util: Don't link host-utils.o if it's empty

Reported-by: NPeter Maydell <peter.maydell@linaro.org>
Tested-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

util/Makefile.objs

 util-obj-y = osdep.o cutils.o unicode.o qemu-timer-common.o
 util-obj-$(CONFIG_WIN32) += oslib-win32.o qemu-thread-win32.o event_notifier-win32.o
 util-obj-$(CONFIG_POSIX) += oslib-posix.o qemu-thread-posix.o event_notifier-posix.o qemu-openpty.o
-util-obj-y += envlist.o path.o host-utils.o module.o
+util-obj-y += envlist.o path.o module.o
+util-obj-$(call lnot,$(CONFIG_INT128)) += host-utils.o
 util-obj-y += bitmap.o bitops.o hbitmap.o
 util-obj-y += fifo8.o
 util-obj-y += acl.o

util/host-utils.c

@@ -28,7 +28,6 @@
 #include "qemu/host-utils.h"
 
 /* Long integer helpers */
-#ifndef CONFIG_INT128
 static inline void mul64(uint64_t *plow, uint64_t *phigh,
                          uint64_t a, uint64_t b)
 {
@@ -161,4 +160,3 @@ int divs128(int64_t *plow, int64_t *phigh, int64_t divisor)
     return overflow;
 }
 
-#endif /* !CONFIG_INT128 */