Installation of libraries.

[yikestone]

I want to how and where apt-get installs libraries. How can I install my own built programs in the same manner as apt-get does. For example: I built qt5.8 and installed it in /opt/qt5.8. So, how can I add it to library paths. So, that I can directly use all its libraries. Without specifying then separately. Like when installed through apt-get.

[stevepusser]

The LD_LIBRARY_PATH environment setting for that particular application that you want to use QT 5.8?

If you need to have them in apt-get, however, in Jessie, you'll first need to backport all the qt 5.5 packages, then use that to backport 5.6, then that to use that to build a newer version, and so on. It's quite a long process, but it's what NeputuneOS must be doing to get the new Qt 5 and KDE Plasma 5 version on a Debian Wheezy(!) base. I downloaded their ISO and ran it just to confirm that.

I think you may be able to build them in the openSUSE Build Service and chain each repo together, or give each package a different name, in order to speed up and simplify the process considerably. I found that the naming trick at least works for different major revisions of the backported Liquourix kernel, for example: https://build.opensuse.org/project/show ... r:codelite

[Princess Midna]

I think you can try to build a DEB package and install it through dpkg, although I personally don't know how to do that.

[phenest]

This is really 2 questions.

apt-get does not decide where libraries go. That is decided by package structure, therefore can differ from package to package. But generally they are placed in /usr/lib.

On my 64bit Stretch system, qt5 libraries are installed under /usr/lib/x86_64-linux-gnu.