This is a simple skeleton to build C/C++ projects without complex setup.This can be useful if you receive a project with a lot of code source and don't want to provide an IDE generated Makefile or use automake.It obviously doesn't support headers dependencies. Changing elements within a struct or a class require a clean & build.

Makefile

ifeq "$(PREFIX)" ""
	PREFIX=/usr
endif

ifeq "$(DESTDIR)" ""
	DESTDIR=/
endif



CC=$(CROSS_COMPILE)gcc
CXX=$(CROSS_COMPILE)g++
AR=$(CROSS_COMPILE)ar

ifeq "$(CONF)" ""
	CONF=Debug
endif

ifeq "$(CONF)" "Release"
    CFLAGS=-O2 -fPIC
    DEFINES=-DNDEBUG
endif

ifeq "$(CONF)" "Debug"
    CFLAGS=-O0 -g -fPIC
    DEFINES=-DDEBUG
endif

CXXFLAGS=$(CFLAGS)

BUILD=build/$(CROSS_COMPILE)$(CONF)
DIST=dist/$(CROSS_COMPILE)$(CONF)

NAME=mybin


INCLUDES=-Isrc -I$(DESTDIR)/usr/include

SRCS_CPP=$(shell find src -name "*.cpp")
SRCS_C=$(shell find src -name "*.c")

TARGET=$(DIST)/$(NAME)
LDFLAGS=-L$(DESTDIR)/usr/lib

# These are just examples
LDLIBSOPTIONS=\
-ldl \
-lz \
-ljson \
-lssl \
-lcrypto \
-lpthread

OBJ=\
$(addprefix $(BUILD)/,$(patsubst %.cpp,%.cpp_o,$(wildcard $(SRCS_CPP)))) \
$(addprefix $(BUILD)/,$(patsubst %.c,%.c_o,$(wildcard $(SRCS_C))))

MAKEFILE_INCLUDE=\
$(addprefix $(BUILD)/,$(patsubst %.cpp,%.cpp_o.d,$(wildcard $(SRCS_CPP)))) \
$(addprefix $(BUILD)/,$(patsubst %.c,%.c_o.d,$(wildcard $(SRCS_C))))

all: build
	
modules: $(MODULES)

build: $(TARGET)
	@[ ! -e dist/last ] || rm dist/last
	@ln -s $(CROSS)$(CONF) dist/last

$(TARGET): $(OBJ) $(DIST)
	# For a binary
	$(CXX) -o $(TARGET) $(CXXFLAGS) $(OBJ) $(LDLIBSOPTIONS)

	# For a shared library
	# $(CXX) -shared -o $(TARGET) $(CXXFLAGS) $(OBJ) $(LDLIBSOPTIONS)

-include $(MAKEFILE_INCLUDE)

$(BUILD)/%.cpp_o: %.cpp $(BUILD)
	$(CXX) -c -o $@ $(CXXFLAGS) $(WARNING) $(INCLUDES) $(DEFINES) $<
	$(CXX) -MM -o $@.d -MT $@ $(CXXFLAGS) $(WARNING) $(INCLUDES) $(DEFINES) $<

$(BUILD)/%.c_o: %.c $(BUILD)
	$(CC) -c -o $@ $(CFLAGS) $(WARNING) $(INCLUDES) $(DEFINES)  $<
	$(CC) -MM -o $@.d -MT $@ $(CFLAGS) $(WARNING) $(INCLUDES) $(DEFINES) $<

build: $(BUILD)

$(BUILD): Makefile
	# We create the same directories we have in "src" in "build" 
	find src -type d -exec mkdir -p $(BUILD)/{} \;
	touch $(BUILD)

$(DIST):
	mkdir -p $(DIST)

# Test this with: make install DESTDIR=./install PREFIX=/
install: build Makefile
	# Binaries
	[ -d $(DESTDIR)$(PREFIX)/bin ] || mkdir -p $(DESTDIR)$(PREFIX)/bin
	cp dist/last/$(NAME) $(DESTDIR)/bin/$(NAME)

clean:
	rm -Rf build dist