Revert the '-o output_file_name' option changes.

usr.bin/yacc/main.c

@@ -144,7 +144,7 @@ set_signals()
 
 usage()
 {
-    fprintf(stderr, "usage: %s [-dlrtv] [-b file_prefix] [-o output_file_name] [-p symbol_prefix] filename\n", myname);
+    fprintf(stderr, "usage: %s [-dlrtv] [-b file_prefix] [-p symbol_prefix] filename\n", myname);
     exit(1);
 }
 
@@ -189,15 +189,6 @@ char *argv[];
 	    lflag = 1;
 	    break;
 
-	case 'o':
-	    if (*++s)
-		output_file_name = s;
-	    else if (++i < argc)
-		output_file_name = argv[i];
-	    else
-		usage();
-	    continue;
-
 	case 'p':
 	    if (*++s)
 		symbol_prefix = s;
@@ -325,13 +316,11 @@ create_file_names()
 
     len = strlen(file_prefix);
 
-    if (!output_file_name) {
     output_file_name = MALLOC(len + 7);
     if (output_file_name == 0)
 	no_space();
     strcpy(output_file_name, file_prefix);
     strcpy(output_file_name + len, OUTPUT_SUFFIX);
-    }
 
     if (rflag)
     {

usr.bin/yacc/yacc.1

@@ -86,16 +86,6 @@ If the \fB-l\fR option is specified,
 will not insert the #line directives.
 Any #line directives specified by the user will be retained.
 .TP
-\fB-o \fIoutput_file_name\fR
-The
-.B -o
-option causes
-.I yacc
-to write the generated code to
-.IR output_file_name
-instead of the default file,
-.IR y.tab.c .
-.TP
 \fB-p \fIsymbol_prefix\fR
 The
 .B -p