Rewrote configure.in and replaced header.in with one generated by autoheader, added copyright notice to all source files as per GNU standards, and changed "pv --version" output to conform to GNU standards.

src/include/config-aux.h

@@ -0,0 +1,46 @@
+/*
+ * Standard definitions to make use of the config.h values set by the
+ * `configure' script.  Include this after config.h and before anything
+ * else.
+ *
+ * Copyright 2002-2008, 2010, 2012-2015, 2017, 2021, 2023 Andrew Wood
+ *
+ * Distributed under the Artistic License v2.0; see `doc/COPYING'.
+ */
+ 
+#ifdef ENABLE_NLS
+# include "library/gettext.h"
+#else
+# define _(String) (String)
+# define N_(String) (String)
+#endif
+
+#undef HAVE_IPC
+#ifdef HAVE_SYS_IPC_H
+#define HAVE_IPC 1
+#endif
+
+#undef CURSOR_ANSWERBACK_BYTE_BY_BYTE
+#ifndef _AIX
+#define CURSOR_ANSWERBACK_BYTE_BY_BYTE 1
+#endif
+
+/* Boolean type support */
+#undef HAVE_STDBOOL_H
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# ifndef HAVE__BOOL
+#  ifdef __cplusplus
+typedef bool _Bool;
+#  else
+#   define _Bool signed char
+#  endif
+# endif
+# define bool _Bool
+# define false 0
+# define true 1
+# define __bool_true_false_are_defined 1
+#endif
+
+/* EOF */

src/include/library/getopt.h

@@ -1,5 +1,9 @@
 /*
  * Replacement getopt function's header file. Include this AFTER config.h.
+ *
+ * Copyright 2002-2008, 2010, 2012-2015, 2017, 2021, 2023 Andrew Wood
+ *
+ * Distributed under the Artistic License v2.0; see `doc/COPYING'.
  */
 
 #ifndef _LIBRARY_GETOPT_H

src/include/library/gettext.h

@@ -9,6 +9,9 @@
  *   # define N_(String) (String)
  *   #endif
  *
+ * Copyright 2002-2008, 2010, 2012-2015, 2017, 2021, 2023 Andrew Wood
+ *
+ * Distributed under the Artistic License v2.0; see `doc/COPYING'.
  */
 
 #ifndef _LIBRARY_GETTEXT_H

src/include/options.h

@@ -1,5 +1,9 @@
 /*
  * Global program option structure and the parsing function prototype.
+ *
+ * Copyright 2002-2008, 2010, 2012-2015, 2017, 2021, 2023 Andrew Wood
+ *
+ * Distributed under the Artistic License v2.0; see `doc/COPYING'.
  */
 
 #ifndef _OPTIONS_H

src/include/pv-internal.h

@@ -1,33 +1,19 @@
 /*
- * Functions internal to the PV library.
+ * Functions internal to the PV library.  Include "config.h" first.
+ *
+ * Copyright 2002-2008, 2010, 2012-2015, 2017, 2021, 2023 Andrew Wood
+ *
+ * Distributed under the Artistic License v2.0; see `doc/COPYING'.
  */
 
 #ifndef _PV_INTERNAL_H
 #define _PV_INTERNAL_H 1
 
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#ifndef _PV_H
-#include "pv.h"
-#endif /* _PV_H */
-
 #include <signal.h>
 #include <sys/types.h>
 #include <sys/time.h>
 #include <sys/stat.h>
 
-/* 
- * Since macOS 10.6, stat64 variants are equivalent to plain stat, and the
- * suffixed versions have been removed in macOS 11.  See stat(2).
- */
-#if defined(__APPLE__) || defined(APPLE)
-#define stat64 stat
-#define fstat64 fstat
-#define lstat64 lstat
-#endif
-
 #ifdef __cplusplus
 extern "C" {
 #endif

src/include/pv.h

@@ -1,5 +1,9 @@
 /*
- * Functions used across the program.
+ * Functions used across the program.  Include "config.h" first.
+ *
+ * Copyright 2002-2008, 2010, 2012-2015, 2017, 2021, 2023 Andrew Wood
+ *
+ * Distributed under the Artistic License v2.0; see `doc/COPYING'.
  */
 
 #ifndef _PV_H