[issue7658] OS X pythonw.c compile error with 10.4 or earlier deployment target: no spawn.h

[Martin v. Löwis]

Martin v. Löwis <martin at v.loewis.de> added the comment:

To elaborate, it should be possible to declare the posix_spawnp functions as __attribute__((weak)), and then test at run-time whether the function (pointers) are null. See http://tinyurl.com/y8myawg for an example.

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