1 files changed, 6 insertions, 0 deletions
diff --git a/makeint.h b/makeint.h
index ab41665..da267cb 100644
--- a/makeint.h
+++ b/makeint.h
@@ -424,6 +424,12 @@ extern struct rlimit stack_limit;
 /* The number of bytes needed to represent the largest integer as a string.  */
 #define INTSTR_LENGTH         CSTRLEN ("18446744073709551616")
 
+#ifdef HAVE_TTYNAME
+# define TTYNAME(_f) ttyname (_f)
+#else
+# define TTYNAME(_f) "true"
+#endif
+
 
 const char *concat (unsigned int, ...);
 void message (int prefix, size_t length, const char *fmt, ...)