Re: i386 -> x86_64 cross compile failure (binutils bug?)

[Lee Revell]

On Fri, 2005-12-09 at 18:23 -0600, Jeffrey Hundstad wrote:
> Lee Revell wrote:
> 
> >On Fri, 2005-12-09 at 16:37 -0600, Jeffrey Hundstad wrote:
> >  
> >
> >>Lee Revell wrote:
> >>
> >>    
> >>
> >>>I'm trying to build an x66-64 kernel on a 32 bit system (Ubuntu 5.10).
> >>>I added -m64 to the CFLAGS as per the gcc docs.  But the build fails
> >>>with:
> >>>
> >>>$ make ARCH=x86_64
> >>> [...]
> >>> CC      init/initramfs.o
> >>>
> >>>
> >>>      
> >>>
> >>I have successfully done this using Debian/Sid.
> >>
> >>    
> >>
> >
> >I added "-m64" to AFLAGS as well and now I get farther:
> >
> >  CC      arch/x86_64/ia32/syscall32.o
> >  AS      arch/x86_64/ia32/vsyscall-sysenter.o
> >arch/x86_64/ia32/vsyscall-sysenter.S: Assembler messages:
> >arch/x86_64/ia32/vsyscall-sysenter.S:14: Error: suffix or operands invalid for `push'
> >arch/x86_64/ia32/vsyscall-sysenter.S:16: Error: suffix or operands invalid for `push'
> >arch/x86_64/ia32/vsyscall-sysenter.S:18: Error: suffix or operands invalid for `push'
> >arch/x86_64/ia32/vsyscall-sysenter.S:25: Error: suffix or operands invalid for `pop'
> >arch/x86_64/ia32/vsyscall-sysenter.S:27: Error: suffix or operands invalid for `pop'
> >arch/x86_64/ia32/vsyscall-sysenter.S:29: Error: suffix or operands invalid for `pop'
> >arch/x86_64/ia32/vsyscall-sigreturn.S:16: Error: suffix or operands invalid for `pop'
> >make[1]: *** [arch/x86_64/ia32/vsyscall-sysenter.o] Error 1
> >make: *** [arch/x86_64/ia32] Error 2
> >
> >Lee
> >
> >  
> >
> 
> Yes, some commands NEED the -m64 and and WILL NOT work with -m64.
> 
> Really, try my method.  I've done it without all that making a separate 
> binutils non-sense.

Your scripts don't help.  I still need to add "-m64" to the CFLAGS and
AFLAGS to get it to work at all, otherwise gcc is invoked in 32 bit
mode, and they don't address the problem where some invocations of AS
need -m64 and some like:

  AS      arch/x86_64/ia32/vsyscall-sysenter.o

need -m32.

Lee

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