[MacPorts] #65153: nss fails to build for x86_64 on 10.6.8 when forcing the build to use gcc11 instead of the default clang compiler: no such instruction: `pclmulqdq $16, %xmm2, %xmm0'

[MacPorts]

#65153: nss fails to build for x86_64 on 10.6.8 when forcing the build to use gcc11
instead of the default clang compiler: no such instruction: `pclmulqdq $16,
%xmm2,%xmm0'
-------------------------+-------------------------------------------------
  Reporter:              |      Owner:  (none)
  barracuda156           |
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.7.2
Resolution:              |   Keywords:  x86_64, snowleopard,
      Port:  nss         |  nonstandard_build
-------------------------+-------------------------------------------------

Comment (by barracuda156):

 Replying to [comment:7 kencu]:

 By the way, can't we use `nasm` for cases where `as` fails (on `x86_64`)?
 I have seen some ports use it, but unsure about overall compatibility.

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Ticket URL: <https://trac.macports.org/ticket/65153#comment:11>
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