[MacPorts] #66639: ruby31 3.1.3: fails to build on OS X 10.8 and 10.9

[MacPorts]

#66639: ruby31 3.1.3: fails to build on OS X 10.8 and 10.9
-------------------------------------+--------------------
 Reporter:  erikbs                   |      Owner:  (none)
     Type:  defect                   |     Status:  new
 Priority:  Normal                   |  Milestone:
Component:  ports                    |    Version:
 Keywords:  mountainlion, mavericks  |       Port:  ruby31
-------------------------------------+--------------------
 The build configures as usual, but fails during the build stage. Log
 extract:
 {{{
 ...
 :info:build make[1]: Leaving directory
 `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_ruby31/ruby31/work/ruby-3.1.3'
 :info:build generating makefile exts.mk
 :info:build compiling ./enc/trans/emoji_sjis_kddi.c
 :info:build compiling ./enc/iso_8859_2.c
 :info:build compiling ./enc/iso_8859_3.c
 :info:build exts.mk updated
 :info:build make[1]: Entering directory
 `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_ruby31/ruby31/work/ruby-3.1.3'
 :info:build make[2]: Entering directory
 `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_ruby31/ruby31/work/ruby-3.1.3/ext/-test-/RUBY_ALIGNOF'
 :info:build make[2]: *** No rule to make target `all'.  Stop.
 :info:build make[2]: Leaving directory
 `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_ruby31/ruby31/work/ruby-3.1.3/ext/-test-/RUBY_ALIGNOF'
 :info:build make[1]: *** [ext/-test-/RUBY_ALIGNOF/all] Error 2
 }}}

 The error is not that `ext/-test-/RUBY_ALIGNOF/Makefile` does not contain
 a target `all`, but that the Makefile in this directory does not exist at
 all. According to a comment on an earlier ticket from a few months ago
 (https://trac.macports.org/ticket/65290#comment:1), the generation of this
 Makefile overwrites the Makefile in the build root directory, and that
 seems to be the case on my system as well.

 I have tried compiling with Clang 14, Clang 15 and GCC 11 – the result is
 always the same. I also tried using `gmake` instead of `make` and to build
 with `use_autoreconf yes` in the Portfile (required an additional patch
 akin to `patch-configure.diff` for `configure.ac`). Nothing helped.

 If I build Ruby from source outside of Macports (same source tgz), I do
 not encounter this issue. I noticed that even if I pass all the Portfile
 configure options, the generated Makefiles are quite different (I will
 attach both files).

-- 
Ticket URL: <https://trac.macports.org/ticket/66639>
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