Makefile for small C++ projects

Makefile

# Add name of the program as target
TARGET = out
CXX = g++
# Add libs
LIBS = -lm
CPPFLAGS = -std=c++17 -pedantic -Wall -Wno-deprecated-declarations -Os
OBJS = $(patsubst %.cpp, %.o, $(wildcard *.cpp))
INCS = $(wildcard *.h)

all : options ${TARGET}

debug: CPPFLAGS += -g -DDEBUG
debug: options ${TARGET}

%.o: %.c $(INCS)
        $(CXX) $(CPPFLAGS) -c $< -o $@

.PRECIOUS: $(TARGET) $(OBJS)

$(TARGET) : $(OBJS)
        $(CXX) $(OBJS) -Wall $(LIBS) -o $@

options:
        @echo "----- Build options -----"
        @echo "CPPFLAGS = ${CPPFLAGS}"
        @echo "CXX      = ${CXX}"
        @echo "INCS     = ${INCS}"
        @echo "LIBS     = ${LIBS}"
        @echo "OBJS     = ${OBJS}"
        @echo "-------------------------"

clean:
        -rm -f *.o
        -rm -f $(TARGET)

.PHONY: all clean