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Diffstat (limited to 'build-0.3/generator')
| -rw-r--r-- | build-0.3/generator | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/build-0.3/generator b/build-0.3/generator new file mode 100644 index 0000000..6ab29f2 --- /dev/null +++ b/build-0.3/generator @@ -0,0 +1,90 @@ +# file : build/generator +# copyright : Copyright (c) 2004-2012 Code Synthesis Tools CC +# license : GNU GPL v2; see accompanying LICENSE file + +# This makefile is an optional, transparent generator of "thunk" makefiles +# for the build setups with separate src and out directories. Without the +# generator, the make invocation for this setup has the following general +# form: +# +# make -C out_root/subdir -f src_root/subdir/makefile +# +# With the generator enabled, the same can be achieved with the following +# shorter command: +# +# make -C out_root/subdir +# +# Or, if the subdir directory may not yet exist, with this variant: +# +# make -C out_root dir=subdir +# +# To enable the generator, you will need to instruct make to pre-load it +# for every invocation by adding it to the MAKEFILES environment variable: +# +# export MAKEFILES=build-X.Y/generator +# +# The thunk makefiles for individual sub-directories are generated as +# needed and are automatically removed by the disfigure target. +# + +ifdef dir + +.PHONY: _all +_all: + @mkdir -p $(dir) + @$(MAKE) -C $(dir) dir= $(MAKECMDGOALS) + +ifneq ($(MAKECMDGOALS),) +.PHONY: $(MAKECMDGOALS) +$(MAKECMDGOALS): _all +else +.DEFAULT_GOAL := _all +endif + +else +ifeq ($(wildcard makefile Makefile GNUmakefile),) + +define literal_newline + + +endef + +makefile: empty := +makefile: space := $(empty) # +makefile: tab := $(empty) $(empty) +makefile: newline := $(literal_newline) + + +# Find the src_root directory. +# +# $1 - current directory +# +makefile: find = \ +$(if $1,$(if $(wildcard $1/build/bootstrap-dynamic.make),$1,$(call \ +find,$(patsubst %/,%,$(dir $1))))) + +# Convert /foo/bar to ../../. +# +# $1 - relative path from $(CURDIR) +# +makefile: path = $(subst $(space),,$(foreach d,$(subst /, ,$1/),../)) + +# $1 - relative path from $(CURDIR) +# +makefile: command_body = \ +@echo '\# Automatically generated by build.' >$@$(newline)\ +$(tab)@echo 'ifndef dir' >>$@$(newline)\ +$(tab)@echo 'override dir :=' >>$@$(newline)\ +$(tab)@echo 'include $(if $1,$(call path,$1))build/bootstrap-dynamic.make' >>$@$(newline)\ +$(tab)@echo 'include $$(src_root)$1/makefile' >>$@$(newline)\ +$(tab)@echo 'endif' >>$@ + +# $1 - output root directory or empty if none were found +# +makefile: command = $(if $1,$(call command_body,$(subst $1,,$(CURDIR)))) + +makefile: + $(call command,$(call find,$(CURDIR))) + +endif # makefile +endif # dir |