[MacPorts] #67572: gperftools: arm: cmake arch check broken, causing build failures

[MacPorts]

#67572: gperftools: arm: cmake arch check broken, causing build failures
-------------------------+----------------------
  Reporter:  mascguy     |      Owner:  mascguy
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:              |   Keywords:  arm
      Port:  gperftools  |
-------------------------+----------------------

Comment (by mascguy):

 Replying to [comment:6 mascguy]:
 > We'll soon know whether the latest fix - avoiding use of `libunwind` for
 ARM, universal or not - fixes the issue.
 >
 > If not, I might need some assistance from a kind soul with an ARM Mac,
 as I have no way to test such changes locally.

 Unfortunately removing `libunwind` from the mix doesn't help ARM.

 Comparing the project's arch check logic, it looks like it's identical
 between autotools and cmake: Essentially it's just compiling the following
 C file:

 {{{
 int
 main (void)
 {
 return __arm__
   ;
   return 0;
 }
 }}}

 So I'm stumped, unless there's a difference in the various C/CXX flags
 passed during compilation of that file. (Which is certainly possible, with
 cmake now in the mix.)

 But if anyone with an ARM machine is interested in assisting, that would
 be great!

-- 
Ticket URL: <https://trac.macports.org/ticket/67572#comment:8>
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