Question

Here is makefile:

CC=g++
CC_FLAGS=-Wall -march=native -ffast-math -O3
CC_SOURCES=AbsNode.cpp rle16.cpp
CC_OBJECTS=AbsNode.o rle16.o

# Link command:
test : $(CC_OBJECTS)
    $(CC) $(CC_OBJECTS) -o test

# Compilation commands: 
%.o:%.cpp
    $(CC) -c $(CC_FLAGS) $(input) -o $(output)

when applying make to this makefile, I get the following output:

g++ -c -Wall -march=native -ffast-math -O3  -o
g++: arguemnt to '-o' missing

Why are inputs and outputs ignored???

Answer 1

Your .cpp -> .o implicit rule is incorrect:

%.o: %.cpp
        $(CC) -c $(CC_FLAGS) $< -o $@

• $< is set by make to be the source file
• $@ will be the output file name