MSVC .pdb files not created by python 2.7 distutils

[jpe]

BPO	9745
Nosy	@loewis, @theller, @tarekziade, @merwok
Superseder	bpo-4214: no extension debug info with msvc9compiler.py

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/tarekziade'
closed_at = <Date 2014-07-10.10:48:32.995>
created_at = <Date 2010-09-02.15:52:13.968>
labels = ['type-bug', 'library', 'OS-windows']
title = 'MSVC .pdb files not created by python 2.7 distutils'
updated_at = <Date 2014-07-10.10:48:32.994>
user = 'https://bugs.python.org/jpe'

bugs.python.org fields:

activity = <Date 2014-07-10.10:48:32.994>
actor = 'berker.peksag'
assignee = 'tarek'
closed = True
closed_date = <Date 2014-07-10.10:48:32.995>
closer = 'berker.peksag'
components = ['Distutils', 'Windows']
creation = <Date 2010-09-02.15:52:13.968>
creator = 'jpe'
dependencies = []
files = []
hgrepos = []
issue_num = 9745
keywords = []
message_count = 6.0
messages = ['115389', '115576', '222615', '222632', '222634', '222635']
nosy_count = 6.0
nosy_names = ['loewis', 'theller', 'jpe', 'tarek', 'eric.araujo', 'BreamoreBoy']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '4214'
type = 'behavior'
url = 'https://bugs.python.org/issue9745'
versions = ['Python 2.7', 'Python 3.4', 'Python 3.5']

[jpe]

.pdb files are not created because /pdb:None is set as an option on line 415 of msvc9compiler.py. Removing the /pdb:None works to write the .pdb file and allow symbols to be loaded in the VS 2008 debugger in the one extension I tried. Anyone know why /pdb:None was added?

[loewis]

See the subversion history. It was added in r14344, which supposedly originated from Thomas Heller, so he should know.

Thomas, what's the reason for suppressing PDB files?

[BreamoreBoy]

/pdb:None is still set in msvc9compiler.py. Does this need changing in this file, or a more modern equivalent, so that symbols can be loaded in the debugger?

[BreamoreBoy]

/pdb:None is referenced on bpo-4214. As there is more detail on that issue I recommend that this is closed.

[jpe]

Are you saying close this as a duplicate? That would be fine with me. I still think the /pdb:None should be removed if it hasn't been already.

[BreamoreBoy]

Yes, close this as a duplicate. I'll put up a patch on bpo-4214.