implement ability to disable automatic search path additions

[grobian]

BPO	7713
Nosy	@ronaldoussoren, @ned-deily, @merwok, @willingc

^{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 2018-09-13.15:00:16.436>
created_at = <Date 2010-01-16.15:01:28.714>
labels = ['type-bug', 'build']
title = 'implement ability to disable automatic search path additions'
updated_at = <Date 2018-09-13.15:00:16.413>
user = 'https://bugs.python.org/grobian'

bugs.python.org fields:

activity = <Date 2018-09-13.15:00:16.413>
actor = 'willingc'
assignee = 'none'
closed = True
closed_date = <Date 2018-09-13.15:00:16.436>
closer = 'willingc'
components = ['Build']
creation = <Date 2010-01-16.15:01:28.714>
creator = 'grobian'
dependencies = []
files = []
hgrepos = []
issue_num = 7713
keywords = []
message_count = 3.0
messages = ['97880', '97960', '325252']
nosy_count = 7.0
nosy_names = ['ronaldoussoren', 'ned.deily', 'eric.araujo', 'Arfrever', 'grobian', 'Neurogeek', 'willingc']
pr_nums = []
priority = 'normal'
resolution = 'out of date'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue7713'
versions = ['Python 3.2']

[grobian]

setup.py adds in various places hardcoded paths to locations in the filesystem that may contain libraries/includes to compile a given module or feature.

While this behaviour is probably interesting for some users, it is undesirable for distributions that use a package manager to track and install dependencies in a given offset on top of a host system such as Mac OS X, Solaris, AIX, HPUX, etc.

Examples are:
http://trac.macports.org/browser/trunk/dports/lang/python26/files/patch-setup.py.diff
http://www.mail-archive.com/openpkg-dev@openpkg.org/msg09547.html
http://overlays.gentoo.org/proj/alt/browser/trunk/prefix-overlay/dev-lang/python/files/python-2.5.1-no-usrlocal.patch

It would be great if there was a way to disable setup.py from looking for hardcoded paths, and instead completely rely on the behaviour of compiler and linker (or e.g. CFLAGS as given)

[ned-deily]

See also bpo-7724 which addresses the particular case of building with OS X SDKs.

[willingc]

Closing as the release has reached EOL.