CODEWITHSUNDEEP
makefile
xna
xna

Reputation: 25

Makefile is working really weird

I wrote a very simple Makefile like this:

CXX = g++
CFLAG = -g -I../include
XNNLIB = ../src/cpuxnn.a
PROGS = testcpu

all: $(PROGS)

%: %.c $(XNNLIB)
(this is a tab here)$(CXX) $(CFLAG) -o $@ $^

and "make" starts g++ like this:

g++ testcpu.cpp -o testcpu

What happened to the CFLAG var???? and why the command is in such a mess order? I searched and researched but no answer. Please help!

Upvotes: 0

Views: 23

Answers (1)

Jonathan Wakely
Jonathan Wakely

Reputation: 171253

You've written a pattern rule for .c files, but make is finding a .cpp file, so it compiles it using the built-in rules for compiling C++.

You need to change your pattern rule to use %.cpp not %.c

It's conventional to use variables called CFLAGS (for C) and CXXFLAGS (for C++) not CFLAG

Upvotes: 3

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