[MacPorts] #65061: gcc: --build=${build_arch}- leads to incorrect names in case of PPC

[MacPorts]

#65061: gcc: --build=${build_arch}- leads to incorrect names in case of PPC
-------------------------------------------+-------------------------------
 Reporter:  barracuda156                   |      Owner:  catap
     Type:  defect                         |     Status:  assigned
 Priority:  Normal                         |  Milestone:
Component:  ports                          |    Version:  2.7.2
 Keywords:  powerpc, leopard, snowleopard  |       Port:  gcc7, gcc10,
                                           |  gcc11
-------------------------------------------+-------------------------------
 I believe this is wrong:

 {{{
 platform darwin {
     configure.pre_args-append --build=${build_arch}-apple-
 darwin${os.major}
 }
 }}}

 On PowerPC this results in names of the form {{{ppc-apple-darwin}}}, while
 it should be {{{powerpc-apple-darwin}}}. (Now, compiler still works, so I
 do not know if it makes difference in practical terms.)

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Ticket URL: <https://trac.macports.org/ticket/65061>
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