Martin Panter added the comment:
Here is another possible option. It is still a bit of a hack, because the
configure script inserts comments into the makefile, but this is already done
e.g. with @EXPORT_MACOSX_DEPLOYMENT_TARGET@. The advantage is we get to keep
the filenames of the dependencies in the makefile, so it should be easier to
read and maintain. And we get to eliminate the $(cross_compiling) check as well.
In native compiling mode, everything should be as normal. When cross-compiling,
the rules for regenerating files should read like
Python/importlib.h: # $(srcdir)/Lib/importlib/_bootstrap.py
Programs/_freeze_importlib
./Programs/_freeze_importlib \
$(srcdir)/Lib/importlib/_bootstrap.py Python/importlib.h
Since the Python/importlib.h should already exist, the rule in this form
(dependencies commented out) won’t be run, and Make won’t need to build
Programs/_freeze_importlib either.
----------
stage: -> patch review
versions: +Python 3.5
Added file: http://bugs.python.org/file43933/comment-out-regen.patch
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<http://bugs.python.org/issue27641>
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