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Re: BUG #4190: sparc64 test suite fails

From: Dennis Gilmore <dennis(at)ausil(dot)us>
To: Gregory Stark <stark(at)enterprisedb(dot)com>
Cc: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #4190: sparc64 test suite fails
Date: 2008-05-24 05:51:27
Message-ID: 200805240051.35213.dennis@ausil.us (view raw or flat)
Thread:
Lists: pgsql-bugs
The full build log is 
http://sparc.koji.fedoraproject.org/koji/getfile?taskID=56849&name=build.log

the build was using gcc-4.3  with the package as built on the rest of fedora.  
it builds ok sparc32 ppc ppc64 i386 x86_64 and ia64  but fails on sparc64.  

I will forward everything to the gcc guys in a bug report.  

Dennis

On Friday 23 May 2008, Gregory Stark wrote:
> "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
> > IMHO, what you have here is a compiler bug, or at least the gcc boys are
> > going to need to provide a damn good excuse why it's not.
>
> You don't, perhaps have any of -ffast-math or these two suboptions which
> -ffast-math enables turned on?
>
> `-funsafe-math-optimizations'
>      Allow optimizations for floating-point arithmetic that (a) assume
>      that arguments and results are valid and (b) may violate IEEE or
>      ANSI standards.  When used at link-time, it may include libraries
>      or startup files that change the default FPU control word or other
>      similar optimizations.
>
>      This option should never be turned on by any `-O' option since it
>      can result in incorrect output for programs which depend on an
>      exact implementation of IEEE or ISO rules/specifications for math
>      functions.
>
>      The default is `-fno-unsafe-math-optimizations'.
>
> `-fno-trapping-math'
>      Compile code assuming that floating-point operations cannot
>      generate user-visible traps.  These traps include division by
>      zero, overflow, underflow, inexact result and invalid operation.
>      This option implies `-fno-signaling-nans'.  Setting this option
>      may allow faster code if one relies on "non-stop" IEEE arithmetic,
>      for example.
>
>      This option should never be turned on by any `-O' option since it
>      can result in incorrect output for programs which depend on an
>      exact implementation of IEEE or ISO rules/specifications for math
>      functions.
>
>      The default is `-ftrapping-math'.


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