[issue26662] configure/Makefile doesn't check if "python" command works, needed to build Objects/typeslots.inc

[Xavier de Gaye]

Xavier de Gaye added the comment:

Following (and thanks to :) Martin's review and comments, this new patch:
* does not use the not portable '-e' echo option
* uses single quotes (') to avoid the escaping
* improves the error message

“make touch” does not always fix the problem, for example when Objects/typeslots.py has been modified or when this file has been touched, so it is not mentioned in the error message.

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Added file: http://bugs.python.org/file43792/py_for_gen_26662_2.patch

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