warnings during compiling modules

dzt · 10-16-2003, 03:39 AM

using gcc while compiling modules i am getting

errors such as;

concentration of string literals with _FUNCTION_ is depreciated

setup_string is defined but no used

warning : implicit declaration of ...

warning : duplicate const...

what are these messages related to?
what might be causing them?

thanks

Hko · 10-16-2003, 11:50 AM

Quote:

setup_string is defined but no used

A variable was declared, but used nowhere, so it can be removed from the code.

Quote:

warning : implicit declaration of ...

Some header file was not #included for the function mentioned.

Quote:

warning : duplicate const...

A constant was defined again.

Some code clean-up may be desireable, but as they are warnings, they are not harmful if the coder was aware of what he/she is doing.

dzt · 10-16-2003, 12:34 PM

explains quite well.. any idea about the 1st one ?

Hko · 10-16-2003, 05:49 PM

No idea...
Have you looked up the line in the code the message probably mentions?

dzt · 10-17-2003, 06:01 PM

well well...

for the past 4 days i have been spending my hours for a slick configuration of the 2.4.22 kernel and compiled a couple kernels vith various configs...

but as far as the modules I am getting some errors with depmod

I am just excluding the unnecesssary support modules and am not installing them at all...

but still getting unresolved errors..
should I just include all kinds of support for the hell of it and various stuff as modules ? or what should I do ?

Hko · 10-18-2003, 04:34 AM

Quote:

I am just excluding the unnecesssary support modules and am not installing them at all...

Sounds like there are some options/modules that are included and need other options/modules that are not included. I would go through all the selected options, read help about them, try to understand what they are for, and what other options they might need.

2.4.22 compile fine on my system, but there is a bug in the sg.o module (SCSI generic, needed for IDE CD writers), that is fixed somewhere in the 2.4.23-pre.. series. So if you have a IDE CD-writer, I would not use 2.4.22.

dzt · 10-18-2003, 06:12 AM

hmm can that be the reason causing the kmod scsi_hostadapter load fail by any chance?

Hko · 10-18-2003, 06:33 AM

Don't know, maybe. I don't have scsi_hostadapter in my /etc/modules.conf, so I didn't have that problem with 2.4.22. It compiled fine; no unresolved symbols. But cdrecord -scanbus failed.

On my (Debian testing/sarge with 2.4.23-pre7:

$ fgrep scsi /etc/modules.conf
pre-install ide-scsi modprobe ide-cd
pre-install sg modprobe ide-scsi
pre-install sr_mod modprobe ide-scsi

dzt · 10-18-2003, 02:12 PM

i dont have an entry about scsi_hostadapter in my modules.conf file... that prolly doesnt mean that it is compiled in the kernel right? how Can i get rid of that then?

Hko · 10-19-2003, 08:24 AM

I don't have scsi_hostadapter in /etc/modules.conf either.
According to /usr/src/linux-2.4.23-pre7/Documentation/modules.txt it can be used to specify an alias in /etc/modules.conf for what driver/module you want kmod to load, when the kernel needs SCSI. Say if you have a SCSI-card type "aha1542", you would specify this in /etc/modules.conf:

alias scsi_hostadapter aha1542

But, I think, it is not needed for IDE CD-writers. At least mine works without it.