kgdb's weak symbols vs. gcc 4.1

Hi,

I stumbled over some issue of kgdb in combination with gcc 4.1 since
kernel 2.6.16. The background can be found in [1]. It melts down that
the default arch-dependent functions in kernel/kgdb.c got compiled in -
and immediately optimised out again. The effect is, of course, lethal.

As a workaround I added "CFLAGS_kgdb.o += -fno-unit-at-a-time" to
kernel/Makefile, but I'm not sure if this is the preferred solution
here. Alternatives might be to move all default arch-stubs into a
separate object file, thus giving the linker the chance again to handle
them, or to use #ifndef KGDB_HAVE_ARCH_xxx constructs.

Jan


PS: Please CC me on reply.

[1] http://gcc.gnu.org/ml/gcc-help/2006-05/msg00202.html

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