Bug report

Checklist

• I am confident this is a bug in CPython, not a bug in a third-party project
• I have searched theCPython issue tracker,
  and am confident this bug has not been reported before

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Output from running 'python -VV' on the command line:

Python 3.13.0a0 (heads/main:d4e534cbb3, Sep 2 2023, 21:58:58) [GCC 13.2.1 20230803 [revision cc279d6c64562f05019e1d12d0d825f9391b5553]]

A clear and concise description of the bug:

On openSUSE Tumbleweed 20230823, when CPython is compiled from source,

• lib-dynload is placed in/usr/local/lib64/python3.13.
• everything else is placed in/usr/local/lib/python3.13.

As a result, the interpreter is unable to locate some modules likereadline (even thoughreadline-devel is installed) and_posixsubprocess.

Here are the exact commands I ran.

$CFLAGS='-march=native -mtune=native' ./configure--enable-optimizations--with-lto=yes$make-j4$sudomake-j4altinstall$python3.13Couldnotfindplatformdependentlibraries<exec_prefix>Python3.13.0a0 (heads/main:d4e534cbb3,Sep22023,21:58:58) [GCC13.2.120230803 [revisioncc279d6c64562f05019e1d12d0d825f9391b5553]]onlinuxType"help","copyright","credits"or"license"formoreinformation.Traceback (mostrecentcalllast):File"/etc/pythonstart",line7,in<module>importreadlineModuleNotFoundError:Nomodulenamed'readline'>>>

Symlinkinglib-dynload fixed the problem for me:

$sudoln-s/usr/local/lib64/python3.13/lib-dynload/usr/local/lib/python3.13$python3.13Python3.13.0a0 (heads/main:d4e534cbb3,Sep22023,21:58:58) [GCC13.2.120230803 [revisioncc279d6c64562f05019e1d12d0d825f9391b5553]]onlinuxType"help","copyright","credits"or"license"formoreinformation.>>>

but I believe everything should go in/usr/local/lib, as happens on other Linux distributions I have used.

Linked PRs

• GH-108819: fix LIBDEST not honoring --with-platlibdir #133163