[MacPorts] #62708: tmux crashes when building with macOS SDK 11.0 on macOS 10.15

[MacPorts]

#62708: tmux crashes when building with macOS SDK 11.0 on macOS 10.15
---------------------+--------------------
 Reporter:  tgyurci  |      Owner:  (none)
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  tmux
---------------------+--------------------
 The macOS SDK 11.0 provides the function `strtonum` but it is not
 implemented in macOS 10.15.

 When using the latest Xcode (12.4) on macOS 10.15, `configure` detects
 that `strtonum` is available, but it does not check whether it's really
 usable or not.  This results that `tmux` is built, but it crashes when
 tries to call `strtonum` with crash log:

 {{{
 Dyld Error Message:
   Symbol not found: _strtonum
 }}}

 I have created an upstream fix for this, but it would be good to not wait
 for the next release and the fix would be included in the current port:

 https://github.com/tmux/tmux/commit/b2588eed03640dc74ffdbebd10c719064b575291

-- 
Ticket URL: <https://trac.macports.org/ticket/62708>
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