Problems with <tgmath.h>

[Ulrich Drepper]

Daniel Jacobowitz <drow@false.org> writes:

> In which case, I would think it appropriate for _ISOC9X_SOURCE
> undefined to be an error in tgmath.h.

It's also undefined to include unistd.h without defining _POSIX_SOURCE
or something which includes it.  If you are using the header you must
know where it comes from.  Otherwise you wouldn't use it.

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