CONFIG_X86_L1_CACHE_SHIFT & /usr/include/linux/ error

[Guest dmiller.org]

I solved the error below when trying to compile a usb driver with Mandrake linux 9.1. The driver had 2 includes: linux/usb.h & linux/module.h which caused the following error:

 

The Error Message

===============================================

In file included from /usr/include/linux/prefetch.h:13,

from /usr/include/linux/list.h:6,

from /usr/include/linux/module.h:11,

from activewire.c:28:

/usr/include/asm/processor.h:55: `CONFIG_X86_L1_CACHE_SHIFT' undeclared here (not in a function)

/usr/include/asm/processor.h:55: requested alignment is not a constant

In file included from /usr/include/linux/module.h:297,

from activewire.c:28:

/usr/include/linux/version.h:2:2: #error "======================================================="

/usr/include/linux/version.h:3:2: #error "You should not include /usr/include/{linux,asm}/ header"

/usr/include/linux/version.h:4:2: #error "files directly for the compilation of kernel modules."

/usr/include/linux/version.h:5:2: #error ""

/usr/include/linux/version.h:6:2: #error "glibc now uses kernel header files from a well-defined"

/usr/include/linux/version.h:7:2: #error "working kernel version (as recommended by Linus Torvalds)"

/usr/include/linux/version.h:8:2: #error "These files are glibc internal and may not match the"

/usr/include/linux/version.h:9:2: #error "currently running kernel. They should only be"

/usr/include/linux/version.h:10:2: #error "included via other system header files - user space"

/usr/include/linux/version.h:11:2: #error "programs should not directly include <linux/*.h> or"

/usr/include/linux/version.h:12:2: #error "<asm/*.h> as well."

/usr/include/linux/version.h:13:2: #error ""

/usr/include/linux/version.h:14:2: #error "To build kernel modules please do the following:"

/usr/include/linux/version.h:15:2: #error ""

/usr/include/linux/version.h:16:2: #error " o Have the kernel sources installed"

/usr/include/linux/version.h:17:2: #error ""

/usr/include/linux/version.h:18:2: #error " o Make sure that the symbolic link"

/usr/include/linux/version.h:19:2: #error " /lib/modules/`uname -r`/build exists and points to"

/usr/include/linux/version.h:20:2: #error " the matching kernel source directory"

/usr/include/linux/version.h:21:2: #error ""

/usr/include/linux/version.h:22:2: #error " o Now copy /boot/vmlinuz.version.h to"

/usr/include/linux/version.h:23:2: #error " /lib/modules/`uname -r`/build/include/linux/version.h"

/usr/include/linux/version.h:24:2: #error ""

/usr/include/linux/version.h:25:2: #error " o When compiling, make sure to use the following"

/usr/include/linux/version.h:26:2: #error " compiler option to use the correct include files:"

/usr/include/linux/version.h:27:2: #error ""

/usr/include/linux/version.h:28:2: #error " -I/lib/modules/`uname -r`/build/include"

/usr/include/linux/version.h:29:2: #error ""

/usr/include/linux/version.h:30:2: #error " instead of"

/usr/include/linux/version.h:31:2: #error ""

/usr/include/linux/version.h:32:2: #error " -I/usr/include/linux"

/usr/include/linux/version.h:33:2: #error ""

/usr/include/linux/version.h:34:2: #error " Please adjust the Makefile accordingly."

/usr/include/linux/version.h:35:2: #error "======================================================="

In file included from activewire.c:28:

/usr/include/linux/module.h:299: parse error before "UTS_RELEASE"

===============================================

 

 

The Solution:

 

1) Go to Mandrake Control Centre

1.1) go to Software management

1.2) select option "all packages alphabetical"

1.3) select "kernel-source-2.4.21-0.13mdk"

1.4) install from installation CD3 - takes about 5-10 mins

 

 

2) Create a new directory "build" at /lib/modules/2.4.21-0.13mdk/

 

 

3) create a new symbolic link:

 

ln -s /usr/src/linux/include/ /lib/modules/2.4.21-0.13mdk/build/

 

This creates a symbolic link of a directory "include" within "build" pointing to /usr/src/linux/include/. Incidentally I found the "/" at the beginning of /usr/src/linux/include/ in the link statement important.

 

 

4) add to the compile command in the Makefile the option:

-I /lib/modules/2.4.21-013mdk/build/include

This makes sure that the "includes" come from /usr/src/linux/include/ via the symbolic link at /lib/modules/2.4.21-013mdk/build/include, and not from /usr/include/linux/ which causes all the errors above.

From memory my compile command looks like:

gcc -o activewire.o -I /lib/modules/2.4.21-013mdk/build/include activewire.c

 

 

Hope all this helps.

David