osqp Make CMake compatible with nix

Add a EXTERNAL_QDLDL and QDLDL_ROOT to allow fetch content to work
remove $<INSTALL_PREFIX> from $<INSTALL_INTERFACE:...> This is a continuation of #481

Jul 23 '23 23:07 notalltim

All committers have signed the CLA.

Jul 23 '23 23:07 CLAassistant

remove $<INSTALL_PREFIX> from $<INSTALL_INTERFACE:...>

This is already going to be merged as part of https://github.com/osqp/osqp/pull/559, since no one replied to my last question on that PR I just implemented what resources online were saying was the best way.

Jul 24 '23 09:07 imciner2

Awesome I missed that does making the external project using the internet optional make sense? I can rebase if it makes things easier

Jul 24 '23 22:07 notalltim

does making the external project using the internet optional make sense

We had originally planned for a separate QDLDL to be usable, but that accidentally got missed during the major CMake rework. So we'd gladly accept any changes to make that possible.

Jul 25 '23 11:07 imciner2

@imciner2 Is this what you were looking for or did you have something else in mind?

Oct 31 '23 01:10 notalltim

@imciner2 Still interested in getting this merged. Do you have any more requests?

Feb 19 '24 03:02 notalltim

I apparently can't retarget this to the master branch after deleteing the old branch. Sorry about that, I thought I could do that after merging that.

Apr 04 '24 19:04 imciner2