[MacPorts] #62252: rust @1.47.0_0: Failed to build rust: command execution failed

[MacPorts]

#62252: rust @1.47.0_0: Failed to build rust: command execution failed
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  Reporter:  macdeport  |      Owner:  g5pw
      Type:  defect     |     Status:  closed
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.6.4
Resolution:  fixed      |   Keywords:
      Port:  rust       |
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Comment (by kencu):

 Yes, perhaps -- the sysconf fixes in legacysupport are robust enough to be
 used instead of the ones in libSystem on these rare occasions I think.

 In clang-devel I will use our sysconf blocker to prevent it being found to
 fix this...I can't think of a way to do a current system test in
 headers...just a current SDK test, which is not sufficiently good to use.

 Runtime system branching is tricky, esp when a weak linked symbol won't do
 it as the symbol exists, you just want to override it.

 The new {{{__available() }}} builtins would be just wonderful for this, if
 the old system compilers would compile them, but they won't

 Actually, probably I could pull that from clang-rt. That is where I last
 got to in the thought process about this.

-- 
Ticket URL: <https://trac.macports.org/ticket/62252#comment:21>
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