Tag Archives: C++

pkg-config and CMake

The environmental variable:
PKG_CONFIG_PATH is the place that you should place all of your “.pc” files.

Example:
Type in the shell:

Then you can type:

Now how to print environmental variable in CMake file:

How to set environmental variable in CMake file:

After setting environmental variable PKG_CONFIG_PATH pointing to your .pc file you can call

 

How to find CMake from arbitrary installed locations

In my other tutorial, I showed you how to install your code in an arbitrary location in Unix/ Linux systems. In this tutorial, I’m gonna show you how to find them after installation. Here I have two examples: OpenCV, PCL point cloud

I can assume that you have compiled and installed them using the following command:

1)PCL point cloud

put this line in your CMake file:

and check if everything is correct:

2)OpenCV

put this line in your CMake file:

and check if everything is correct:

if you don’t want to make changes to your CMakeList.txt file you can send <>__DIR as CMake parameter. Example:

 

Installing programs into arbitrary location in Unix/ Linux systems

After you compiled and built your code, you should install it by calling sudo install to put headers and shared libraries into /usr/include/ and /usr/lib/ and configuration files into /usr/local and /usr/share

usually, I don’t like to touch my system binaries and I prefer to install my compiled code into my home directory so I can safely delete them anytime. If you using CMake use the following parameters to install everything in “/home/<user_name>/usr” instead of “/usr

if you are just using make, use the following: