use gnulib's progname module

* bootstrap.conf (gnulib_modules): Add progname.
* src/*.c (program_name): Remove declaration.
* (main): Call set_program_name rather than setting program_name.
* src/nice.c (main): Cast program_name to "(char *)".
* src/prog-fprintf.c: Include "system.h"
* src/system.h: Include "progname.h".
* maint.mk (sc_program_name): Adjust rule.
Suggestion from Eric Blake.

1 files changed, 1 insertions, 4 deletions

diff --git a/src/fmt.c b/src/fmt.c
index 1f4e1da52..708e60bca 100644
--- a/src/fmt.c
+++ b/src/fmt.c
@@ -167,9 +167,6 @@ static void put_line (WORD *w, int indent);
 static void put_word (WORD *w);
 static void put_space (int space);
 
-/* The name this program was run with.  */
-char const *program_name;
-
 /* Option values.  */
 
 /* If true, first 2 lines may have different indent (default false).  */
@@ -324,7 +321,7 @@ main (int argc, char **argv)
   char const *max_width_option = NULL;
 
   initialize_main (&argc, &argv);
-  program_name = argv[0];
+  set_program_name (argv[0]);
   setlocale (LC_ALL, "");
   bindtextdomain (PACKAGE, LOCALEDIR);
   textdomain (PACKAGE);