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CPython does not record and propagate linker flags to LDCXXSHARED in sysconfig #123297
Description
CPython records and propagates several compilation-related flags from the time CPython is built, which in turn are used by distutils and setuptools to pass them to extension modules.
Unfortunately after pypa/distutils#228, distutils now introduced a new LDCXXSHARED, and are using that in preference to LDSHARED when linking C++ code. We do set LDCXXSHARED but we don't propagate LDFLAGS to that variable if the user has set in the environment.
This is a problem because many distributions use the old variable LDFLAGS to propagate linker flags to extension modules (such as hardening and configuration flags) and now these are silently failing for C++ extension modules.
Activity
[-]CPython does not record and propagate LDCXXSHARED in sysconfig[/-][+]CPython does not record and propagate linker flags to LDCXXSHARED in sysconfig[/+]pythongh-123297: Propagate LD_FLAGS to LDCXXSHARED in sysconfig
gh-123297: Propagate LD_FLAGS to LDCXXSHARED in sysconfig (#123298)
pythongh-123297: Propagate LD_FLAGS to LDCXXSHARED in sysconfig (pyth…
pythongh-123297: Propagate LD_FLAGS to LDCXXSHARED in sysconfig (pyth…
[3.12] gh-123297: Propagate LD_FLAGS to LDCXXSHARED in sysconfig (GH-…
[3.13] gh-123297: Propagate LD_FLAGS to LDCXXSHARED in sysconfig (GH-…