[MacPorts] #67275: R-fs fails to build on Tiger (in libuv): error: void value not ignored as it ought to be if (unsetenv(name) != 0)

[MacPorts]

#67275: R-fs fails to build on Tiger (in libuv): error: void value not ignored as
it ought to be if (unsetenv(name) != 0)
---------------------------+--------------------
  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:  tiger
      Port:  R-fs          |
---------------------------+--------------------

Comment (by kencu):

 to get the new unsetenv behaviour on Tiger, you need to have this defined:
 {{{
 __DARWIN_UNIX03
 }}}

 by patch, flag, hack, compiler wrap, hook-or-by-crook, however you get it
 defined.

 (The build seem to be hiding the build lines still, so you have no idea
 what is defined and what is not defined just now -- you have to disable
 silent rules, increase the verbosity, etc, etc ,etc to see what you are
 sending the compiler).

-- 
Ticket URL: <https://trac.macports.org/ticket/67275#comment:1>
MacPorts <https://www.macports.org/>
Ports system for macOS