I examined the Makefiles for RTLinux 3.0 and 2.2 somewhat closely after having
problems with unresolved symbols in the modules built by RTLinux 3.0, and found out
that in 2.2, the RTLINUX variable actually points to the linux source tree, but in
3.0, the RTLINUX variable points to rtlinux itself. Thus, the makefile never finds
CONFIG_MODVERSIONS to be true in the following statements:
ifdef CONFIG_MODVERSIONS
CFLAGS += -DMODVERSIONS -include $(RTLINUX)/include/linux/modversions.h
endif
This means that you can add CONFIG_MODVERSIONS to your .config file in your rtlinux
source tree, or maybe even do the following:
include linux/.config
in the makefile. I wouldn't do that, a name clash could occur... unlikely, but still
possible.
The reason for me currently not submitting a patch for this is that I previosly
accidentally got the modules to work with kernel 2.4.0 - maybe I just forgot to
activate module versioning, maybe I should examine the source code more closely! :-)
Comments? What is the best solution?
/Jonas
______________________________________________________________________
Jonas Persson E-mail: [EMAIL PROTECTED]
Project Manager, M.Sc C.Sc&E http://www.comsys.se/
Comsys AB (publ) Phone: +46-(0)46-286 3051
Forskningsbyn IDEON Fax: +46-(0)46-286 3505
S-223 70 Lund, Sweden
----- Original Message -----
From: "Gerard Vermeulen" <[EMAIL PROTECTED]>
To: "Jonas Persson" <[EMAIL PROTECTED]>
Cc: "Comedi" <[EMAIL PROTECTED]>
Sent: Friday, March 16, 2001 12:00 PM
Subject: Re: Comedi 0.7.57 and RTLinux
> Jonas Persson wrote:
> >
> > INSTALL.RTLinux file states that I need to use RTLinux 2.1 in order for this to
>work
> >
> No, RTLinux-2.2 and RTLinux-3.0 should work. Doc is outdated.
>
> I noticed a problem compiling RTLinux-3.0 with the prepatched-2.2.18 kernel:
> somehow the RTLinux 'make config' does not detect that I have module versioning
>enabled
> (this worked in 3.0pre9 and pre10).
>
> I have an build-rtl-3.0.sh install script and to build and install the RTLinux
> modules, I added something like:
> make menuconfig
> make dep
> # FIXME:
> perl -pi.modules -e "s|-D_LOOSE_KERNEL_NAMES|-D_LOOSE_KERNEL_NAMES -DMODVERSION\
> S -include /usr/src/linux/include/linux/modversions.h|g" rtl.mk
> make
> make devices
>
> (assuming that the kernel source is in /usr/src/linux/)
>
> Hope this helps -- Gerard
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