CMAKE auto header file dependency

Question

Question is similar to this question

Handling header files dependencies with cmake

I have sample program dir having main.c main.h and CMakeLists.txt

main.h contents are

#ifndef MAIN_H
#define MAIN_H
int t=3;
int y=2;
#endif

main.c contents are

#include <main.h>
#include<stdio.h>
int main(){

  printf("%d apple",t);
}

and CMakeLists.txt

PROJECT( test )
AUX_SOURCE_DIRECTORY(. test_SRCS)
include_directories(.)
ADD_EXECUTABLE (main ${test_SRCS})

but cmake is not rebuilding main.c on modification of header file. I want it to auto-generate header file dependency. Is it possible using cmake ?

if not is there any other tool which can do that ?

The dependency management is working fine for me for this example (using GCC and CMake 2.8.0 on Linux). — antonakos
– antonakos, Commented Oct 27, 2011 at 19:28
@antonakos is it recompiling the project on modification of main.h header file ? — Vivek Goel
– Vivek Goel, Commented Oct 28, 2011 at 4:34
@antonakos specifying minimum version as 2.8 it worked can you please put your comment as answer ? — Vivek Goel
– Vivek Goel, Commented Oct 28, 2011 at 7:52

antonakos · Accepted Answer · 2011-10-28 10:26:43Z

4

As mentioned in my comment, I have tried out your example and things were working fine: if main.h was modified then main.c would be recompiled.

My installation of CMake (version 2.8.0) told me to add

cmake_minimum_required(VERSION 2.8)

to the CMakeLists.txt file, but that is all of the adjustments I needed.

answered Oct 28, 2011 at 10:26

antonakos

8,3812 gold badges34 silver badges34 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Edward Strange · Accepted Answer · 2012-12-30 02:27:28Z

1

Answering this for others that google search...

I ran into this problem with one of my projects. As it turns out I added the header to the cpp file after running cmake. Re-running cmake fixed the problem. If you run into this, try that and see if it fixes the issue.

answered Dec 30, 2012 at 2:27

Edward Strange

41k9 gold badges80 silver badges128 bronze badges

Comments

Mark · Accepted Answer · 2011-10-27 21:03:31Z

-1

From the cmake 2.8.0 documentation of AUX_SOURCE_DIRECTORY:

It is tempting to use this command to avoid writing the list of source files for a library or executable target. While this seems to work, there is no way for CMake to generate a build system that knows when a new source file has been added. Normally the generated build system knows when it needs to rerun CMake because the CMakeLists.txt file is modified to add a new source. When the source is just added to the directory without modifying this file, one would have to manually rerun CMake to generate a build system incorporating the new file.

Why do you want to avoid creating a list of files? Such lists generally do not change frequently.

answered Oct 27, 2011 at 21:03

Mark

1,0632 gold badges11 silver badges24 bronze badges

2 Comments

Vivek Goel Over a year ago

sorry to say but your answer is out of scope. What my question was cmake is not rebuilding the project on change of header files.

Mark Over a year ago

@VivekGoel - Crap, you're right. I misinterpreted it as applying to file modifications as well. Thanks for pointing out my mistake.

Collectives™ on Stack Overflow

CMAKE auto header file dependency

3 Answers 3

Comments

Comments

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related