为什么我在 makefile 中指定的编译器标志没有出现在我的终端（Cygwin）output 中？

Question

So I'm trying to run C code with a Cygwin terminal and I have a makefile called Makefile.mak with the following in it:

CFLAGS=-Wall -g

clean:
    rm -f ex3
    

The book I have "Learn C the Hard Way" says I need to use the command "make clean", however, when I write this I get the error

make: *** No rule to make target 'clean'.  Stop.

It only works if I type

make -f Makefile.mak clean."

The next problem is that when I try the make command on my C file (ex3.c) I get the output

cc     ex3.c   -o ex3

yet I am supposed to see the flags in that output from my makefile as well. Like this:

cc -Wall -g   ex3.c   -o ex3.

I've tried changing the settings in my gcc compiler and still nothing.

I also have the makefile and my C code file in the same file path.

Any help would be greatly appreciated.

Answer 1

The filename Makefile.mak is not picked up by make by default. You need to name it either "makefile" or "Makefile" for that.

As for the compile command, you didn't specify a target on how to build ex3. You need to add that:

ex3: ex3.c
    cc $(CFLAGS) -o $@ $^