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Re: solaris build problem with Sun compilers

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: stange(at)rentec(dot)com, pgsql-ports(at)postgresql(dot)org
Subject: Re: solaris build problem with Sun compilers
Date: 2006-05-12 23:37:20
Message-ID: 200605122337.k4CNbKh02707@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-ports
Tom Lane wrote:
> Alan Stange <stange(at)rentec(dot)com> writes:
> > Check out the comment and implementation for cas32() in this .il 
> > template file for libc from OpenSolaris:
> 
> > http://cvs.opensolaris.org/source/xref/on/usr/src/lib/libc/sparc/threads/sparc.il
> 
> If you mean
> 
>           * When compiling with -xarch=v8, the compiler refuses to
>           * accept the 'cas' instruction, so we encode it in hex below.
> 
> I can't say that that impresses me.  It still will fail on v8 chips no?
> What's the point of fooling the compiler if you can't fool the hardware?

Wow, that is _insane_ --- you can't code the ASM, so you specify the
instructions in _hex_.  However, they must like cas more than ldstub or
they wouldn't have gone through that much work to use cas.

I am thinking we revert to ldstub and add a comment that we are not
using cas() because of sparc v8.

I just checked gcc on Solaris 2.9 (Solaris 9?), and there is no
specification of the type of sparc processor:

	 /usr/local/lib/gcc-lib/sparc-sun-solaris2.9/3.3.2/cc1 -quiet -v
	-D__GNUC__=3 -D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=2 -Dsparc
	-D__sparc__ -D__sparc -D__GCC_NEW_VARARGS__ -Acpu=sparc -Amachine=sparc
	x.c -quiet -dumpbase x.c -auxbase x -version -o /var/tmp//ccBSywG7.s

-- 
  Bruce Momjian   http://candle.pha.pa.us
  EnterpriseDB    http://www.enterprisedb.com

  + If your life is a hard drive, Christ can be your backup. +

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