Dave Hylands
11 years ago
9 changed files with 195 additions and 201 deletions
@ -0,0 +1,52 @@ |
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ifneq ($(lastword a b),b) |
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$(error These Makefiles require make 3.81 or newer) |
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endif |
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# Set TOP to be the path to get from the current directory (where make was
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# invoked) to the top of the tree. $(lastword $(MAKEFILE_LIST)) returns
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# the name of this makefile relative to where make was invoked.
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#
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# We assume that this file is in the py directory so we use $(dir ) twice
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# to get to the top of the tree.
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THIS_MAKEFILE := $(lastword $(MAKEFILE_LIST)) |
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TOP := $(patsubst %/py/mkenv.mk,%,$(THIS_MAKEFILE)) |
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# Turn on increased build verbosity by defining BUILD_VERBOSE in your main
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# Makefile or in your environment. You can also use V=1 on the make command
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# line.
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ifeq ("$(origin V)", "command line") |
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BUILD_VERBOSE=$(V) |
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endif |
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ifndef BUILD_VERBOSE |
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BUILD_VERBOSE = 0 |
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endif |
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ifeq ($(BUILD_VERBOSE),0) |
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Q = @ |
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else |
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Q = |
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endif |
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# Since this is a new feature, advertise it
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ifeq ($(BUILD_VERBOSE),0) |
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$(info Use make V=1 or set BUILD_VERBOSE in your environment to increase build verbosity.) |
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endif |
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# default settings; can be overriden in main Makefile
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PY_SRC ?= $(TOP)/py |
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BUILD ?= build |
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RM = rm |
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ECHO = @echo |
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AS = $(CROSS_COMPILE)as |
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CC = $(CROSS_COMPILE)gcc |
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LD = $(CROSS_COMPILE)ld |
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OBJCOPY = $(CROSS_COMPILE)objcopy |
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SIZE = $(CROSS_COMPILE)size |
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all: |
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.PHONY: all |
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MKENV_INCLUDED = 1 |
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@ -0,0 +1,92 @@ |
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ifneq ($(MKENV_INCLUDED),1) |
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# We assume that mkenv is in the same directory as this file.
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THIS_MAKEFILE = $(lastword $(MAKEFILE_LIST)) |
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include $(dir $(THIS_MAKEFILE))mkenv.mk |
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endif |
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# This file expects that OBJ contains a list of all of the object files.
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# The directory portion of each object file is used to locate the source
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# and should not contain any ..'s but rather be relative to the top of the
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# tree.
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#
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# So for example, py/map.c would have an object file name py/map.o
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# The object files will go into the build directory and mantain the same
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# directory structure as the source tree. So the final dependency will look
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# like this:
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#
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# build/py/map.o: py/map.c
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#
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# We set vpath to point to the top of the tree so that the source files
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# can be located. By following this scheme, it allows a single build rule
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# to be used to compile all .c files.
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vpath %.S . $(TOP) |
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$(BUILD)/%.o: %.S |
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$(ECHO) "CC $<" |
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$(Q)$(CC) $(CFLAGS) -c -o $@ $< |
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vpath %.s . $(TOP) |
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$(BUILD)/%.o: %.s |
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$(ECHO) "AS $<" |
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$(Q)$(AS) -o $@ $< |
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define compile_c |
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$(ECHO) "CC $<" |
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$(Q)$(CC) $(CFLAGS) -c -MD -o $@ $< |
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@# The following fixes the dependency file.
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@# See http://make.paulandlesley.org/autodep.html for details. |
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@cp $(@:.o=.d) $(@:.o=.P); \ |
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sed -e 's/#.*//' -e 's/^[^:]*: *//' -e 's/ *\\$$//' \
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-e '/^$$/ d' -e 's/$$/ :/' < $(@:.o=.d) >> $(@:.o=.P); \
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rm -f $(@:.o=.d) |
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endef |
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vpath %.c . $(TOP) |
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$(BUILD)/%.o: %.c |
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$(call compile_c) |
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# The following rule uses | to create an order only prereuisite. Order only
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# prerequisites only get built if they don't exist. They don't cause timestamp
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# checkng to be performed.
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#
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# $(sort $(var)) removes duplicates
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#
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# The net effect of this, is it causes the objects to depend on the
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# object directories (but only for existance), and the object directories
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# will be created if they don't exist.
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OBJ_DIRS = $(sort $(dir $(OBJ))) |
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$(OBJ): | $(OBJ_DIRS) |
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$(OBJ_DIRS): |
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mkdir -p $@ |
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ifneq ($(PROG),) |
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# Build a standalone executable (unix and unix-cpy do this)
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all: $(PROG) |
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$(PROG): $(OBJ) |
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$(ECHO) "LINK $<" |
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$(Q)$(CC) -o $@ $(OBJ) $(LIB) $(LDFLAGS) |
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ifndef DEBUG |
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$(Q)strip $(PROG) |
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endif |
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$(Q)size $(PROG) |
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clean: clean-prog |
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clean-prog: |
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$(RM) -f $(PROG) |
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.PHONY: clean-prog |
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endif |
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clean: |
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$(RM) -rf $(BUILD) |
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.PHONY: clean |
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print-cfg: |
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$(ECHO) "PY_SRC = $(PY_SRC)" |
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$(ECHO) "BUILD = $(BUILD)" |
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$(ECHO) "OBJ = $(OBJ)" |
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.PHONY: print-cfg |
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-include $(OBJ:.o=.P) |
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