diff -Nrup a/gdb/gdbserver/ax.c b/gdb/gdbserver/ax.c
--- a/gdb/gdbserver/ax.c	2019-11-18 18:49:19.000000000 -0700
+++ b/gdb/gdbserver/ax.c	2019-12-19 21:30:19.512505411 -0700
@@ -25,7 +25,7 @@
 static void ax_vdebug (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
 
 #ifdef IN_PROCESS_AGENT
-int debug_agent = 0;
+bool debug_agent = 0;
 #endif
 
 static void