ruby-prof/ruby-prof — pull request #119 by edogawaconan (2013-05-10 06:12:57+00:00)
Title: -lrt is not needed in OpenBSD.

clock_gettime is in libc in OpenBSD. [1]

[1] http://www.openbsd.org/cgi-bin/cvsweb/ports/devel/ruby-prof/patches/patch-ext_ruby_prof_extconf_rb?rev=1.1