[MacPorts] #64349: ruby31: error: use of undeclared identifier 'MAP_ANONYMOUS'

[MacPorts]

#64349: ruby31: error: use of undeclared identifier 'MAP_ANONYMOUS'
------------------------+----------------------
 Reporter:  ryandesign  |      Owner:  kimuraw
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.7.1
 Keywords:              |       Port:  ruby31
------------------------+----------------------
 https://build.macports.org/builders/ports-10.10_x86_64-builder/builds/166925/steps
 /install-port/logs/stdio
 {{{
 gc.c:11141:88: error: use of undeclared identifier 'MAP_ANONYMOUS'
         char *ptr = mmap(NULL, alignment + size, PROT_READ | PROT_WRITE,
 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 ^
 1 error generated.
 }}}
 On old systems, `MAP_ANONYMOUS` was called `MAP_ANON`. If the developers
 don't want to add support for this, the legacy support portgroup could be
 used.

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Ticket URL: <https://trac.macports.org/ticket/64349>
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