[MacPorts] #65337: openmpi @4.1.4: subports openmpi-gcc7 and openmpi-gcc9: builds failing for 10.7 and earlier

[MacPorts]

#65337: openmpi @4.1.4: subports openmpi-gcc7 and openmpi-gcc9: builds failing for
10.7 and earlier
---------------------+---------------------------------------
 Reporter:  mascguy  |      Owner:  mascguy
     Type:  defect   |     Status:  assigned
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.7.2
 Keywords:           |       Port:  openmpi-gcc7 openmpi-gcc9
---------------------+---------------------------------------
 While previous releases of `openmpi-gcc7` and `openmpi-gcc9` build
 successfully for 10.7 and earlier, the latest version fails on our
 buildbots:

 {{{
 checking whether the C compiler works... no
 configure: error: C compiler cannot create executables
 }}}

 * https://ports.macports.org/port/openmpi-gcc7/details/
 * https://ports.macports.org/port/openmpi-gcc9/details/

 Currently travelling, without access to my suite of macOS VMs, so I can't
 try to reproduce this locally. But I'm hoping it's something related to
 `stdlib`, such as this prior issue with `gdal`:

 [https://trac.macports.org/ticket/59989#comment:5 59989 - gdal +gcc:
 configure: error: C compiler cannot create executables]

-- 
Ticket URL: <https://trac.macports.org/ticket/65337>
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