Re: Kernel Cross Compiling

[Herbert Poetzl <herbert@13thfloor.at>]

On Fri, Feb 13, 2004 at 04:58:56PM -0800, David Mosberger wrote:
> >>>>> On Fri, 13 Feb 2004 22:44:20 +0100, Herbert Poetzl <herbert@13thfloor.at> said:
> 
>   >> A recipe for building ia32->ia64 cross-toolchain on Debian can be
>   >> found here:
> 
>   >> http://www.gelato.unsw.edu.au/IA64wiki/CrossCompilation
> 
>   Herbert> that might work with the ia64 libraries and headers, but it
>   Herbert> seems to fail, with the headers included in the gcc
>   Herbert> tarball, for cross compiling, if you get it to compile
>   Herbert> without (g)libc which should not be required to build the
>   Herbert> crossgcc and the kernel, I would be very interested ...
> 
> Ah, I see now what you mean.  I suspect that's a setup that's rarely
> tested, so I'm not surprised to see some breakage.
> 
> Having said that, I got gcc v3.3.3 20031212 (prerelease) to build with
> minor tweaks (see patch below).  I'm no GCC-built-environment expert
> and I'm quite certain that the patch isn't totally correct, but all
> the unwind-related stuff isn't really needed in your case, because
> that code only comes into play for exception-handling and C cleanup
> handlers.
> 
> The unwind-sjlj.c problem should occur on most other platforms too, so
> I don't think that problem is ia64-specific.

ah, thanks, will test it, and maybe upgrade to 3.3.3
if this seems necessary ...

best,
Herbert

> 	--david
> 
> Index: gcc/unwind-sjlj.c
> ===================================================================
> RCS file: /cvs/gcc/gcc/gcc/unwind-sjlj.c,v
> retrieving revision 1.11.2.2
> diff -u -r1.11.2.2 unwind-sjlj.c
> --- gcc/unwind-sjlj.c	2 May 2003 21:01:21 -0000	1.11.2.2
> +++ gcc/unwind-sjlj.c	14 Feb 2004 00:50:33 -0000
> @@ -22,7 +22,9 @@
>  #include "tconfig.h"
>  #include "tsystem.h"
>  #include "unwind.h"
> +#ifndef inhibit_libc
>  #include "gthr.h"
> +#endif
>  
>  #ifdef __USING_SJLJ_EXCEPTIONS__
>  
> Index: gcc/unwind.h
> ===================================================================
> RCS file: /cvs/gcc/gcc/gcc/unwind.h,v
> retrieving revision 1.7.2.6
> diff -u -r1.7.2.6 unwind.h
> --- gcc/unwind.h	4 Sep 2003 09:39:44 -0000	1.7.2.6
> +++ gcc/unwind.h	14 Feb 2004 00:50:33 -0000
> @@ -195,7 +195,9 @@
>     compatible with the standard ABI for IA-64, we inline these.  */
>  
>  #ifdef __ia64__
> -#include <stdlib.h>
> +# ifndef inhibit_libc
> +#  include <stdlib.h>
> +# endif
>  
>  static inline _Unwind_Ptr
>  _Unwind_GetDataRelBase (struct _Unwind_Context *_C)
> Index: gcc/config/ia64/fde-glibc.c
> ===================================================================
> RCS file: /cvs/gcc/gcc/gcc/config/ia64/fde-glibc.c,v
> retrieving revision 1.5
> diff -u -r1.5 fde-glibc.c
> --- gcc/config/ia64/fde-glibc.c	15 Dec 2001 11:46:51 -0000	1.5
> +++ gcc/config/ia64/fde-glibc.c	14 Feb 2004 00:50:34 -0000
> @@ -31,6 +31,9 @@
>  #ifndef _GNU_SOURCE
>  #define _GNU_SOURCE
>  #endif
> +
> +#ifndef inhibit_libc
> +
>  #include "config.h"
>  #include <stddef.h>
>  #include <stdlib.h>
> @@ -162,3 +165,5 @@
>  
>    return data.ret;
>  }
> +
> +#endif
> Index: gcc/config/ia64/linux.h
> ===================================================================
> RCS file: /cvs/gcc/gcc/gcc/config/ia64/linux.h,v
> retrieving revision 1.23
> diff -u -r1.23 linux.h
> --- gcc/config/ia64/linux.h	3 Sep 2002 21:09:54 -0000	1.23
> +++ gcc/config/ia64/linux.h	14 Feb 2004 00:50:34 -0000
> @@ -58,7 +58,7 @@
>  /* Do code reading to identify a signal frame, and set the frame
>     state data appropriately.  See unwind-dw2.c for the structs.  */
>  
> -#ifdef IN_LIBGCC2
> +#ifdef x_IN_LIBGCC2
>  #include <signal.h>
>  #include <sys/ucontext.h>
>