add pkg-config file

[asdil12]

Eg. Autobuild relies on that. Please add an option to create this file on building.

Example:

/usr/lib/pkgconfig/jsoncpp.pc

prefix=/usr
libdir=${prefix}/lib
includedir=${prefix}/include/jsoncpp

version = 0.5.0

name = jsoncpp
pkgname = jsoncpp

Name: ${name}
Version: ${version}
Description: Jsoncpp library version 0.5.0
Cflags: -I${includedir}
Libs: -L${libdir} -ljsoncpp

[cdunn2001]

I've used pkg-config myself, but I'm not sure where to put it or how to tell cmake to generate it. Could you submit a pull request?

[asdil12]

I actually don't know cmake enough as well.

[jplatte]

I could do this as I've already generated .pc files with CMake. However I can't access the corresponding files right now; I will submit a PR as soon as I can (will take some weeks).

[bchretien]

👍

The idea would be to have a template file (similar to this one) that would be filled with CMake variables (with CONFIGURE_FILE). Note that in our custom CMake toolbox, we handle pretty much everything when generating pkg-config files for all of our projects, so the CMake scripts can become quite complex. Still, you can make something much more simple here.