--- src/src/snprintf.c	2009-04-10 13:39:23.000000000 +0000
+++ patches/snprintf.c	2017-05-19 07:45:08.926751318 +0000
@@ -522,7 +522,9 @@
 static UINTMAX_T myround(LDOUBLE);
 static LDOUBLE mypow10(int);
 
+#ifndef __ANDROID__
 extern int errno;
+#endif
 
 int
 rpl_vsnprintf(char *str, size_t size, const char *format, va_list args)