[gccsdk] Patch to correctly set _XOPEN_SOURCE when _POSIX_C_SOURCE is defined

Cameron Cawley ccawley2011 at gmail.com
Wed Aug 7 06:53:02 PDT 2019


This patch ensures that _XOPEN_SOURCE is set correctly when _POSIX_C_SOURCE
is greater than or equal to 200112L. Previously, defining _POSIX_C_SOURCE
to 200112L would enable XPG6 functions, but not functions for earlier XPG

See also the discussion in https://github.com/nmoinvaz/minizip/pull/410

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