Archaeology question : what is the last release to support XYZ ?

[Dennis Clarke]

     Digging around in the various pages and manuals on gcc.gnu.org has
not shed light on what release supports what OS/arch. The real question
is what was the last release to support AIX ver x.y on IBM RS/6000 or
perhaps some variation of HP/UX on an old SuperDome? I can not find
anything anywhere that says "this should work" as well as "this will not
work" or even "good luck".

     Looking at Host/Target specific installation notes for GCC :

         https://gcc.gnu.org/install/specific.html#older

     There I see :

         Starting with GCC 3.1, each release has a list of “obsoleted”
         systems. Support for these systems is still present in that
         release, but configure will fail unless the --enable-obsolete
         option is given. Unless a maintainer steps forward, support for
         these systems will be removed from the next release of GCC.

     Really?

     Where is that list?

     If anyone knows where inside the source tree one would find such a
list of "supported" and/or "obsoleted” systems that would be so very
helpful to those of us that drag around museum pieces.[1]

-- 
--
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken

[1] I may be a museum piece also but not worth the price of admission