makefile debug release
in [Unix Programming]
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From: Olivier Scalbert on 9 Dec 2009 07:31 Hello, I am doing a small project and I have some difficulties to create the makefile. I want to be able to create a debug and a release version, so I have different directories for the generated object files. The following makefile seems to work but I am sure it can be simplified a lot. I have done some experiments but without any success ... If you can help me, I would appreciate ! Olivier SRC_DIR = src DEBUG_OBJ_DIR = objdbg DEBUG_FLAGS = -g -Wall -pedantic RELEASE_OBJ_DIR = obj RELEASE_FLAGS = -O3 -Wall -pedantic all: debug release debug: prog-dbg release: prog $(DEBUG_OBJ_DIR)/main.o: $(SRC_DIR)/main.cc g++ -c $(DEBUG_FLAGS) $< -o $@ $(DEBUG_OBJ_DIR)/engine.o: $(SRC_DIR)/engine.cc g++ -c $(DEBUG_FLAGS) $< -o $@ prog-dbg: $(DEBUG_OBJ_DIR)/engine.o $(DEBUG_OBJ_DIR)/main.o g++ $^ -o $@ $(RELEASE_OBJ_DIR)/main.o: $(SRC_DIR)/main.cc g++ -c $(RELEASE_FLAGS) $< -o $@ $(RELEASE_OBJ_DIR)/engine.o: $(SRC_DIR)/engine.cc g++ -c $(RELEASE_FLAGS) $< -o $@ prog: $(RELEASE_OBJ_DIR)/engine.o $(RELEASE_OBJ_DIR)/main.o g++ $^ -o $@ clean: rm -f $(RELEASE_OBJ_DIR)/* rm -f $(DEBUG_OBJ_DIR)/* rm -f prog-dbg prog
From: Rainer Weikusat on 10 Dec 2009 12:03 Olivier Scalbert <olivier.scalbert(a)algosyn.com> writes: > I am doing a small project and I have some difficulties to create the > makefile. > I want to be able to create a debug and a release version, so I have > different directories for the generated object files. I usually do this by passing a command-line parameter to make when I want a non-debug build ('releases' are much less frequent than 'internal builds') and use a different set of compiler flags (via GNU make conditionals and a variable) if this parameter was given. Additionally, I use a variable to hold the extension for object code files and 'debug build files' end with .o while 'release build files' use .o2 instead (which gets around the need to use different directories).
From: Olivier Scalbert on 14 Dec 2009 04:43 Rainer Weikusat wrote: > I usually do this by passing a command-line parameter to make when I > want a non-debug build ('releases' are much less frequent than > 'internal builds') and use a different set of compiler flags (via GNU > make conditionals and a variable) if this parameter was > given. Additionally, I use a variable to hold the extension for object > code files and 'debug build files' end with .o while 'release build > files' use .o2 instead (which gets around the need to use different > directories). Thanks for the help ! By the way, do you know a news group specialized in make and Makefiles ? I try to google but I found nothing ... Olivier
From: Maxim Yegorushkin on 15 Dec 2009 16:55 On 14/12/09 09:43, Olivier Scalbert wrote: [] > By the way, do you know a news group specialized in make and Makefiles ? > I try to google but I found nothing ... gmane.comp.gnu.make.general it is. -- Max
From: Maxim Yegorushkin on 15 Dec 2009 17:24
On 09/12/09 12:31, Olivier Scalbert wrote: > Hello, > > I am doing a small project and I have some difficulties to create the > makefile. > I want to be able to create a debug and a release version, so I have > different directories for the generated object files. > > The following makefile seems to work but I am sure it can be simplified > a lot. I have done some experiments but without any success ... > If you can help me, I would appreciate ! > > Olivier > > > > SRC_DIR = src > > DEBUG_OBJ_DIR = objdbg > DEBUG_FLAGS = -g -Wall -pedantic > > RELEASE_OBJ_DIR = obj > RELEASE_FLAGS = -O3 -Wall -pedantic > > all: debug release > > debug: prog-dbg > > release: prog > > $(DEBUG_OBJ_DIR)/main.o: $(SRC_DIR)/main.cc > g++ -c $(DEBUG_FLAGS) $< -o $@ > > $(DEBUG_OBJ_DIR)/engine.o: $(SRC_DIR)/engine.cc > g++ -c $(DEBUG_FLAGS) $< -o $@ > > prog-dbg: $(DEBUG_OBJ_DIR)/engine.o $(DEBUG_OBJ_DIR)/main.o > g++ $^ -o $@ > > $(RELEASE_OBJ_DIR)/main.o: $(SRC_DIR)/main.cc > g++ -c $(RELEASE_FLAGS) $< -o $@ > > $(RELEASE_OBJ_DIR)/engine.o: $(SRC_DIR)/engine.cc > g++ -c $(RELEASE_FLAGS) $< -o $@ > > prog: $(RELEASE_OBJ_DIR)/engine.o $(RELEASE_OBJ_DIR)/main.o > g++ $^ -o $@ > > clean: > rm -f $(RELEASE_OBJ_DIR)/* > rm -f $(DEBUG_OBJ_DIR)/* > rm -f prog-dbg prog You can simplify this in many interesting ways using GNU Make. (I see no reason to use any other make). Something along these lines: # override with `make BUILD=release` # default to debug build BUILD := debug SRC_DIR = :src # using make's computed variables to select object and bin folders # depending on the build type OBJ_DIR.debug := objdbg OBJ_DIR.release : objrel OBJ_DIR := $(OBJ_DIR.$(BUILD)) BIN_DIR.debug := bindbg BIN_DIR.release := binrel BIN_DIR := $(BIN_DIR.$(BUILD)) # same for flags FLAGS.debug = -g -Wall -pedantic FLAGS.release = -g -O3 -Wall -pedantic # can have debuginfo with -O FLAGS := $(FLAGS.$(BUILD)) all: $(BIN_DIR)/prog # how to build any .o from the corresponding.cc # the | order-only dependency is to create OBJ_DIR on demand $(OBJ_DIR)/%.o: $(SRC_DIR)/%.cc | $(OBJ_DIR) g++ -c $(FLAGS) $< -o $@ # the | order-only dependency is to create BIN_DIR on demand $(BIN_DIR)/prog: $(OBJ_DIR)/engine.o $(OBJ_DIR)/main.o | $(BIN_DIR) g++ $^ -o $@ # how to create folders on demand $(OBJ_DIR) $(BIN_DIR): mkdir $@ clean : rm -rf $(OBJ_DIR) $(BIN_DIR) ..PHONY: clean This makefile builds or cleans only one type of the build depending on the invocation. To clean and build a debug build invoke make as: make clean make To clean and build a release build invoke as: make BUILD=release clean make BUILD=release -- Max |