gcc-2.96-33 compiles kernel 2.4.0-test5-pre1 but when booting it hangs
after 'Starting kswapd v1.6'. I tried with egcs-1.1.2 and it boots just
fine, so the problem is probably a gcc issue, not a kernel one.
I inserted various 'printk("coucou\n")' in the code and it appears that the
problem occurs in linux/init/main.c lines 615--624:

static void __init do_initcalls(void)
{
	initcall_t *call;

	call = &__initcall_start;
	do {
		(*call)();
		call++;
	} while (call < &__initcall_end);
}

The first iteration, which threads kswapd, is correctly executed. In the
second, the computer hangs after (*call)(). Normally, if compiled with
egcs, the kernel outputs 'Detected PS/2 Mouse Port.' so it is possible that
the build problem is somewhere in the PS/2 driver.

Also note that kernel 2.4.0-test2 did not have this problem whereas
2.4.0-test4-pre6 did. I could not try with test3 because gcc was unable to
compile it.