Ilya fedin fix static build

[luis-pereira]

Fixes #208.
@Ilya87 Can't write to #212. So I created this PR with your commits and mine on top.
Tested with shared and static builds.

[ilya-fedin]

Thanks! Looks valid 🤔

[luis-pereira]

@ilya-fedin Did you put this to the test ?

[ilya-fedin]

Did you put this to the test ?

I tested with tdesktop's cmake rules a long time ago, but testing with lxqt-qtplugin's cmake rules wouldn't be an easy task with tdesktop 😥

[luis-pereira]

I tested with tdesktop's cmake rules a long time ago, but testing with lxqt-qtplugin's cmake rules wouldn't be an easy task with tdesktop disappointed_relieved

I'm confused. So what's the purpose ?

[ilya-fedin]

I'm confused. So what's the purpose ?

To get lxqt's icon theme & other appearance settings even on static binary

[luis-pereira]

To get lxqt's icon theme & other appearance settings even on static binary

Of course. I meant a PR that can't be tested.

[ilya-fedin]

I meant a PR that can't be tested.

I don't know. I tried to build libqtxdg with upstream cmake rules, but encountered into Requested 'glib-2.0 >= 2.50' but version of GLib is 2.40.2 when building lxqt-build-tools, static build of tdesktop works only on Ubuntu 14.04 due to hardcoded paths and hacks like glibc wraps 🙈

[luis-pereira]

libqtxdg requires 2.41.
Version 2.50 is a libfm-qt requirement.

I wasn't aware that lxqt-build-tools had Qt5 and GLIB requirements. I was actually asked for a review, but never did, some real life issues got in the way.

The purpose of such requirements are probably to fail as soon as possible. I don't agree with version check at lxqt-build-tools. The packages needed to build LXQt are much more than those two.

[ilya-fedin]

libqtxdg requires 2.41.

It is still greater than 2.40 (even though I need only xdgiconloader for lxqt-qtplugin) :(

CMake Error at /opt/cmake/share/cmake-3.17/Modules/FindPackageHandleStandardArgs.cmake:164 (message):
  Could NOT find GLIB: Found unsuitable version "2.40.2", but required is at
  least "2.41.0" (found
  /usr/include/glib-2.0;/usr/lib/x86_64-linux-gnu/glib-2.0/include)

[ilya-fedin]

I removed the check and confirm that this PR doesn't work with upstream cmake rules
28_LibQtXdg..txt