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Re: Deprecate 32-bits HP-PA for GCC 4.8?
- From: Jeff Law <law at redhat dot com>
- To: Steven Bosscher <stevenb dot gcc at gmail dot com>
- Cc: GCC Mailing List <gcc at gcc dot gnu dot org>, "Joseph S. Myers" <joseph at codesourcery dot com>, John David Anglin <danglin at gcc dot gnu dot org>
- Date: Mon, 07 May 2012 11:42:51 -0600
- Subject: Re: Deprecate 32-bits HP-PA for GCC 4.8?
- References: <CABu31nPBjtp4h+LpVTDkLjPE=9dm3auxCyk6LjHTaCQADxB3xg@mail.gmail.com>
On 05/07/2012 11:33 AM, Steven Bosscher wrote:
Hello,
GCC is well into stage 1 for GCC 4.8, but I haven't seen any proposals
for targets to be deprecated. I have one I would like to put on the
list, so here's something to start a discussion with:
Deprecate all support for 32-bits HP-PA. This includes HP-UX10, and
PA-7000 and older.
No objections from me. PA1.x machines are ancient. However, before
making the decision, I think making sure your facts are correct would be
wise.
3. The PA-7000 series only run HP-UX 10 or earlier, so support for
HP-7000 and older is pointless without HP-UX10 support.
Does the PA linux port run on the older PA machines or did they restrict
themselves to PA2.0 and newer? I certainly recall them working on 32bit
ports at one time.
4. 32-bits HP-PA uses the SOM binary object format, i.e. it is a
non-ELF target (64-bits HP-PA is ELF).
Well, there was a PA ELF 32 bit target, but I suspect that code has long
since died.
Removing support for anything older than PA-8000 results in a
considerable cleanup for the PA architecture: ~3300 lines out of
~23000, estimated by cleaning all "!TARGET_64BIT" and "TARGET_PA_11"
patterns in pa.md and pa.c, and most of the cleanups to remove support
for SOM objects.
IIRC TARGET_PA_11 was implicitly on when compiling 2.0 support. Again,
worth checking since it may affect how much code you think you can clean up.
Jeff