From: afiskon@devzen.ru (Aleksander Alekseev)
To: kernelnewbies@lists.kernelnewbies.org
Subject: How to compile Linux kernel with -O0 flag
Date: Sat, 13 Aug 2016 21:56:05 +0300 [thread overview]
Message-ID: <20160813215605.1749468e@e733> (raw)
In-Reply-To: <20160813183534.GA22784@kroah.com>
> The kernel will not run with -O0, sorry, just live with the build
> optimization levels that is currently used and you should be fine.
Oh, I see. Fortunately I'm not afraid of assembler :) Thanks.
Just out of curiosity - is there a technical reason why -O0 couldn't
be used in Linux kernel? I don't know, spinlocks would not work in this
case because it's how GCC was written or something. Or just nobody
compiles and tests kernel like this so it most likely would not work?
> But why do you want to use a debugger on the kernel? That's not a
> normal task unless you are bringing up a new hardware platform.
It's just something I always do when I learn new things. Trying to
figure out how to debug something in this new environment. No real task
so far.
--
Best regards,
Aleksander Alekseev
next prev parent reply other threads:[~2016-08-13 18:56 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-13 18:15 How to compile Linux kernel with -O0 flag Aleksander Alekseev
2016-08-13 18:35 ` Greg KH
2016-08-13 18:56 ` Aleksander Alekseev [this message]
2016-08-13 19:12 ` Greg KH
2016-08-13 19:15 ` Mike Krinkin
2016-08-14 11:11 ` Hao Lee
2016-08-14 11:31 ` Greg KH
2016-08-14 12:05 ` Hao Lee
2016-08-14 14:20 ` Yann Droneaud
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