Improve make-docfile.c for C23

* lib-src/make-docfile.c (write_c_args): Don’t diagnose “()”.
In C23 it’s equivalent to (void), and it works fine (albeit with
less type-checking) in older C.  Omit first arg, which is no
longer needed.  Caller changed.

1 files changed, 5 insertions, 6 deletions

diff --git a/lib-src/make-docfile.c b/lib-src/make-docfile.c
index 068b36f1b74..f59ce7def35 100644
--- a/lib-src/make-docfile.c
+++ b/lib-src/make-docfile.c
@@ -485,7 +485,7 @@ read_c_string_or_comment (FILE *infile, int printflag, bool comment,
    MINARGS and MAXARGS are the minimum and maximum number of arguments.  */
 
 static void
-write_c_args (char *func, char *buf, int minargs, int maxargs)
+write_c_args (char *buf, int minargs, int maxargs)
 {
   char *p;
   bool in_ident = false;
@@ -522,10 +522,7 @@ write_c_args (char *func, char *buf, int minargs, int maxargs)
       if (c == ',' || c == ')')
         {
           if (ident_length == 0)
-            {
-              error ("empty arg list for '%s' should be (void), not ()", func);
-              continue;
-            }
+            continue;
 
           if (strncmp (ident_start, "void", ident_length) == 0)
             continue;
@@ -551,6 +548,8 @@ write_c_args (char *func, char *buf, int minargs, int maxargs)
                   c = '-';
                 putchar (c);
               }
+
+          ident_length = 0;
         }
     }
 
@@ -1220,7 +1219,7 @@ scan_c_stream (FILE *infile)
               *p = '\0';
               /* Output them.  */
               fputs ("\n\n", stdout);
-              write_c_args (input_buffer, argbuf, minargs, maxargs);
+              write_c_args (argbuf, minargs, maxargs);
             }
           else if (defunflag && maxargs == -1 && !saw_usage)
             /* The DOC should provide the usage form.  */