From: Eric Hodel <drbrain@...7.net>
Date: 2007-10-15T05:25:58+09:00
Subject: Re: Bug: Numeric#divmod calculates wrongly

On Oct 14, 2007, at 03:44 , M. Edward (Ed) Borasky wrote:

> And Eric has it broken on PowerPC Macs for both Ruby 1.8.6 and Ruby  
> 1.9.0
>
> Eric, what compiler made the Ruby interpreters on your PowerPC?
>
> And everybody -- recompile ruby-1.8.6-p111 and see whether it works  
> or not. I say it's a compiler problem at this point -- maybe over- 
> aggressive floating-point optimization?? I doubt if the Ruby source  
> is broken.

$ gcc -v
[...]
gcc version 4.0.1 (Apple Computer, Inc. build 5367)
$ ruby19 -v -rrbconfig -e 'p Config::CONFIG["CFLAGS"]'
ruby 1.9.0 (2007-10-13 patchlevel 0) [powerpc-darwin8.10.0]
"-g -O2 -pipe -fno-common"
$ ruby18 -v -rrbconfig -e 'p Config::CONFIG["CFLAGS"]'
ruby 1.8.6 (2007-09-23 patchlevel 5000) [powerpc-darwin8.10.0]
"-g -O2 -fno-schedule-insns2 -pipe -fno-common"

-fno-schedule-insns2 is to work around a GCC bug.

--
Poor workers blame their tools. Good workers build better tools. The
best workers get their tools to do the work for them. -- Syndicate Wars