[E3-hacking] Compiling Apps

David Given dg at cowlark.com
Wed Oct 4 10:45:56 BST 2006

Jasmine Strong wrote:
> Were you running gcc from flash, or from disc?  If it's running from
> flash, I would
> expect that to be faster than (at least USB1) disc.
> Compiling with -O3 -fomit-stack-frame also helps ARM a lot more than you
> might expect,
> since the optimizer can make serious gains there-


Back then there was no flash driver, so everything was coming off the disk;
and given that I was really doing it as a stunt, there was no special
configuration done. If I ever figure out OpenEmbedded I might play with the
compilation options --- that optimisation trick definitely sounds worth
trying. (It may also be worth experimenting with using Thumb code. It's
technically slower, but the higher code density might improve overall
performance by reducing I/O.)

It's a shame building a Linux distro from scratch is such a pain... I *knew*
we should have gone for BSD! [1]

(The new EABI stuff looks interesting, too.)

[1] That was a joke.

+- David Given --McQ-+ "Wizards get cranky, / Dark days dawn, / Riders
|  dg at cowlark.com    | smell manky, / The road goes on. / Omens are
| (dg at tao-group.com) | lowering, / Elves go West; / The Shire needs
+- www.cowlark.com --+ scouring, / You may as well quest." - John M. Ford

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