workaround for ruamel.yaml.clib error (it fails to compile with clang > =16)

[tingox]

Environment

nikola running in a Python venv

Python Version:

(nikola) tingo@kg-core2:~/personal/projects/nikola % which python
/usr/home/tingo/.venv/nikola/bin/python
(nikola) tingo@kg-core2:~/personal/projects/nikola % python --version
Python 3.11.9

Nikola Version:

(nikola) tingo@kg-core2:~/personal/projects/nikola % nikola version
Nikola v8.3.1

Operating System:

nikola) tingo@kg-core2:~/personal/projects/nikola % freebsd-version -ku
13.4-RELEASE-p1
13.4-RELEASE-p1
(nikola) tingo@kg-core2:~/personal/projects/nikola % uname -a
FreeBSD kg-core2.kg4.no 13.4-RELEASE-p1 FreeBSD 13.4-RELEASE-p1 GENERIC amd64

Description:

There is a bug in ruamel.yaml.clib #22 it fails to compile with clang 16 (or newer). This makes it hard to install nikola on FreeBSD, which has clang as default compiler. FreeBSD 13.4 has clang 18

(nikola) tingo@kg-core2:~/personal/projects/nikola % which cc
/usr/bin/cc
(nikola) tingo@kg-core2:~/personal/projects/nikola % cc --version
FreeBSD clang version 18.1.6 (https://github.com/llvm/llvm-project.git llvmorg-18.1.6-0-g1118c2e05e67)
Target: x86_64-unknown-freebsd13.4
Thread model: posix
InstalledDir: /usr/bin

a patch for ruamel.yaml.clib exists in the FreeBSD port, but is not currently in upstream. Until this issue is fixed, the following workaround can be used:

1. download ruamel.yaml.clib locally, using pip downloadfor example, also download or get the patch file from FreeBSD.
2. patch the source file with the patch from the FreeBSD port
3. install Nikola like this bin/python -m pip install -U "Nikola[extras]" ./ruamel.yaml.clib-0.2.8
   (refer to the location of your locally patched ruamel.yaml.clib source)
4. profit