On 20090131.1659+0100, Vincent Sanders <vince@kyllikki.org> wrote:
[This]patch is a bit more involved. The patch addresses a gcc
regression in the 4.3 series (specifically this patch is against 4.3.2
which does *not* have a lot of other issues which affect kernel building)

GCC bug tracker has this issue as
#38453 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38453
#32044 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32044

comment 65 of #32044 has the fix being applied to gcc trunk as revision #142719

The attached patch is a backport to gcc 4.3.2 which allows this
version to be used to generate correct output for various ARM kernel
build (and indeed is teh correct answer in general).

/trunk/patches/gcc/4.3.2/360-fix-expensive-optimize.patch | 207 207 0 0 +++++++++++++++++++++
1 file changed, 207 insertions(+)

Original patch from: ../4.3.2/240-pr25343.patch

-= BEGIN original header =-

Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.1/gentoo/66_all_gcc43-pr25343.patch

http://gcc.gnu.org/PR25343

sniped from Debian

2008-04-27  Roman Zippel <zippel@linux-m68k.org>

	* config/host-linux.c (TRY_EMPTY_VM_SPACE): Define for __mc68000__.

-= END original header =-

diff -durN gcc-4.3.3.orig/gcc/config/host-linux.c gcc-4.3.3/gcc/config/host-linux.c

--- gcc-4.3.3.orig/gcc/config/host-linux.c	2007-08-02 12:49:31.000000000 +0200

+++ gcc-4.3.3/gcc/config/host-linux.c	2009-01-27 22:25:31.000000000 +0100

@@ -84,6 +84,8 @@

 # define TRY_EMPTY_VM_SPACE	0x8000000000

 #elif defined(__sparc__)

 # define TRY_EMPTY_VM_SPACE	0x60000000

+#elif defined(__mc68000__)

+# define TRY_EMPTY_VM_SPACE	0x40000000

 #else

 # define TRY_EMPTY_VM_SPACE	0

 #endif