From: Heesob Park <phasis@...>
Date: 2010-09-01T22:27:01+09:00
Subject: Re: Ruby 1.8.6 : 0.5 == 5.0 ???

Hi,

2010/9/1 Thomas Sevestre <thomas.sevestre@tcare.fr>:
> Hello,
>
> I have a strange problem on one of my servers.
> I just installed ruby 1.8.6 from source :
>
> /tmp/ruby-1.8.6-p383$uname -a
> Linux prod2-ctxctrl 2.6.32-24-generic-pae #39-Ubuntu SMP Wed Jul 28 07:39:26
> UTC 2010 i686 GNU/Linux
>
> /tmp/ruby-1.8.6-p383$ruby --version
> ruby 1.8.6 (2009-08-04 patchlevel 383) [i686-linux]
>
> Something is broken with floats, here are a few tests :
>
> /tmp/ruby-1.8.6-p383$ruby -e "puts 0.5"
> 5.0
> /tmp/ruby-1.8.6-p383$ruby -e "puts 0.05"
> 5.0
> /tmp/ruby-1.8.6-p383$ruby -e "puts 0.5 == 5.0"
> true
> /tmp/ruby-1.8.6-p383$ruby -e "puts 1.0 / 2"
> 0.5
>
> Do you have any idea of what is going on?
>
This is a gcc version issue with gcc 4.4.1.

Refer to http://www.ruby-forum.com/topic/199860

Regards,
Park Heesob