tree dfbbc9b015c82d41d399e43f2d41c35aeeb4f4d4
parent 00590a4a42bf82b4777dc94fc3daefdc8d04f798
author Aaron Puchert <aaronpuchert@alice-dsl.net> 1601584290 +0200
committer Copybara-Service <copybara-worker@google.com> 1604018490 -0700

libclc: Use find_package to find Python 3 and require it

The script's shebang wants Python 3, so we use FindPython3. The
original code didn't work when an unversioned python was not available.
This is explicitly allowed in PEP 394. ("Distributors may choose to set
the behavior of the python command as follows: python2, python3, not
provide python command, allow python to be configurable by an end user
or a system administrator.")

Also I think it's actually required, so let the configuration fail if we
can't find it.

Lastly remove the shebang, since the script is only run via interpreter
and doesn't have the executable bit set anyway.

Reviewed By: jvesely

Differential Revision: https://reviews.llvm.org/D88366

GitOrigin-RevId: 1c1a8105580784c96212db1afc097a844740bc69