[MacPorts] #64262: libuv fails to build for ppc64

[MacPorts]

#64262: libuv fails to build for ppc64
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  Reporter:  barracuda156  |      Owner:  michaelld
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.2
Resolution:                |   Keywords:  powerpc, leopard, ppc64
      Port:  libuv         |
---------------------------+-------------------------------------

Comment (by barracuda156):

 Replying to [comment:4 michaelld]:
 > Can anyone with a PPC/PPC64 try this PR for libuv 1.44.0?

 Okay, I have found a cause of the problem myself: this instruction is
 defined unconditionally, but is invalid in Darwin ABI:
 ```
 #elif defined(__powerpc64__) || defined(__ppc64__) || defined(__PPC64__)
   __asm__ __volatile__ ("or 1,1,1; or 2,2,2" ::: "memory");
 #endif
 ```
 As a quick fix, this helps:
 ```
 #elif !defined(__APPLE_) && (defined(__powerpc64__) || defined(__ppc64__)
 || defined(__PPC64__))
   __asm__ __volatile__ ("or 1,1,1; or 2,2,2" ::: "memory");
 #endif
 ```

 However if anyone could advise me on Darwin PPC assembler, we can fix it
 properly (and improve for ppc32).

-- 
Ticket URL: <https://trac.macports.org/ticket/64262#comment:14>
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