[MacPorts] #57937: gcc9 @9-20181007_1: Compiler fails for trivial program indicating that _stdio.h is missing (also fails for gcc7 and gcc8).

[MacPorts]

#57937: gcc9 @9-20181007_1: Compiler fails for trivial program indicating that
_stdio.h is missing (also fails for gcc7 and gcc8).
---------------------------------------+--------------------
  Reporter:  aszostak-partner-eso-org  |      Owner:  (none)
      Type:  defect                    |     Status:  new
  Priority:  Normal                    |  Milestone:
 Component:  ports                     |    Version:  2.5.4
Resolution:                            |   Keywords:
      Port:  gcc7 gcc8 gcc9            |
---------------------------------------+--------------------

Comment (by jmon12):

 Hi all,
 I'm experiencing the same issue with a simple hello world program. I'm
 getting exactly the same error as mentioned above: _stdio.h is not found.
 The following compilers have been tested: \\
 1) macports' **gcc5,6,7,8** -> ''failure'' \\
 2) **apple's clang** (Apple LLVM version 10.0.1 (clang-1001.0.46.4) ->
 ''success'' \\
 3) **macports's clang** 8.0.0 -> ''success'' \\


 The **command line tools version 10.3.0.0.1.1562985497** is installed. The
 _stdio.h file is located at /usr/include as it should. Is there something
 wrong with my macports installation? I'm available if you need any
 supplementary information.

-- 
Ticket URL: <https://trac.macports.org/ticket/57937#comment:3>
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