Added packaging using CPack and pkg-config.

[KOLANICH]

Fixed installation dir of configs - it must be arch-independent for a header-only library.

[adishavit]

Thank you for your contribution!!

I have no idea what you did - I am not familiar with CPack.
Can you explain more?
Will it affect any other builds?
For other platforms - e.g. on Windows?

[KOLANICH]

It will affect all builds. I.e. one can generate installers for Windows (using NSIS, WiX and Qt installer Framework) since now (but I don't recommend it, for such libs just a zip archive is better, of course it can also be generated).

If you use MSYS2, its pkg-config should work too, when the resulting archive is unpacked properly.

Currently CPack doesn't support pacman (a package manager used in Arch Linux distro, but it is cross-platform, so MSYS2 uses it too), which is used in MSYS2, so no package installable with it can be generated out of the box.

[adishavit]

Is this ready to merge?
BTW, is there a way to add CI for this?

[adishavit]

Pinging @a4z @BillyONeal @memsharded @sehe (et al).
You've all made PRs to argh and I would appreciate your review/inputs about this as you are more versed than I in package management.

[memsharded]

I am not an expert in CPack, but I'd say it is looking good. A different discussion is if the packaging specific code should belong to the library source repo or to the package system, but this would be a difficult one, and I don't think this is a discussion that belongs here.

[memsharded]

This change might require changes in other package managers, that will need to adapt to the new install layout. As long as changes come in a new version, it is doable, but extra effort to implement by other package managers, which logic might become dirtier:

if argh-version < x.y.z:
     files installed in cmake/argh
else
     files installed in arch/cmake/argh

[KOLANICH]

This change might require changes in other package managers, that will need to adapt to the new install layout.

IDK if really. Debian/Ubuntu, Fedora and Arch already support this layout, so it is not "new". IDK about other distros.

[a4z]

SInce my 2 cents where requested, here they are:

I have no idea about using cmake as packaging tool, since I do not know any serious project where such packages are used.
The way to package something is usual: make install DESTDIR=where/ever and put where/ever into the package.
Why now a new subdirectory should be needed for arch for something that is a header only library is not obvious to me and outside of my understanding, so please do not expect any valuable feedback from me to to a topic that I feel is rather not in my domain

[KOLANICH]

BTW, is there a way to add CI for this?

Surely there is, but it would require quite a lot of work to do it properly.

[adishavit]

What's new?

[KOLANICH]

Nothing new, just rebased.