[ale] Rebuild CentOS 7.X

[Chris Fowler]

> From: "Jim Kinney" <jkinney at jimkinney.us>
> To: "Atlanta Linux Enthusiasts" <ale at ale.org>
> Sent: Wednesday, December 2, 2015 6:42:07 PM
> Subject: Re: [ale] Rebuild CentOS 7.X

> I thought real i386 was dropped from the kernel about 5 years ago. The kernel
> goes back as far as i586 instructions (first gen pentium).

Correct. 

CMOV can be compiled in glibc. This makes it incompatible for i586 even though the kernel supports it. Run a program that uses it and you'll get 'Illegal Instruction" I've been down this road a few times with the different pieces of hardware we've used. The system I'm phasing out that does not support CMOV is a RISC that loves to pretend he is x86. RDC R3308. 
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