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_sysconfigdata.py doesn't support multiple build configurations #58979

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davidmalcolm opened this issue May 10, 2012 · 5 comments
Closed

_sysconfigdata.py doesn't support multiple build configurations #58979

davidmalcolm opened this issue May 10, 2012 · 5 comments
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build The build process and cross-build type-bug An unexpected behavior, bug, or error

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@davidmalcolm
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BPO 14774
Nosy @pitrou, @tpn, @merwok, @davidmalcolm

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 = None
closed_at = <Date 2012-10-13.17:22:05.986>
created_at = <Date 2012-05-10.19:47:33.515>
labels = ['type-bug', 'build']
title = "_sysconfigdata.py doesn't support multiple build configurations"
updated_at = <Date 2012-10-13.17:22:05.984>
user = 'https://github.com/davidmalcolm'

bugs.python.org fields:

activity = <Date 2012-10-13.17:22:05.984>
actor = 'trent'
assignee = 'none'
closed = True
closed_date = <Date 2012-10-13.17:22:05.986>
closer = 'trent'
components = ['Build']
creation = <Date 2012-05-10.19:47:33.515>
creator = 'dmalcolm'
dependencies = []
files = []
hgrepos = []
issue_num = 14774
keywords = []
message_count = 5.0
messages = ['160366', '160367', '160385', '160401', '172814']
nosy_count = 5.0
nosy_names = ['pitrou', 'trent', 'eric.araujo', 'Arfrever', 'dmalcolm']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue14774'
versions = ['Python 3.3']
@davidmalcolm
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When building from source, if I create multiple configuration directories and build from there e.g.:

mkdir configs
cd configs
mkdir config-A
cd config-A
../../configure
make
cd ..
mkdir config-B
cd config-B
../../configure --enable-shared
make
cd ../config-A
./python -c "import sysconfig; print(sysconfig.get_config_var('CONFIG_ARGS')

then sysconfig's settings are the same for *every* config, reflecting those of the last build (config-B above, rathern than those of config-A).

This turns out to be due to this:
./python -SE -m sysconfig --generate-posix-vars
This generates $(srcdir)/Lib/_sysconfigdata.py for whichever config was last

Is there a way of fixing this whilst keeping it a python file? Or do we need to build from a C file, perhaps?

@davidmalcolm davidmalcolm added build The build process and cross-build type-bug An unexpected behavior, bug, or error labels May 10, 2012
@davidmalcolm
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Note to self: workaround is to
rm ../../Lib/_sysconfigdata.py || make ../../Lib/_sysconfigdata.py
before running my tests in either configuration, to force the file to be regenerated using what "make" thinks the settings are

@merwok
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merwok commented May 10, 2012

Would always recreating _sysconfigdata.py solve the problem?

@pitrou
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pitrou commented May 11, 2012

Is there a way of fixing this whilst keeping it a python file? Or do
we need to build from a C file, perhaps?

Well I hope we don't make it a C file just for that reason. It would complicate the generation code quite a bit (right now it's just 3 lines long).

I tend to use separate clones myself (actually, I use "hg share" to avoid multiple pulls).

@tpn
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tpn commented Oct 13, 2012

I'm pretty sure this is a duplicate of http://bugs.python.org/issue15298 (which should be fixed shortly).

Feel free to re-open if I'm wrong.

@tpn tpn closed this as completed Oct 13, 2012
@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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@tpn @merwok @davidmalcolm @pitrou