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vivekian2
Asked: 2009-09-03 16:15:17 +0800 CST

compiling 64 bit linux kernel with gcc

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While trying to compile a 64 bit Linux kernel using GCC, I see the following error:

kernel/bounds.c:1: error: code model ‘kernel’ not supported in the 32 bit mode
kernel/bounds.c:1: sorry, unimplemented: 64-bit mode not compiled in

This is what gcc -v reports:

Using built-in specs.
Target: i586-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man -- infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/ bugzilla --enable-bootstrap --enable-shared --enable-threads=posix -- enable-checking=release --with-system-zlib --enable-__cxa_atexit -- disable-libunwind-exceptions --enable-languages=c,c++,objc,obj-c+ +,java,fortran,ada --enable-java-awt=gtk --disable-dssi --enable- plugin --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre -- enable-libgcj-multifile --enable-java-maintainer-mode --with-ecj-jar=/ usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-ppl -- with-cloog --with-tune=generic --with-arch=i586 --build=i586-redhat- linux
Thread model: posix
gcc version 4.4.1 20090725 (Red Hat 4.4.1-2) (GCC)

Am I missing something on my kernel make command line? Or is it the GCC present on the system does not support 64-bit compilation?

linux

1 Answers

  1. Best Answer

    From your gcc -v output it looks as if you are running on a 32-bit machine, is that correct ?

    Target: i586-redhat-linux

    Try specifying --with-arch=x86_64 insterad of i586.

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