Hello world build error!

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originally posted by helmchen@Feb 3 2007, 10:52 PM

didn't you try

make arch=nios2nommu cross_compile=nios2-linux-uclibc- -c ~/uclinux-dist/linux-2.6.x m=`pwd` modules

which you will need to compile device drivers

instead of

nios2-linux-uclibc-gcc linux-2.6.x/drivers/misc/hello.c -o hello -elf2flt="-s 4000"

which suits for user programm.

you will find detailed explanation in the kernel docs.

hope this helps, but i'm not a kernel crack

maybe you take a look at the nioswiki for the module programming example.

by the way let me ask you, what do you want to do?

do you want to write a device driver or a user program.

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hi Helmchen,

thank you very much for your reply, I&#39;m porting uCLinux on my own NiosII board, and start develope programme according to hippo&#39;s post:

http://forum.niosforum.com/forum/index.php?showtopic=3174 (http://forum.niosforum.com/forum/index.php?showtopic=3174)

when come to 11 tips, I have tied code he provided:

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nios2-linux-uclibc-gcc hello.c -o hello -elf2flt
cp hello ~/rootfs/bin

Rebuild the kernel image for initramfs, boot nios2 uClinux, and run

hello

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Here the &#39;hello.c&#39; is a user programme, I mistake it to a device driver, and use

nios2-linux-uclibc-gcc linux-2.6.x/drivers/misc/hello.c -o hello -elf2flt="-s 4000"

which is applied for user programme, so got the errors.

Now I write a "hello world" user programme, and compiled successfully according the code.

Thanks again!

And I have a question:

I have make a "hello_world" module which is a simple device driver, but I can only dynamic add it by "modprobe hello_world".

Do you know how to add it with static method,namely add this module in when the kernel start?