build fix for linux

diff --git a/lib/test.c b/lib/test.c
index d9e81a6..e574976 100644 (file)
--- a/lib/test.c
+++ b/lib/test.c
@@ -31,6 +31,7 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <signal.h>
 
 #include "utf8.h"
 #include "mem.h"