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Simon Tatham f6d1fef2d7 Handle <limits.h> not defining PIPE_BUF.
According to POSIX, this can legally not be defined 'where the [...]
value is equal to or greater than the stated minimum, but where the
value can vary depending on the file to which it is applied'. So if
limits.h hasn't defined PIPE_BUF, we define it ourself to the stated
minimum, to wit, _POSIX_PIPE_BUF.

Apparently it is actually undefined by <limits.h> on GNU/Hurd: Debian
has been carrying this patch downstream for that reason.
2019-03-20 13:09:34 +00:00
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2018-12-01 17:04:44 +00:00
2018-12-01 17:04:44 +00:00