Allow to install the library as a CMake project

[CharlesGueunet]

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What does this implement/fix? Explain your changes.

These changes add the cmake mechanism to install the project so it can be used in a find_package by other projects.

Any relevant logs, error output, etc?

There is one change in this MR which is just commenting some lines causing a linker error on recent clang compilers. The error is provided in comment

Where has this been tested?

Operating System: Gentoo Linux

I also used fespp to ensure this library is correctly installed.

Other comments:

This PR is related to another MR updating fespp to uses this library as expected (will be provided here when available).

[philippeVerney]

Thanks a lot @CharlesGueunet
I try to look at it deeper next week and wil let you know.

[philippeVerney]

@CharlesGueunet Would it be possible to target the dev branch instead of the master one?

[CharlesGueunet]

@CharlesGueunet Would it be possible to target the dev branch instead of the master one?

Done

I try to look at it deeper next week and wil let you know.

Thank you

[philippeVerney]

Thanks for all this work.
Not sure to have enough CMAKE knowledge to deeply understand the proposed changes but hopefully my review should be a bit useful.
I have a commit to push/patch right after this review.

[philippeVerney]

Here is a patch trying to resolve my comments above.
0001-Proposal-after-review.patch

I also rebased on origin/dev to check and it is fine.

[CharlesGueunet]

Here is a patch trying to resolve my comments above. 0001-Proposal-after-review.patch

I have applied your changes and rebuild successfully on my side.

Best,
Charles