如何在Mac上添加到pkg-config搜索路径？

Question

I'm trying to add a directory to the pkg-config search paths, but I cannot figure out how to do it on mac. According to all the discussion I can find online, it looks like it should be according to the environment variable PKG_CONFIG_PATH , that variable doesn't seem to exist.

For example:

$ echo $PKG_CONFIG_PATH

gives a blank response.

Also, I have tried doing this:

$ export PKG_CONFIG_PATH=/my/path:$PKG_CONFIG_PATH

And it does not change the results of $ pkg-config --variable pc_path pkg-config .

How are the pkg-config search paths handled on macOS?

Answer 1

It turns out PKG_CONFIG_PATH is the correct path. It just does not echo to the console for some reason.