--r--scripts/Kbuild.include65
1 files changed, 52 insertions, 13 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 0168d6c3707..59620b1554e 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -44,6 +44,43 @@ define filechk
fi
endef
+######
+# gcc support functions
+# See documentation in Documentation/kbuild/makefiles.txt
+
+# as-option
+# 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 ;)
+
+# cc-option
+# 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-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;)
+
+# 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-version
+# Usage gcc-ver := $(call cc-version, $(CC))
+cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
+ $(if $(1), $(1), $(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;)
+
###
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
# Usage:
@@ -51,8 +88,7 @@ endef
build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj
# If quiet is set, only print short version of command
-cmd = @$(if $($(quiet)cmd_$(1)),\
- echo ' $(call escsq,$($(quiet)cmd_$(1)))' &&) $(cmd_$(1))
+cmd = @$(echo-cmd) $(cmd_$(1))
# Add $(obj)/ for paths that is not absolute
objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
@@ -75,30 +111,33 @@ endif
echo-cmd = $(if $($(quiet)cmd_$(1)), \
echo ' $(call escsq,$($(quiet)cmd_$(1)))';)
+make-cmd = $(subst \#,\\\#,$(subst $$,$$$$,$(call escsq,$(cmd_$(1)))))
+
# function to only execute the passed command if necessary
# >'< substitution is for echo to work, >$< substitution to preserve $ when reloading .cmd file
# note: when using inline perl scripts [perl -e '...$$t=1;...'] in $(cmd_xxx) double $$ your perl vars
-#
-if_changed = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
+#
+if_changed = $(if $(strip $(filter-out $(PHONY),$?) \
+ $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
@set -e; \
- $(echo-cmd) \
- $(cmd_$(1)); \
- echo 'cmd_$@ := $(subst $$,$$$$,$(call escsq,$(cmd_$(1))))' > $(@D)/.$(@F).cmd)
+ $(echo-cmd) $(cmd_$(1)); \
+ echo 'cmd_$@ := $(make-cmd)' > $(@D)/.$(@F).cmd)
# execute the command and also postprocess generated .d dependencies
# file
-if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
- $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
+if_changed_dep = $(if $(strip $(filter-out $(PHONY),$?) \
+ $(filter-out FORCE $(wildcard $^),$^) \
+ $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
@set -e; \
- $(echo-cmd) \
- $(cmd_$(1)); \
- scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(call escsq,$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
+ $(echo-cmd) $(cmd_$(1)); \
+ scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(@D)/.$(@F).tmp; \
rm -f $(depfile); \
mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).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)
-if_changed_rule = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ),\
+if_changed_rule = $(if $(strip $(filter-out $(PHONY),$?) \
+ $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ),\
@set -e; \
$(rule_$(1)))