OSDev.org

Posted: **Sat May 16, 2009 3:06 pm**

When I try to compile this:

nasm -f aout kstart.asm -o kstart.o
nasm -f aout libasm.asm -o libasm.o
gcc -c kernel.c -o kernel.o
gcc -c libc.c  -o libc.o
ld -T link.ld -o kernel.bin kernel.o kstart.o libc.o libasm.o

I get the following error:

Code: Select all

kstart.o: file not recognized: File format is ambiguous
kstart.o: matching formats: a.out-i386 a.out-i386-bsd a.out-i386-lynx a.out-m88k-mach3 a.out-pc532-mach a.out-pdp11 a.out-vax-bsd vms-vax vms-vax

I can compile it at school with gcc-4.2.4 but not in my house with gcc-4.3.3.

Posted: **Sat May 16, 2009 4:31 pm**

You should really be making everything ELF instead of a.out, which is barely supported by anything anymore. The stuff compiled by gcc is probably ELF, and therefore things cannot be linked together. Use the -felf flags with nasm instead of -faout.

Posted: **Sat May 16, 2009 4:35 pm**

Thanks, that worked.

OSDev.org

[SOLVED] Nasm problem

[SOLVED] Nasm problem

Re: Nasm problem

Re: Nasm problem