Re: Cross compiling MIPS kernel under x86

Jan Rovins <janr@xxxxxxxx> · Mon, 24 May 2010 10:32:12 -0400

octane indice wrote:
Hello

I have an octeon board. I'm trying to use a custom kernel from kernel.org
instead of the Cavium one.

Under x86, I installed the CrossTools from kegel:
http://www.kegel.com/crosstool/

I tried to cross compile:
octane@darkstar:/opt/linux-2.6.34$ make ARCH=mips
CROSS_COMPILE=/opt/crosstool/gcc-3.4.5-glibc-2.3.6/mips-unknown-linux-gnu/bin/mips-unknown-linux-gnu-
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
  Checking missing-syscalls for N32
  CALL    scripts/checksyscalls.sh
  Checking missing-syscalls for O32
  CALL    scripts/checksyscalls.sh
  CALL    scripts/checksyscalls.sh
  CC      scripts/mod/empty.o
Assembler messages:
Error: Bad value (octeon) for -march
make[2]: *** [scripts/mod/empty.o] Error 1
make[1]: *** [scripts/mod] Error 2
make: *** [scripts] Error 2

So, I'm obviously missing a thing, but what?

Here is other information:
octane@darkstar:/opt$ cat world.c 
#include <stdio.h>
int main()
{
    printf("Hello world!\n");
    return 0;
}
octane@darkstar:/opt$
/opt/crosstool/gcc-3.4.5-glibc-2.3.6/mips-unknown-linux-gnu/bin/mips-unknown-linux-gnu-gcc
-march=octeon -o hello world.c 
world.c:1: error: bad value (octeon) for -march
octane@darkstar:/opt$

octane@darkstar:/opt$ ls
/opt/crosstool/gcc-3.4.5-glibc-2.3.6/mips-unknown-linux-gnu/bin/
fix-embedded-paths*                mips-unknown-linux-gnu-gcov*
mips-unknown-linux-gnu-addr2line*  mips-unknown-linux-gnu-gprof*
mips-unknown-linux-gnu-ar*         mips-unknown-linux-gnu-ld*
mips-unknown-linux-gnu-as*         mips-unknown-linux-gnu-nm*
mips-unknown-linux-gnu-c++*        mips-unknown-linux-gnu-objcopy*
mips-unknown-linux-gnu-c++filt*    mips-unknown-linux-gnu-objdump*
mips-unknown-linux-gnu-cpp*        mips-unknown-linux-gnu-ranlib*
mips-unknown-linux-gnu-g++*        mips-unknown-linux-gnu-readelf*
mips-unknown-linux-gnu-gcc*        mips-unknown-linux-gnu-size*
mips-unknown-linux-gnu-gcc-3.4.5*  mips-unknown-linux-gnu-strings*
mips-unknown-linux-gnu-gccbug*     mips-unknown-linux-gnu-strip*

So, is it a problem with octeon arch and gcc, or a mips problem?

Thanks

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gcc-3.4.5-glibc-2.3.6

The recognition of "octeon" as an option does not show up in GCC until mainstream version 4.4.
looks like your gcc is too old 
gcc-3.4.5-glibc-2.3.6

Jan