[MacPorts] #57493: esmf @7_1_0r +gcc8: build error: 'size_t' does not name a type

[MacPorts]

#57493: esmf @7_1_0r +gcc8: build error: 'size_t' does not name a type
---------------------------+----------------------
  Reporter:  Dave-Allured  |      Owner:  tenomoto
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.5.4
Resolution:                |   Keywords:
      Port:  esmf          |
---------------------------+----------------------

Comment (by Dave-Allured):

 The cause of this problem was found.  It is simply a missing `include`
 statement for `cstddef` in `ESMC_Conf.h`.  However, because of the unusual
 use of many customized copies of this file, the missing `include` should
 probably go into a few higher level files, not into `ESMC_Conf.h`
 directly.

 This bug is triggered by all `GCC 8` and higher versions, due to a
 specific test for `GCC` version number in `ESMC_Conf.h`.  This bug can be
 avoided by installing either the port `esmf` default variant, which uses
 `clang`, or else `+gcc7` or earlier variants.

 ESMF developers already fixed this in their own code base.  I am waiting
 for a pubic release to update Macports.  If someone needs a fix sooner,
 please request or submit a patch to the current version.

-- 
Ticket URL: <https://trac.macports.org/ticket/57493#comment:7>
MacPorts <https://www.macports.org/>
Ports system for macOS