Undefined reference to ioremap

Changho Chung · 05-24-2013, 02:40 AM

Hello, all

Now I am trying to access PCI use memory mapping method - ioremap(), inb() and outb().
But, error 'Undefined reference to ioremap' occurs during compile/link.
My development environment is user, not kernel. Is it impossible use kernel function like ioremap() under user environment?

Joseph

shihhuangti · 05-25-2013, 02:39 AM

Quote:

Originally Posted by Changho Chung

Hello, all

Now I am trying to access PCI use memory mapping method - ioremap(), inb() and outb().
But, error 'Undefined reference to ioremap' occurs during compile/link.
My development environment is user, not kernel. Is it impossible use kernel function like ioremap() under user environment?

Joseph

maybe on your arch, the function ioremap is a mcaro.
LQ Newbie

Registered: May 2013
Posts: 1

Rep:
search other kernel code which use ioremap. foucus the header file which other kernel code includes.

Changho Chung · 05-25-2013, 11:31 AM

Quote:

Originally Posted by shihhuangti

maybe on your arch, the function ioremap is a mcaro.
LQ Newbie

Registered: May 2013
Posts: 1

Rep:
search other kernel code which use ioremap. foucus the header file which other kernel code includes.

Thank you very much !!
I found io.h that include ioremap(), and compile is OK ! But cannot link with same error "undefined reference to ioremap"
I think that need to add Library that has ioremap code. Could you help me some more ??

Joseph Chung

bloodstreetboy · 05-27-2013, 12:23 AM

Have you checked here?
http://www.ioremap.net