Undefined F_SETSIG macro

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Dec 6, 2017, 10:29:44 PM12/6/17

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I am attempting to use the following code to set the signal for an asynchronous read.

I get an error during compile that indicates that F_SETSIG is missing.

The following symbols have been defined for the compile

__USE_GNU

_GNU_SOURCE

This eliminated except the missing F_SETSIG.

Any ideas?

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