[MacPorts] #69892: python312 fails to build on G3: Python: incompatible cpu-subtype

[MacPorts]

#69892: python312 fails to build on G3: Python: incompatible cpu-subtype
---------------------------+----------------------
  Reporter:  barracuda156  |      Owner:  jmroot
      Type:  defect        |     Status:  assigned
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.9.3
Resolution:                |   Keywords:  tiger
      Port:  python312     |
---------------------------+----------------------

Comment (by miles-martin-66):

 I'm glad I found this ticket.  I just ran into this issue and tried your
 workaround on my aging iMac G3 PPC, 1GB Ram and can confirm that it works
 and that python312 builds and installs.

 1)

 {{{
 sudo port clean python312
 vi `port file python312`
 }}}

 2) Added the suggested code block just below the check for "darwin" so
 that the port file looks like this:

 {{{
 if {${os.platform} eq "darwin" && ${os.major} <= 10} {
     # work around no copyfile and/or pthread_threadid_np on older systems
     patchfiles-append  patch-no-copyfile-on-Tiger.diff \
                        patch-threadid-older-systems.diff
 }

 if {${configure.build_arch} in "ppc ppc64"} {
     # https://trac.macports.org/ticket/66483
     configure.ldflags-append -Wl,-read_only_relocs,suppress
     # G3 builds fail without this flag, as converting a static library
     # to dynamic using -all_load inadvertently sets the arch to ppc7400
     configure.ldflags-append -Wl,-force_cpusubtype_ALL
 }
 }}}


 One observation,  I see these warnings when building and installing both
 python311 and python311.

 Warning: Configuration logfiles contain indications of -Wimplicit-
 function-declaration; check that features were not accidentally disabled:
   lchflags: found in Python-3.12.3/config.log
   dbm_open: found in Python-3.12.3/config.log
   getrandom: found in Python-3.12.3/config.log
   le64toh: found in Python-3.12.3/config.log

-- 
Ticket URL: <https://trac.macports.org/ticket/69892#comment:22>
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