[MacPorts] #65698: libgcc7 depends on later libgcc8, libgcc9, libgcc10

[MacPorts]

#65698: libgcc7 depends on later libgcc8, libgcc9, libgcc10
--------------------------+---------------------
 Reporter:  barracuda156  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.7.2
 Keywords:                |       Port:  libgcc7
--------------------------+---------------------
 How does this even happen? Why for gcc7/libgcc7 all later libgcc are
 required now, which likely won’t even build for PPC? (gcc10 onwards do
 build for PPC, but gcc8/gcc9 may not – earlier they were confirmed to
 fail.)

 {{{
 10:~ svacchanda$ port deps libgcc7
 Full Name: libgcc7 @7.5.0_1
 Extract Dependencies: xz
 Build Dependencies:   cctools, gmp, isl, ld64, zlib, libiconv, libmpc,
 mpfr
 Library Dependencies:
 Runtime Dependencies: libgcc8
 10:~ svacchanda$ port deps libgcc8
 Full Name: libgcc8 @8.5.0_1
 Extract Dependencies: xz
 Build Dependencies:   gcc12
 Library Dependencies: libgcc
 Runtime Dependencies: libgcc9
 10:~ svacchanda$ port deps libgcc9
 Full Name: libgcc9 @9.5.0_2
 Extract Dependencies: xz
 Build Dependencies:   cctools, gmp, isl, ld64, libiconv, libmpc, mpfr,
 zlib,
                       gcc12
 Library Dependencies: libgcc
 Runtime Dependencies: libgcc10
 }}}

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Ticket URL: <https://trac.macports.org/ticket/65698>
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