[MacPorts] #64694: gcc/libgcc: update older systems prior to 10.6 to a newer gcc version?

[MacPorts]

#64694: gcc/libgcc: update older systems prior to 10.6 to a newer gcc version?
----------------------------+---------------------------
  Reporter:  barracuda156   |      Owner:  (none)
      Type:  request        |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.7.1
Resolution:                 |   Keywords:  leopard tiger
      Port:  libgcc, gcc10  |
----------------------------+---------------------------

Comment (by barracuda156):

 Replying to [comment:4 kencu]:
 > BTW -- gcc10 and gcc10-bootstrap on 10.6 PPC will build but be broken
 just like all the gcc versions unless you went through that special
 patchset I came up with for gcc7 and tweak it up for gcc10.

 Do I get it correctly that moving to libgcc11 should be instead less
 painful, since it is set as default for 10.6 normally anyway?


 {{{
 36-72% port -v installed libgcc11
 The following ports are currently installed:
   libgcc11 @11.2.0_3 (active) requested_variants='' platform='darwin 10'
 archs='ppc' date='2022-03-09T07:19:42+0800'
 36-72% port -v installed gcc11
 The following ports are currently installed:
   gcc11 @11.2.0_3 (active) requested_variants='' platform='darwin 10'
 archs='ppc' date='2022-03-09T01:38:58+0800'
 36-72% port -v installed libgcc
 The following ports are currently installed:
   libgcc @5.0_0 (active) requested_variants='' platform='darwin 10'
 archs='ppc' date='2022-03-09T07:26:11+0800'

 }}}

 P. S. After building libgcc11 I had to deactivate libgcc7, and trying
 activate it back results in:

 {{{

 36-72% sudo port activate libgcc7
 Warning: configured user/group macports does not exist, will build as root
 --->  Computing dependencies for libgcc7
 --->  Activating libgcc7 @7.5.0_1
 Error: Failed to activate libgcc7: Image error:
 /opt/local/include/gcc/c++/algorithm is being used by the active libgcc11
 port.  Please deactivate this port first, or use 'port -f activate
 libgcc7' to force the activation.
 Error: See
 /opt/local/var/macports/logs/_opt_local_var_macports_registry_portfiles_libgcc7-7.5.0_1_5dd4ca996c44932720b515e198a68fea5a0470b6cb5a83ba7ca31d6877e2d1b1-16766/libgcc7/main.log
 for details.
 Warning: Failed to execute portfile from registry for libgcc7 @7.5.0_1
 --->  Activating libgcc7 @7.5.0_1
 Error: port activate failed: Image error:
 /opt/local/include/gcc/c++/algorithm is being used by the active libgcc11
 port.  Please deactivate this port first, or use 'port -f activate
 libgcc7' to force the activation.
 }}}

 Are they inherently incompatible or I should just change a setting
 somewhere? I have rebuilt libgcc port.

-- 
Ticket URL: <https://trac.macports.org/ticket/64694#comment:6>
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