Index: dialog-1.3-20160209/dialog.h
===================================================================
---
 dialog.h |   25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

--- dialog.h
+++ dialog.h	2023-06-19 07:07:17.437234579 +0000
@@ -43,6 +43,23 @@
 #include <string.h>
 #include <signal.h>	/* fork() etc. */
 #include <math.h>	/* sqrt() */
+#include <sys/ioctl.h>	/* struct winsize */
+
+#ifndef GCC_NORETURN
+#if defined(__GNUC__)
+#define GCC_NORETURN	__attribute__((noreturn))
+#else
+#define GCC_NORETURN /*nothing*/
+#endif
+#endif
+
+#ifndef GCC_UNUSED
+#if defined(__GNUC__)
+#define GCC_UNUSED	__attribute__((unused))
+#else
+#define GCC_UNUSED /*nothing*/
+#endif
+#endif
 
 /* header conflict with Solaris xpg4 versus <sys/regset.h> */
 #if defined(ERR) && (ERR == 13)
@@ -81,14 +98,6 @@
 #define GCC_PRINTFLIKE(fmt,var) /*nothing*/
 #endif
 
-#ifndef GCC_NORETURN
-#define GCC_NORETURN /*nothing*/
-#endif
-
-#ifndef GCC_UNUSED
-#define GCC_UNUSED /*nothing*/
-#endif
-
 /*
  * FIXME: a configure check would be useful
  */