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[ts-7000] Re: cross compiled EABI binary gives Illegal instruction

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Subject: [ts-7000] Re: cross compiled EABI binary gives Illegal instruction
From: "charliem_1216" <>
Date: Mon, 17 Nov 2008 14:08:10 -0000
--- In  "gajans.garage" <> wrote:
>
> Hi Charlie,
> 
> It worked. I added -march=armv4t -static options and cross compiled.
> Thank you.
> 
> I have two doubts:
> 1. If I cross compile everything with -static option do I need to care
> about my root-fs which is old-ABI. 

As long as your kernel is compiled to run EABI, you should be OK.  But
that means your kernel is running Old-ABI in compatibility mode which
is a small performance hit.  It is a very small hit compared to the
huge gain from using EABI

> 2. Can I use my EABI binaries to call some old-ABI binaries such as
> the lincan(TS CAN1) binaries.

If you mean call as in exec'ing, then yes.  If you mean call such as
link with or dynamic load, then no.  Best performance & smallest code
would be with: EABI kernel w/o OABI compatibility & EABI rootfs.

> 
> forgive me for these basic questions. 

No problem.  There is good reading about EABI and transitioning issues
around it at:
http://wiki.debian.org/ArmEabiHowto

Regards, ......... Charlie

> 
> Gajan 
> 
> 


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