[MacPorts] #69631: gcc-devel does not build on Sonoma: error: call to undeclared function 'dup2'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]

[MacPorts]

#69631: gcc-devel does not build on Sonoma: error: call to undeclared function
'dup2'; ISO C99 and later do not support implicit function declarations
[-Wimplicit-function-declaration]
---------------------------+--------------------
  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.9.1
Resolution:                |   Keywords:  sonoma
      Port:  gcc-devel     |
---------------------------+--------------------

Comment (by ryandesign):

 In addition, the problem may be that the earlier `#elif defined(F_GETFD)`
 path isn't being taken. On my macOS 12 SDK I see `F_GETFD` is defined in
 <fcntl.h> which filedescriptor.c does include but only if `HAVE_FCNTL_H`
 is defined. Maybe there is a bug in the configure script test and
 `HAVE_FCNTL_H` isn't getting defined; check your config.log.

-- 
Ticket URL: <https://trac.macports.org/ticket/69631#comment:2>
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