CMake must be installed to build OSQP about osqp-python

[ChemGuy88]

Hi. I was installing scikit-survival, which has OSQP as one of its requirements (?), and it kept throwing some errors. I stumbled across this thread and did python3 -m pip install --user cmake and afterwards python3 -m pip install --user scikit-survival finally worked.

I'm on a 2016 MacBook Pro macOS 11.0.1 with python 3.8. I don't know if this will inform your development any.

[goulart-paul]

It is a good idea. Please make a PR.

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________________________________ From: Krishnan R <[email protected]> Sent: Thursday, May 31, 2018 10:47:21 AM To: oxfordcontrol/osqp-python Cc: Subscribed Subject: [oxfordcontrol/osqp-python] CMake must be installed to build OSQP (#4) It seems this package needs CMake during a pip install. RuntimeError: CMake must be installed to build OSQP If I do pip install cmake it works after. Can't cmake be added to the setup_requires field in setup.py? This would make the installation process smoother from many libraries that depend on this one. I'll make a PR if this can be done? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub<#4>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AGhaqTnntQ8VG4VrShmLh5IMn_IBWGcPks5t37wpgaJpZM4UUvo2>.

[bstellato]

Thanks! Added it in 4078327

[krishnan-r]

I'm sorry this doesn't work as expected. The setup_requires option does not install the package in a full fledged way, it only downloads it temporarily into a local folder, making packages importable. It works for cases like numpy, where it can be imported from within a custom command in setup.py. But cmake is called in setup.py as a subprocess (also before the setup function), which requires it to be in the sys path. Perhaps cmake needs to be called as a python module.

I tried installing the master branch, but doesn't work.

[bstellato]

The best option is to install cmake separately independently from the language. That's what we suggest in the instructions.

The fact that OSQP is not directly installed using a binary is probably because you are using pip and linux (see #3). Note that cmake is also needed for code generation.

[krishnan-r]

Yes you are right. I guess then CMake is best installed separately.

[bstellato]

I have reverted the commit in 8336546. I will close the issue since it looks like it will not appear again when we release the manylinux binaries.