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SubjectRe: Kernel Cross Compiling
>>>>> 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.

--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>

-
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