Refactor CMakeLists - separation of libraries

[pawel-soja]

Split the libraries into separate folders and create CMakeLists for each of them.

[pawel-soja]

@knro Do we care about UNITY_BUILD? I see that it has not been tested for a long time and bugs fly. I am also not convinced that UNITY_BUILD is needed with the current capabilities of compilers and multi-threading of compilation.

[pawel-soja]

@knro Do we care about UNITY_BUILD? I see that it has not been tested for a long time and bugs fly. I am also not convinced that UNITY_BUILD is needed with the current capabilities of compilers and multi-threading of compilation.

@knro I repeat the question, can I remove all UNITY_BUILD?

indi/CMakeLists.txt

Line 448 in f0228fa

IF (UNITY_BUILD)

[knro]

Sorry, sure go ahead.

[pawel-soja]

There are 2 options for building:

OPTION(INDI_BUILD_SHARED "Build shared library" ON)
OPTION(INDI_BUILD_STATIC "Build static library" ON)

By default, they are enabled and the following libraries are created:

libindiAlignmentClient.a
libindiAlignmentDriver.so -> libindiAlignmentDriver.so.1
libindiAlignmentDriver.so.1 -> libindiAlignmentDriver.so.1.9.9
libindiAlignmentDriver.so.1.9.9

libindiclientqt.a
libindiclientqt.so -> libindiclientqt.so.1
libindiclientqt.so.1 -> libindiclientqt.so.1.9.9
libindiclientqt.so.1.9.9

libindiclient.a
libindiclient.so -> libindiclient.so.1
libindiclient.so.1 -> libindiclient.so.1.9.9
libindiclient.so.1.9.9

libindidriver.a
libindidriver.so -> libindidriver.so.1
libindidriver.so.1 -> libindidriver.so.1.9.9
libindidriver.so.1.9.9

libindilx200.so -> libindilx200.so.1
libindilx200.so.1 -> libindilx200.so.1.9.9
libindilx200.so.1.9.9

Shared libraries have been added.
The static libraries have been left with the same name as before.

For the library libindilx200 I did not add a static library so as not to obscure the name. Because static libraries can take precedence when linking.

I suggest for the future to make static libraries have static in the name for easier selection when linking.
In the Indi version 2.0.0 I will make such libraries appear by default, so that there will be time for a smooth transition in, for example, KStars.

[pawel-soja]

@knro Ready for review.
In this pull request additionally downgraded version for CMakeLists to 3.13 and added Debian Buster for CI.

[knro]

Looks like this causes our Launchpad debian builds to fail. Can you please check? We need an urgent fix.

[pawel-soja]

I think I have reproduced the problem. I'll analyze what's going on right now. Later, I will also add a package build to CI for the future.

[pawel-soja]

indiclient.so never built before, when I added options to build static and shared libraries, by default the shared library is additionally built. From what I can see, other libraries in INDI Core want to link it instead of static.

[pawel-soja]

Fixed: #1776