[issue18235] _sysconfigdata.py wrong on AIX installations

[Marc-Andre Lemburg]

Marc-Andre Lemburg added the comment:

On 24.01.2017 15:23, Michael Felt wrote:
> As far as issue10656 and this issue are concerned:
> 
> Python-3.4 is out of context (but 3.4.6 was just released) - and does not work with 'out of tree' builds. 
> 
> The other versions: 2.7.13, 3.5.3 and 3.6.0 do build out-of-tree.
> Note 3.5.3 and 3.6.0 use a different name for sysconfigdata.py

I'm not sure what you mean with "out of tree". When building
Python, you are supposed to use the source code directory
as work dir.

> Notes:
> 
> FYI: regarding build and src in different directories
> 
> Not working...
> 
> unable to execute '../src/Python-3.4.6/Modules/ld_so_aix': No such file or directory
> unable to execute '../src/Python-3.4.6/Modules/ld_so_aix': No such file or directory
>  many many times
> 
> Concludes with:
> ImportError: No module named 'time'
> make: 1254-004 The error code from the last command is 1.
> make: 1254-005 Ignored error code 1 from last command.
> ../src/Python-3.4.6/install-sh: ../src/Python-3.4.6/Modules/ld_so_aix does not exist
> make: 1254-004 The error code from the last command is 1.
> 
> root at x064:[/data/prj/python/Python-3.4.6]find . -name _sysconfigdata.py -ls -exec grep LDSHARED {} \;
> 48049316   19 -rw-r-----  1 root      felt         19209 Jan 24 13:55 ./build/lib.aix-5.3-3.4/_sysconfigdata.py
>  'BLDSHARED': '/opt/lib/python3.4/config/ld_so_aix xlc_r '
>  'LDSHARED': '/opt/lib/python3.4/config/ld_so_aix xlc_r '

This is strange: where does the "../src/Python-3.4.6/Modules/ld_so_aix"
originate if the paths in the sysconfig file are absolute ?

> +++++++ Working ++++++++
> 
> Working: 2.7.13 -- Note: the 'lines' in sysconfig.py are removed:
> root at x064:[/data/prj/python/Python-2.7.13.0]find . -name _sysconfigdata\*.py -ls -exec grep LDSHARED {} \;
> 48038426   16 -rw-r-----  1 root      felt         15807 Jan 24 13:36 ./build/lib.aix-5.3-2.7/_sysconfigdata.py
>  'BLDSHARED': 'Modules/ld_so_aix xlc_r -bI:Modules/python.exp',
>  'LDSHARED': '/opt/lib/python2.7/config/ld_so_aix xlc_r -bI:/opt/lib/python2.7/config/python.exp',

BLDSHARED should be fixed to use an absolute path, I guess.

> Working: 3.5.3
> 48049196   21 -rw-r-----  1 root      felt         20640 Jan 24 13:55 ./build/lib.aix-5.3-3.5/_sysconfigdata.py
>  'BLDSHARED': '/opt/lib/python3.5/config-3.5m/ld_so_aix xlc_r '
>  'LDSHARED': '/opt/lib/python3.5/config-3.5m/ld_so_aix xlc_r '

Here BLDSHARED is wrong, but shouldn't do any harm since
it's only used for building Python itself, not for
extension modules.

> Working: 3.6.0 -- Note new file name!!
> root at x064:[/data/prj/python/Python-3.6.0]find . -name _sysconfigdata\*.py -ls -exec grep LDSHARED {} \;
> 47794146   20 -rw-r-----  1 root      felt         20394 Jan 24 13:49 ./build/lib.aix-5.3-3.6/_sysconfigdata_m_aix5_.py
>  'BLDSHARED': 'Modules/ld_so_aix xlc_r -bI:Modules/python.exp',
>  'LDSHARED': '/opt/lib/python3.6/config-3.6m/ld_so_aix xlc_r '

This looks odd and like a regression. Again, the path
should be absolute and point to the build tree, not the
installation tree.

PS: The BLDSHARED setting in sysconfig is not really relevant.
It's only there because we have it in the Makefile.

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<http://bugs.python.org/issue18235>
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