build-installer fix for doc building on OSX 10.4

[db3l]

BPO	8475
Nosy	@loewis, @db3l, @ronaldoussoren
Files	build-installer.diff

^{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/ronaldoussoren'
closed_at = <Date 2010-04-22.13:18:27.804>
created_at = <Date 2010-04-20.22:53:23.029>
labels = ['OS-mac', 'build']
title = 'build-installer fix for doc building on OSX 10.4'
updated_at = <Date 2010-04-22.13:18:27.802>
user = 'https://github.com/db3l'

bugs.python.org fields:

activity = <Date 2010-04-22.13:18:27.802>
actor = 'loewis'
assignee = 'ronaldoussoren'
closed = True
closed_date = <Date 2010-04-22.13:18:27.804>
closer = 'loewis'
components = ['macOS']
creation = <Date 2010-04-20.22:53:23.029>
creator = 'db3l'
dependencies = []
files = ['17014']
hgrepos = []
issue_num = 8475
keywords = ['patch']
message_count = 3.0
messages = ['103790', '103954', '103963']
nosy_count = 3.0
nosy_names = ['loewis', 'db3l', 'ronaldoussoren']
pr_nums = []
priority = 'normal'
resolution = 'accepted'
stage = None
status = 'closed'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue8475'
versions = ['Python 2.6', 'Python 3.1', 'Python 2.7', 'Python 3.2', 'Python 3.3']

[db3l]

The attached suggested patch changes build-installer to pass along the same Python executable that it itself is running under to the documentation Makefile. This fixes an issue on OSX where pruning the PATH reverts to the system python (2.3.5) which is too old for Sphinx.

This does now mean that build-installer itself needs to be run under 2.5+ which contradicts its initial usage comments. I suspect we should just give up supporting it under 2.3, since an underlying tool no longer supports that, but have not changed those comments in this patch

[loewis]

Thanks for the patch. Committed as r80355-

[loewis]

It seems to work fine, so merged as r80365, r80366, r80367.