Makefile.in

# Copyright (C) 2018 Jerome Migne

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

CXX = g++

STD = -std=c++11

CPPFLAGS =

CXXFLAGS = $(STD) -Wall -Wpedantic -Wno-parentheses -Werror

BUILDDIR_ROOT = build

ifeq ($(strip $(DEBUG)),)
	DEBUG=0
endif
ifeq ($(DEBUG), 0)
	CPPFLAGS += -DNDEBUG
	CXXFLAGS += -O3
	BUILDDIR = $(BUILDDIR_ROOT)/release
else
	CXXFLAGS += -g3
	BUILDDIR = $(BUILDDIR_ROOT)/debug
endif

LDLIBS =

#---------------------------------------------------------

.PHONY: all clean_bin clean rebuild test

all: clean_bin $(BIN)

rebuild:
	@make clean && make

clean:
	rm -f $(BUILDDIR)/*

clean_bin:
	rm -f $(BIN)

$(BIN): $(BUILDDIR)/$(BIN)
	cp $(BUILDDIR)/$(BIN) $(BIN)

$(BUILDDIR)/$(BIN): $(addprefix $(BUILDDIR)/,$(SOURCES:.cpp=.o))
	$(CXX) -o $@ $^ $(LDLIBS)

$(BUILDDIR)/%.d: %.cpp
	@echo "Generating dependencies for" $<; \
	mkdir -p $(BUILDDIR); \
	set -e; rm -f $@; \
	$(CXX) -MM $(CPPFLAGS) $(STD) $< > $@.temp; \
	cp $@.temp $@.temp.1; \
	sed -i 's,\($*\)\.o[ :]*,$@ : ,g' $@.temp.1; \
	sed -i 's,\($*\)\.o[ :]*,$(BUILDDIR)/\1.o : ,g' $@.temp; \
	sed -i '$ a \\t$(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $(basename $@).o -c $<' $@.temp; \
	cat $@.temp $@.temp.1 > $@; \
	rm -f $@.temp*

ifeq (,$(filter $(MAKECMDGOALS), clean rebuild))
-include $(addprefix $(BUILDDIR)/,$(SOURCES:.cpp=.d))
endif