[issue18235] _sysconfigdata.py wrong on AIX installations

[Michael Felt]

Michael Felt added the comment:

The "key" bit of the patch is to move the code AND make this assignment:

    if _PYTHON_BUILD:
        vars['LDSHARED'] = vars['BLDSHARED']

Besides, imho, skipping around the problem that LDSHARED is not correctly assigned - it cannot work because BLDSHARED is not set to the 'installed' value.

And, frankly I am amazed (in Python3-3.6.0) both are equal AND both pointing at the 'installed' location.

OOPS: I just looked and the patch above is NOT in the Python3-3.6 branch, and as both variables are identical now in _sysconfigdata_m_aix5.py - neither assignment has any affect.

Again: comparing python2 and python3 it seems the latest Python3 now have the fullpath - and equal definitions - for both variables WHILE Python2 use 'relative' pathnames - BUT both are equal.

As far as the patch goes - it is irrevalant and can be removed in Python3 while a quick hack for Python2 would be to use (in the new location!)

    if _PYTHON_BUILD:
        vars['LDSHARED'] = vars['LDCXXSHARED']

Details:
root at x064:[/data/prj/python]grep SHARED python*/X64/opt/lib/python*/_sysconfig*.py | grep LD
python-2.7.12.0/X64/opt/lib/python2.7/_sysconfigdata.py: 'BLDSHARED': './Modules/ld_so_aix xlc_r -bI:./Modules/python.exp',
python-2.7.12.0/X64/opt/lib/python2.7/_sysconfigdata.py: 'LDCXXSHARED': '/opt/lib/python2.7/config/ld_so_aix xlc_r -bI:/opt/lib/python2.7/config/python.exp',
python-2.7.12.0/X64/opt/lib/python2.7/_sysconfigdata.py: 'LDSHARED': './Modules/ld_so_aix xlc_r -bI:./Modules/python.exp',
python-2.7.13/X64/opt/lib/python2.7/_sysconfigdata.py: 'BLDSHARED': 'Modules/ld_so_aix xlc_r -bI:Modules/python.exp -L/opt/lib',
python-2.7.13/X64/opt/lib/python2.7/_sysconfigdata.py: 'LDCXXSHARED': '/opt/lib/python2.7/config/ld_so_aix xlc_r -bI:/opt/lib/python2.7/config/python.exp',
python-2.7.13/X64/opt/lib/python2.7/_sysconfigdata.py: 'LDSHARED': 'Modules/ld_so_aix xlc_r -bI:Modules/python.exp -L/opt/lib',
python3-3.5.2/X64/opt/lib/python3.5/_sysconfigdata.py: 'BLDSHARED': '/opt/lib/python3.5/config/ld_so_aix xlc_r '
python3-3.5.2/X64/opt/lib/python3.5/_sysconfigdata.py: 'LDCXXSHARED': '/opt/lib/python3.5/config/ld_so_aix xlc_r '
python3-3.5.2/X64/opt/lib/python3.5/_sysconfigdata.py: 'LDSHARED': '/opt/lib/python3.5/config/ld_so_aix xlc_r '
python3-3.6.0/X64/opt/lib/python3.6/_sysconfigdata_m_aix5_.py: 'BLDSHARED': '/opt/lib/python3.6/config-3.6m/ld_so_aix xlc_r '
python3-3.6.0/X64/opt/lib/python3.6/_sysconfigdata_m_aix5_.py: 'LDCXXSHARED': '/opt/lib/python3.6/config-3.6m/ld_so_aix xlc_r '
python3-3.6.0/X64/opt/lib/python3.6/_sysconfigdata_m_aix5_.py: 'LDSHARED': '/opt/lib/python3.6/config-3.6m/ld_so_aix xlc_r '

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18235>
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