[MacPorts] #66222: oneTBB @2021.7.0 fails to build on 10.6.8 for x86_64

[MacPorts]

#66222: oneTBB @2021.7.0 fails to build on 10.6.8 for x86_64
---------------------------+---------------------------------
  Reporter:  barracuda156  |      Owner:  mohd-akram
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.0
Resolution:                |   Keywords:  snowleopard, x86_64
      Port:                |
---------------------------+---------------------------------

Comment (by barracuda156):

 So above is the build failure with Clang, here is with GCC:

 {{{
 :info:build {standard input}:82:no such instruction: `xbegin L18'
 :info:build {standard input}:89:no such instruction: `xabort $255'
 :info:build {standard input}:185:no such instruction: `xend'
 :info:build make[2]: *** [src/tbb/CMakeFiles/tbb.dir/rtm_mutex.cpp.o]
 Error 1
 :info:build make[2]: *** Waiting for unfinished jobs....
 :info:build {standard input}:150:no such instruction: `xend'
 :info:build {standard input}:220:no such instruction: `xbegin L53'
 :info:build {standard input}:227:no such instruction: `xabort $255'
 :info:build {standard input}:314:no such instruction: `xbegin L78'
 :info:build {standard input}:321:no such instruction: `xabort $255'
 :info:build make[2]: *** [src/tbb/CMakeFiles/tbb.dir/rtm_rw_mutex.cpp.o]
 Error 1
 }}}

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Ticket URL: <https://trac.macports.org/ticket/66222#comment:1>
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