[Python-Dev] Bug in build system for cross-platform builds (original) (raw)

Xavier de Gaye xdegaye at gmail.com
Mon Mar 14 12:34:31 EDT 2016

On 03/14/2016 02:26 PM, R. David Murray wrote:

The repo-timestamp problem is addressed by the 'make touch' target.

And yes, checking in these platform-independent artifacts is very intentional: less to build, fewer external dependencies in the build process...you don't need to have python to build python, which you would have to if they were not checked in.

Changeset c2a53aa27cad [1] was commited in issue 22359 [2] to remove incorrect uses of recursive make. The changeset added executable binaries as prerequisites to the existing rules (Python/importlib.h and $(GRAMMAR_H)). This broke cross-compilation:

Actually the files need not be re-generated as their timestamps have been setup for that purpose with 'make touch'. So a solution to the problem introduced by this changeset when cross-compiling could be to remove the binaries as prerequisites of these rules and include the recipe of their corresponding rules, the one used to build the executable, into the recipes of the original rule. Also IMHO the Programs/_freeze_importlib.c can be used instead of Programs/_freeze_importlib.o as a prerequisite in the Python/importlib.h rule.

[1] https://hg.python.org/cpython/rev/c2a53aa27cad/ [2] http://bugs.python.org/issue22359

Xavier

More information about the Python-Dev mailing list