New submission from Matthias Klose <d...@debian.org>:

For a cross build, make tries to run pgen built for the host machine, not the 
build machine. However it is not necessary to run pgen at all if all the files 
are up to date. This change implements it.

The release script (if something like this exists) should make sure that the 
time stamps are correct, and then pgen isn't even built for a native build.

reviewed by MvL

----------
assignee: doko
components: Build
files: pgen.diff
keywords: patch
messages: 155910
nosy: doko
priority: normal
severity: normal
status: open
title: Do not run pgen during the build if files are up to date
versions: Python 3.3
Added file: http://bugs.python.org/file24864/pgen.diff

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