undefined reference to _clock_gettime

[Lane, Frank L]

After including time.h and trying to generate an executable ld bombs with
ERROR 1 and
tells me it has an undefined reference to _clock_gettime.  gettime is
declared in time.h.  I looked.

Any ideas what I'm missing.  I looked through the install packages and
couldn't figure 
out what to download.

Thanks for any help,
Frank

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