Parser/asdl_c.py requires python in order to build python

[gpshead]

BPO	3870
Nosy	@theller, @gpshead, @benjaminp

^{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 2008-09-14.23:20:18.596>
created_at = <Date 2008-09-14.22:51:32.146>
labels = ['build', 'invalid']
title = 'Parser/asdl_c.py requires python in order to build python'
updated_at = <Date 2008-09-17.18:44:58.690>
user = 'https://github.com/gpshead'

bugs.python.org fields:

activity = <Date 2008-09-17.18:44:58.690>
actor = 'theller'
assignee = 'none'
closed = True
closed_date = <Date 2008-09-14.23:20:18.596>
closer = 'benjamin.peterson'
components = ['Build']
creation = <Date 2008-09-14.22:51:32.146>
creator = 'gregory.p.smith'
dependencies = []
files = []
hgrepos = []
issue_num = 3870
keywords = []
message_count = 3.0
messages = ['73238', '73240', '73340']
nosy_count = 3.0
nosy_names = ['theller', 'gregory.p.smith', 'benjamin.peterson']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = None
status = 'closed'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue3870'
versions = ['Python 2.6', 'Python 2.5', 'Python 3.0']

[gpshead]

Parser/asdl_c.py starts with "#! /usr/bin/env python" and is required
when building python. The prevents python from being built on systems
without an existing python interpreter installed. Which came first, the
python or the egg?

found when attempting to build python from subversion on FreeBSD 6.3.

This is what make trys to run that fails:

./Parser/asdl_c.py -h ./Include Parser/Python.asdl

[benjaminp]

Yes, that's why what it builds is included in the svn repo by default.
You can avoid the build problems by touching Include/Python-ast.h and
Python/Python-ast.c.

[theller]

I think it would be a good idea to change the Makefile so that it
touches these files when no python interpreter is available.