[MacPorts] #63031: mpich-default @3.4.1_3: seems to be disabled on Leopard -- but installs easily

[MacPorts]

#63031: mpich-default @3.4.1_3: seems to be disabled on Leopard -- but installs
easily
--------------------+--------------------------
 Reporter:  kencu   |      Owner:  mascguy
     Type:  defect  |     Status:  assigned
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  mpich-defaul
--------------------+--------------------------
 I was getting around to upgrading the ports on some of my older systems,
 and on my main Leopard workhorse, mpich-default would not upgrade.

 It said it was not supported on Leopard, which came as a surprise to me,
 as it installed without any trouble at all a few weeks ago, and the
 version has not changed.

 Things in the mpich-* world have become rather impressively more
 complicated since the last time I looked, with the port trying to do a lot
 of figuring out what compilers do and don't work on which systems. That is
 such a moving target it will be hard to keep that logic current. For
 example, it says that gcc9 won't build on 10.7, or that clang-11 won't
 build on 10.6, but they do, AFAIK.

 Anyway, after a fair amount of trying to figure out what is going on. I
 (think I) found the switch to flip that was disabing mpich-default on
 Leopard, and with this little patch:

 {{{
 $ diff -u Portfile `port file mpich-default`
 --- Portfile    2021-06-05 19:31:01.000000000 -0700
 +++
 /opt/local/var/macports/sources/rsync.macports.org/macports/release/tarballs/ports/science/mpich/Portfile
 2021-06-05 19:12:23.000000000 -0700
 @@ -82,7 +82,7 @@
  dict set clist gcc7 {macports-gcc-7}

  # Only enable default (gcc), and Xcode clang, for MacOS 10.7 and later
 -if { ${os.major} >= 11 } {
 +if { ${os.major} >= 1 } {
      dict set clist default {}
      dict set clist clang   {clang}
  } else {
 }}}

 all was well in the world once again. mpich-default builds through with
 the lowly, 15 year old {{{/usr/bin/gcc-4.2}}} on Leopard, so it's compiler
 requirements would appear to be quite modest, in the end.

 {{{
 $ port -v installed mpich-default
 The following ports are currently installed:
   mpich-default @3.4.1_1+gcc7 requested_variants='+gcc7' platform='darwin
 9' archs='i386' date='2021-03-17T14:22:49-0700'
   mpich-default @3.4.2_0+gcc7 (active) requested_variants=''
 platform='darwin 9' archs='i386' date='2021-06-05T19:28:20-0700'
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/63031>
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