New submission from Omer Ozarslan :
distutils honors some environment variables during extension build, however,
LDFLAGS is appended before declaring object files. This causes undefined
symbols during importing an extension built with some static libraries using
this environment variable. This is not apparent in the case of dynamic linking,
but it can be observed by adding "-Wl,--as-needed" flag, since this will link
libraries only if they are required. Therefore, it will be necessary to add
them after object files in case of dynamic linking as well in that case.
I believe this part is the culprit as it appends LDFLAGS environment variable
to executable name:
https://github.com/python/cpython/blob/c994c8f/Lib/distutils/sysconfig.py#L211-L235
I attached a minimal example (it requires cython, which relies on distutils for
compilation).
It would be nice if LDFLAGS is appended after object files, or a new
environment variable (e.g. LDLIBS) is introduced to distutils to be appended
after object files.
--
components: Distutils
files: python-issue.tar.gz
messages: 348436
nosy: dstufft, eric.araujo, ozars
priority: normal
severity: normal
status: open
title: distutils appends LDFLAGS environment variable before object file names
Added file: https://bugs.python.org/file48505/python-issue.tar.gz
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