$NetBSD$

--- gdb/configure.orig	2019-07-16 00:00:27.000000000 +0000
+++ gdb/configure
@@ -13532,6 +13532,9 @@ if ${am_cv_langinfo_codeset+:} false; th
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
+#include <sys/param.h>
+#define _KMEMUSER
+#include <sys/lwp.h>
 #include <langinfo.h>
 int
 main ()
@@ -13998,6 +14001,7 @@ if ${gdb_cv_struct_lwp+:} false; then :
 else
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
+#define _KMEMUSER
 #include <sys/param.h>
 #define _KMEMUSER
 #include <sys/lwp.h>
