samba-3.0.7/source/lib/util-sec.c

/****************************************************************************
abort if we haven't set the uid correctly
****************************************************************************/
static void assert_uid(uid_t ruid, uid_t euid)
{
	if ((euid != (uid_t)-1 && geteuid() != euid) ||
	    (ruid != (uid_t)-1 && getuid() != ruid)) {
		if (!non_root_mode()) {
			DEBUG(0,("Failed to set uid privileges to (%d,%d) now set to (%d,%d)\n",
				 (int)ruid, (int)euid,
				 (int)getuid(), (int)geteuid()));
			smb_panic("failed to set uid\n");
			exit(1);
		}
	}
}

/****************************************************************************
abort if we haven't set the gid correctly
****************************************************************************/
static void assert_gid(gid_t rgid, gid_t egid)
{
	if ((egid != (gid_t)-1 && getegid() != egid) ||
	    (rgid != (gid_t)-1 && getgid() != rgid)) {
		if (!non_root_mode()) {
			DEBUG(0,("Failed to set gid privileges to (%d,%d) now set to (%d,%d) uid=(%d,%d)\n",
				 (int)rgid, (int)egid,
				 (int)getgid(), (int)getegid(),
				 (int)getuid(), (int)geteuid()));
			smb_panic("failed to set gid\n");
			exit(1);
		}
	}
}

I am afraid I did not see -fPIC, -DPIC option when cross compiling being done. The followind line is from NetBSD/macppc native compiling, but I may be wrong:

Compiling lib/util_sec.c with -fPIC -DPIC

patch -s < samba-3.0.5-cross
autoconf
env CC=/usr/local/bin/powerpc--linux-gcc ./configure --host=i386--linux --enable-cross

/usr/local/bin/powerpc--objdump -d bin/smbd |less

10190fbc <assert_uid>:
10190fbc:       94 21 ff e0     stwu    r1,-32(r1)

10190fe0:       41 82 00 10     beq-    10190ff0 <assert_uid+0x34>
10190fe4:       48 0d e8 05     bl      1026f7e8 <ports.6+0x6b4>