[MacPorts] #64577: advice on macports-gcc-10 errors on 10.5.8: gcc works but g++ fails: library not found for -lgcc_s.1.1

[MacPorts]

#64577: advice on macports-gcc-10 errors on 10.5.8: gcc works but g++ fails:
library not found for -lgcc_s.1.1
---------------------------+-------------------------------------
  Reporter:  barracuda156  |      Owner:  (none)
      Type:  request       |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:                |   Keywords:  powerpc, Leopard, ppc64
      Port:  gcc10         |
---------------------------+-------------------------------------

Comment (by barracuda156):

 So for whatever reason `libgcc_s.1.1.dylib` and `libgfortran.5.dylib` did
 not build and not present in `/opt/local/lib/libgcc`, while
 `/opt/local/lib/gcc10` has symlinks pointing to nowhere.

 After I manually copied these dylibs from gcc10 built outside Macports,
 Macports `g++-mp-10` started working:

 {{{
 36-47:~ svacchanda$ /opt/local/bin/g++-mp-10 /Users/svacchanda/Dev/hw.cpp
 -o hello
 36-47:~ svacchanda$ /Users/svacchanda/hello
 Hello world!
 }}}

 Of course I still want to figure out why dylibs didn't build in the first
 place.

-- 
Ticket URL: <https://trac.macports.org/ticket/64577#comment:7>
MacPorts <https://www.macports.org/>
Ports system for macOS