[linux-usb-devel] Building 2.5/2.6 under a 2.4 kernel
Hi All, I am attempting to get setup for the kernel development of a USB serial driver. I am currently running on RH-9. Please bear with me as I have tried posting to the kernel-newbies.com list but the list appears to be read-only and no HOWTO's I have looked at are relevant. I have downloaded a kernel tar-ball and extracted it under my home directory. I still have a few questions about development under this tree. Here is where I am so far: I am currently booted on 2.4.20-6smp (redhat). I downloaded the tarball: linux-2.6.0-test2.tar.bz2 and have extracted it under my home directory. After this step I was successfully able to do the following steps (with gcc version 3.2.2): . make oldconfig (left most options as default) . make bzImage then I tried: . make modules At the make modules stage I get a build failure. Below is a dump of the last screen of the failure. It was building for perhaps 20 minutes before bailing out. There were many warnings throughout the build (see below). I get similar errors if I try to build a 2.5 kernel (2.5.75). I saw a post somewhere about needing to do the following steps between the make bzImage and make modules, however it did not work: make bzImage cp .conf .conf.save make clean make mrproper make clean cp .conf.save .conf make modules BUILD_DUMP_BEGIN: drivers/char/istallion.c: In function `stli_startbrd': drivers/char/istallion.c:4231: warning: `flags' might be used uninitialized in this function drivers/char/istallion.c: In function `stli_memread': drivers/char/istallion.c:4798: warning: `flags' might be used uninitialized in this function drivers/char/istallion.c: In function `stli_memwrite': drivers/char/istallion.c:4852: warning: `flags' might be used uninitialized in this function drivers/char/istallion.c: In function `stli_portcmdstats': drivers/char/istallion.c:4970: warning: `flags' might be used uninitialized in this function CC [M] drivers/char/ip2.o drivers/char/ip2.c: In function `init_module': drivers/char/ip2.c:57: warning: `MOD_INC_USE_COUNT' is deprecated (declared at include/linux/module.h:482) drivers/char/ip2.c:67: warning: `MOD_DEC_USE_COUNT' is deprecated (declared at include/linux/module.h:494) CC [M] drivers/char/ip2main.o drivers/char/ip2main.c: In function `ip2_ioctl': drivers/char/ip2main.c:2140: warning: implicit declaration of function `save_flags' drivers/char/ip2main.c:2140: warning: implicit declaration of function `cli' drivers/char/ip2main.c:2142: warning: implicit declaration of function `restore_flags' drivers/char/ip2main.c:1976: warning: `flags' might be used uninitialized in this function drivers/char/ip2main.c: At top level: drivers/char/ip2/i2cmd.c:142: warning: `ct89' defined but not used CC [M] drivers/char/riscom8.o In file included from drivers/char/riscom8.c:51: drivers/char/riscom8.h:84: field `tqueue' has incomplete type drivers/char/riscom8.h:85: field `tqueue_hangup' has incomplete type drivers/char/riscom8.c:84: warning: type defaults to `int' in declaration of `DECLARE_TASK_QUEUE' drivers/char/riscom8.c:84: warning: parameter names (without types) in function declaration drivers/char/riscom8.c:135: confused by earlier errors, bailing out make[2]: *** [drivers/char/riscom8.o] Error 1 make[1]: *** [drivers/char] Error 2 make: *** [drivers] Error 2 [EMAIL PROTECTED] linux-2.6.0-test2]$ BUILD_DUMP_END: So it appears that the general rule is you cannot build a 2.5.x or 2.6.x kernel from a 2.4.x kernel!! I know that this cannot be the case and I must have misinterpreted something somewhere? So this is one stumbling box I have not found a HOWTO or anything to suggest that it should be more difficult than this. I have tried posting to the kernel-newbies.com list but the list appears to be read-only. Am I supposed to upgrade the binutils first? From where? Once I get past this stage I think what I am supposed to do is install the kernel in the /boot directory, add it to my GRUB configuration and boot from it. Right? This kind of doesn't make sense because all the headers in /usr/src/linux-xxx will be out of synch with the binary kernel running? Does this not matter for driver development? One website suggested a build command line for just building a driver as: gcc -o mymod.o -Wall -W -O2 -DMODULE -D__KERNEL__ -I/lib/modules/`uname -r`/build/include -c my_mod.c to be executed from the driver directory (e.g. ./drivers/usb/serial). This does not work if I am trying to build a 2.6 kernel from a 2.4 system. So I guess I have to build and boot from the 2.6 kernel and the try and build the separate modules. If I can install and boot from a new 2.6 kernel will the appropriate headers magically find their way to /lib/modules/`uname -r`/build/include which will be /lib/modules/2.6.0-test2/build/include ?? As I am looking at starting a new module I will not be able to use the existing makefiles. Is this command line option the best one? Thanks for any help. So far my first kernel
[linux-usb-devel] Newbie: tarballs, 2.6 and building a driver
Hi All, I'm new to building Linux drivers but not new to device drivers, o I need some specific help for the RedHat platform. I have RH 9 (2.4) installed and setup for driver development. I have all the CD's. I need to extract the kernel tarball to my home directory for development. Where is the kernel tarball? I presume it is a kernel-xxx-xx-xx.tar.Z type file? I have the RedHat 9 disks so I presume it is on one of them or on my system already? I have worked out how to build the drivers tree I think and I discovered the binaries under the /lib directory. Once I have my driver's source code under my own directory under usb/serial, how do I build it? Do I have to go and add an entry for it to all the Makefiles and configuration files or can I just write a Makefile for my single driver? Does someone have a development Makefile for this purpose? Ok, how do I go about getting 2.6 kernel? The auto-update application thingy in RH gives me the option to update the kernel and sources to a later version of 2.4, but not 2.6. I guess version 2.6 is still experimental? How can I update the kernel and sources? Will this overwrite the sources in /usr/src or add another directory and symbolically link to it? Will there be a tarball somewhere I can then use to build my own development directory from the 2.6 kernel? Cheers and thanks for any help! SAB. --- This SF.Net email sponsored by: Free pre-built ASP.NET sites including Data Reports, E-commerce, Portals, and Forums are available now. Download today and enter to win an XBOX or Visual Studio .NET. http://aspnet.click-url.com/go/psa0013ave/direct;at.aspnet_072303_01/01 ___ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
