Paul Eggert wrote: > Recent versions of MacOS seem to have a _DARWIN_C_SOURCE flag that > has roughly the same role that _GNU_SOURCE has for GNU systems.
It's not "roughly the same". _GNU_SOURCE makes some symbols visible that are not visible by default. Whereas _DARWIN_C_SOURCE makes some symbols visible that are already visible by default but hidden when _POSIX_C_SOURCE is defined. The usual idiom in the MacOS X header files is #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) So, I expect that your change will be a no-op for almost everyone. Bruno -- In memoriam Dmitry Pavlov <http://en.wikipedia.org/wiki/Dmitry_Pavlov_(general)>
