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Change subdir traversal to primarily cache information about what is available in subdirectories. 

- Rest of makefiles will move to using the information after it has been computed, instead of during subdir traversal.

Also, add 'make info-functions' target, which prints information on all the functions available in compiler-rt.

Also, add 'make help-devel' for listing help on targets intended for compiler-rt developers or direct users.

llvm-svn: 93715
This commit is contained in:
Daniel Dunbar 2010-01-18 06:48:40 +00:00
parent 56e0eb9fc9
commit 2d9816e44b
2 changed files with 42 additions and 5 deletions
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30
compiler-rt/Makefile
View File

@ -37,7 +37,12 @@ help:
@echo " all: build all configurations"
@echo
help-hidden: help
help-devel: help
@echo "Development targets:"
@echo " info-functions: list available compiler-rt functions"
@echo
help-hidden: help-devel
@echo "Debugging variables:"
@echo " DEBUGMAKE=1: enable some Makefile logging [default=]"
@echo " =2: enable more Makefile logging"
@ -46,6 +51,14 @@ help-hidden: help
@echo " make-print-FOO: print information on the variable 'FOO'"
@echo
info-functions:
@echo "compiler-rt Available Functions"
@echo
@echo "All Functions: $(AvailableFunctions)"
@$(foreach fn,$(AvailableFunctions),\
printf " %-20s - available in (%s)\n" $(fn)\
"$(foreach key,$(AvailableIn.$(fn)),$($(key).Dir))";)
# Provide default clean target which is extended by other templates.
.PHONY: clean
clean::
@ -230,3 +243,18 @@ ifneq ($(DEBUGMAKE),)
$(info MAKE: Done processing Makefile)
$(info )
endif
###
# Function Information
#
# FIXME: Factor out.
AvailableObjects := $(sort $(foreach key,$(SubDirKeys),\
$($(key).ObjNames)))
AvailableFunctions := $(AvailableObjects:%.o=%)
# Compute lists of where each function is available.
$(foreach key,$(SubDirKeys),\
$(foreach fn,$(subst .o,,$($(key).ObjNames)),\
$(call Append,AvailableIn.$(fn),$(key))))

17
compiler-rt/make/subdir.mk
View File

@ -54,6 +54,11 @@ ifneq ($(DEBUGMAKE),)
$$(info MAKE: $(Dir): Processing subdirectory)
endif
# Construct the variable key for this directory.
$(call Set,DirKey,SubDir.$(subst .,,$(subst /,__,$(1))))
$(call Append,SubDirKeys,$(DirKey))
$(call Set,$(DirKey).Dir,$(Dir))
# Reset subdirectory specific variables to sentinel value.
$$(foreach var,$$(RequiredSubdirVariables) $$(OptionalSubdirVariables),\
$$(call Set,$$(var),UNDEFINED))
@ -63,7 +68,7 @@ include $(1)/Makefile.mk
ifeq ($(DEBUGMAKE),2)
$$(foreach var,$(RequiredSubdirVariables) $(OptionalSubdirVariables),\
$$(if $$(call strneq UNDEFINED,$$($$(var))), \
$$(if $$(call strneq,UNDEFINED,$$($$(var))), \
$$(info MAKE: $(Dir): $$(var) is defined), \
$$(info MAKE: $(Dir): $$(var) is undefined)))
endif
@ -71,16 +76,20 @@ endif
# Check for undefined required variables, and unset sentinel value from optional
# variables.
$$(foreach var,$(RequiredSubdirVariables),\
$$(if $$(call strneq UNDEFINED,$$($$(var))), \
$$(if $$(call strneq,UNDEFINED,$$($$(var))),, \
$$(error $(Dir): variable '$$(var)' was not undefined)))
$$(foreach var,$(OptionalSubdirVariables),\
$$(if $$(call strneq UNDEFINED,$$($$(var))),, \
$$(if $$(call strneq,UNDEFINED,$$($$(var))),, \
$$(call Set,$$(var),)))
# Collect all subdirectory variables for subsequent use.
$$(foreach var,$(RequiredSubdirVariables) $(OptionalSubdirVariables),\
$$(call Set,$(DirKey).$$(var),$$($$(var))))
# Recurse.
include make/subdir.mk
# Restore directory variable.
# Restore directory variable, for cleanliness.
$$(call Set,Dir,$(1))
ifneq ($(DEBUGMAKE),)