Utilize the INSTALL_PCDIR CMake option also for server pkgconfig file

[FaramosCZ]

First step in MDEV-14340

[FaramosCZ]

Submitted under MCA

[FaramosCZ]

There is a long term problem that the pkgconfig file is considered as arch-dependent in Fedora, Debian and RHEL.

I think the propper fix should look simmilar to what's in the "libmariadb/cmake".
This PR is a quick enhancement that preserves the default behaviour, while fixing our issue.

[iamlauriano]

where o i post bugs ?
thankfull

[claassistantio]

All committers have signed the CLA.

[ottok]

Thanks for your interest in MariaDB and contributing!

The commit message is quite brief. What are you trying to accomplish here? Just introduce a new variable INSTALL_PCDIR but not use it anywhere in the code base (just in your own builds)?

The fact that the file is installed in a wrong directory is a universal problem and correct handling of multi-arch files should be implemented. Adding a new build option just bloats the code in my opinion.

What do you think, should we maybe go with #597 instead?

[ottok]

I suggest this should be dismissed and #597 used to achieve the same thing instead.

[cvicentiu]

Hi @FaramosCZ !

A combination of PRs #597, and #910 were used to achieve (hopefully) the result you were looking for.

The commits for these are:

f21592c (10.1) - slightly unrelated, fixing something within the packageconf file.
c5c1027 (10.2) - Moving the packageconf file within the libdir folder. With appropriate defines during cmake, one can place the file where desired.
fd2dc9c (10.3) - Merging some of debian downstream packaging into MariaDB to better support multi-arch builds.

Thank you for spending time on this and I apologize for having this take so long to correct.

[cvicentiu]

And if you think that the solution that I proposed is not enough, let me know and I'd gladly consider extending it. Note that all these commits will reach 10.4 and newer versions.