[issue17679] sysconfig generation uses some env variables multiple times

[Bohuslav "Slavek" Kabrda]

Bohuslav "Slavek" Kabrda added the comment:

I'm attaching a patch that I'm currently using to solve this. It works, but it's a bit aggressive - in the sense that it only adds a string to the sysconfig variable iff this string is not a substring of current variable value. So it may corrupt some values, e.g. it wouldn't add "python" to variable if that variable already had "/usr/lib/python". But it seems to get all the values just fine for me.

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keywords: +patch
Added file: http://bugs.python.org/file29763/00178-dont-duplicate-flags-in-sysconfig.patch

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