norecurrence makfefile for multi-modules

发表于 更新于 分类于 阅读次数： Waline：

modules makefile(module.mk)

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   local_dir  := lib/codec
   local_lib  := $(local_dir)/libcodec.a
local_src  := $(addprefix $(local_dir)/,codec.c)
local_objs := $(subst .c,.o,$(local_src))

libraries  += $(local_lib)
sources    += $(local_src)

$(local_lib): $(local_objs)
        $(AR) $(ARFLAGS) $@ $^

top makefile

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# Collect information from each module in these four variables.
# Initialize them here as simple variables.
programs     :=
sources      :=
libraries    :=
extra_clean  :=

# objects and dependencies are recursive variable because at this
# point in the makefile the sources variable is empty, so they will
# be populated later when the include files are read
objects      = $(subst .c,.o,$(sources))
dependencies = $(subst .c,.d,$(sources))

# include_dirs is used to avoid duplicated the include dirs
include_dirs := lib include
CPPFLAGS     += $(addprefix -I ,$(include_dirs))
vpath %.h $(include_dirs)

# see makefile convention post for variable
MV  := mv -f
RM  := rm -f
SED := sed

# we should set all as the default goal, because in the include file
# there exist targets, but we also should include the module makefile
# first because programs variable is empty(the all target's prerequisites
# is varibale programs), so the following code solve the awkward.
all:

include lib/codec/module.mk
include lib/db/module.mk
include lib/ui/module.mk
include app/player/module.mk

.PHONY: all
all: $(programs)

.PHONY: libraries
libraries: $(libraries)

.PHONY: clean
clean:
        $(RM) $(objects) $(programs) $(libraries) \
              $(dependencies) $(extra_clean)

ifneq "$(MAKECMDGOALS)" "clean"
  include $(dependencies)
endif

%.c %.h: %.y
        $(YACC.y) --defines $<
        $(MV) y.tab.c $*.c
        $(MV) y.tab.h $*.h

# sed command use to add relative path to the dependency, because some tools
# like gcc are not include the relative path to the dependency output
%.d: %.c
        $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -M $< | \
        $(SED) 's,\($(notdir $*)\.o\) *:,$(dir $@)\1 $@: ,' > $@.tmp
        $(MV) $@.tmp $@

optimized top makefile for projects

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# $(call source-to-object, source-file-list)
source-to-object = $(subst .c,.o,$(filter %.c,$1)) \
                      $(subst .y,.o,$(filter %.y,$1)) \
                      $(subst .l,.o,$(filter %.l,$1))
# $(subdirectory)
subdirectory = $(patsubst %/module.mk,%,                      \
                  $(word                                         \
                    $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST)))

# $(call make-library, library-name, source-file-list)
define make-library
 	libraries += $1
 	sources   += $2
	$1: $(call source-to-object,$2)
       $(AR) $(ARFLAGS) $$@ $$^

endef

# $(call generated-source, source-file-list)
generated-source = $(subst .y,.c,$(filter %.y,$1))      \
                      $(subst .y,.h,$(filter %.y,$1))      \
                      $(subst .l,.c,$(filter %.l,$1))

# Collect information from each module in these four variables.
# Initialize them here as simple variables.
modules      := lib/codec lib/db lib/ui app/player
programs     :=
libraries    :=
sources      :=

objects      =  $(call source-to-object,$(sources))
dependencies =  $(subst .o,.d,$(objects))

include_dirs := lib include
CPPFLAGS     += $(addprefix -I ,$(include_dirs))
vpath %.h $(include_dirs)

MV  := mv -f
RM  := rm -f
SED := sed

all:

include $(addsuffix /module.mk,$(modules))

.PHONY: all
all: $(programs)

.PHONY: libraries
libraries: $(libraries)

.PHONY: clean
clean:
        $(RM) $(objects) $(programs) $(libraries) $(dependencies)       \
              $(call generated-source, $(sources))
ifneq "$(MAKECMDGOALS)" "clean"
  include $(dependencies)
endif

%.c %.h: %.y
        $(YACC.y) --defines $<
        $(MV) y.tab.c $*.c
        $(MV) y.tab.h $*.h
%.d: %.c
        $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -M $< | \
        $(SED) 's,\($(notdir $*)\.o\) *:,$(dir $@)\1 $@: ,' > $@.tmp
        $(MV) $@.tmp $@

optimized module.mk makefile(lib/codec) for module

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	# $(call make-library, library-name, source-file-list)
   define make-library
      libraries += $1
      sources   += $2
      $1: $(call source-to-object,$2)
          $(AR) $(ARFLAGS) $$@ $$^
endef

local_src := $(wildcard $(subdirectory)/*.c)
     $(eval $(call make-library, $(subdirectory)/libcodec.a, $(local_src)))
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