diff -uNr boinc/lib/synch.cpp boinc.mod/lib/synch.cpp
--- boinc/lib/synch.cpp	2022-07-18 18:32:21.000000000 +0800
+++ boinc.mod/lib/synch.cpp	2022-09-11 21:07:05.419844109 +0800
@@ -18,7 +18,7 @@
 
 // interfaces for accessing sempahores
 
-#ifndef ANDROID
+#ifndef __ANDROID__
 
 #include "config.h"
 #include <cstdio>