I'm writing the most basic makefile I can think of, just compiling one main.cpp. I tried every suggestion I can find from reading similar questions but I still cannot pinpoint my issue. Common mistake is using spaces instead of tabs, I checked that too.
The whole project layout is as follows:
/bin /build /src |-----main.cpp /Makefile The main.cpp just prints "hello world".
Here's what the Makefile contains:
CXX = g++ WARNINGS = -Wall OBJ = -c OUTPUT = -o BIN = bin BUILD = build SOURCE = src executable:${BUILD}/main.o ${CXX} ${WARNINGS} ${OUTPUT} ${BIN}/program ${BUILD}/main.o #c++ -wall -o bin/program src/main.o main.o: ${SOURCE}/main.cpp ${CXX} ${WARNINGS} ${OBJ} ${OUTPUT} ${BUILD}/main.o ${SOURCE}/main.cpp As you can see, there are instructions to build main.o! If I don't use the makefile variables and plainly write the commands (the commented out line), it works.
There is no missing file. Here's proof that main.cpp exists 
