*: add -Wunused-parameter; fix resulting breakage

function                                             old     new   delta
procps_scan                                         1265    1298     +33
aliascmd                                             278     283      +5
parse_file_cmd                                       116     120      +4
dname_enc                                            373     377      +4
setcmd                                                90      93      +3
execcmd                                               57      60      +3
count_lines                                           72      74      +2
process_command_subs                                 340     339      -1
test_main                                            409     407      -2
mknod_main                                           179     177      -2
handle_incoming_and_exit                            2653    2651      -2
argstr                                              1312    1310      -2
shiftcmd                                             131     128      -3
exitcmd                                               46      43      -3
dotcmd                                               297     294      -3
breakcmd                                              86      83      -3
evalpipe                                             353     349      -4
evalcommand                                         1180    1176      -4
evalcmd                                              109     105      -4
send_tree                                            374     369      -5
mkfifo_main                                           82      77      -5
evalsubshell                                         152     147      -5
typecmd                                               75      69      -6
letcmd                                                61      55      -6
add_cmd                                             1190    1183      -7
main                                                 891     883      -8
ash_main                                            1415    1407      -8
parse_stream                                        1377    1367     -10
alloc_procps_scan                                     55       -     -55
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 7/21 up/down: 54/-148)          Total: -94 bytes
   text    data     bss     dec     hex filename
 797195     658    7428  805281   c49a1 busybox_old
 797101     658    7428  805187   c4943 busybox_unstripped

5 files changed, 9 insertions, 9 deletions

diff --git a/editors/cmp.c b/editors/cmp.c
index 6dfe0401b..9189b3150 100644
--- a/editors/cmp.c
+++ b/editors/cmp.c
@@ -43,7 +43,7 @@ static const char opt_chars[] ALIGN1 = "sl";
 #define CMP_OPT_l (1<<1)
 
 int cmp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int cmp_main(int argc, char **argv)
+int cmp_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
         FILE *fp1, *fp2, *outfile = stdout;
         const char *filename1, *filename2 = "-";
diff --git a/editors/diff.c b/editors/diff.c
index 1359af838..f9e82ba02 100644
--- a/editors/diff.c
+++ b/editors/diff.c
@@ -1205,7 +1205,7 @@ static void diffdir(char *p1, char *p2)
 
 
 int diff_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int diff_main(int argc, char **argv)
+int diff_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
         bool gotstdin = 0;
         char *U_opt;
diff --git a/editors/patch.c b/editors/patch.c
index 1b283a133..ff1a01d2e 100644
--- a/editors/patch.c
+++ b/editors/patch.c
@@ -78,7 +78,7 @@ static int file_doesnt_exist(const char *filename)
 }
 
 int patch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int patch_main(int argc, char **argv)
+int patch_main(int argc ATTRIBUTE_UNUSED, char **argv)
 {
         int patch_level = -1;
         char *patch_line;
diff --git a/editors/sed.c b/editors/sed.c
index c2b9e94b6..a0994aec0 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -301,7 +301,7 @@ static int get_address(const char *my_str, int *linenum, regex_t ** regex)
 }
 
 /* Grab a filename.  Whitespace at start is skipped, then goes to EOL. */
-static int parse_file_cmd(sed_cmd_t *sed_cmd, const char *filecmdstr, char **retval)
+static int parse_file_cmd(/*sed_cmd_t *sed_cmd,*/ const char *filecmdstr, char **retval)
 {
         int start = 0, idx, hack = 0;
 
@@ -375,7 +375,7 @@ static int parse_subst_cmd(sed_cmd_t *sed_cmd, const char *substr)
                 case 'w':
                 {
                         char *temp;
-                        idx += parse_file_cmd(sed_cmd, substr+idx, &temp);
+                        idx += parse_file_cmd(/*sed_cmd,*/ substr+idx, &temp);
                         break;
                 }
                 /* Ignore case (gnu exension) */
@@ -436,7 +436,7 @@ static const char *parse_cmd_args(sed_cmd_t *sed_cmd, const char *cmdstr)
         } else if (strchr("rw", sed_cmd->cmd)) {
                 if (sed_cmd->end_line || sed_cmd->end_match)
                         bb_error_msg_and_die("command only uses one address");
-                cmdstr += parse_file_cmd(sed_cmd, cmdstr, &sed_cmd->string);
+                cmdstr += parse_file_cmd(/*sed_cmd,*/ cmdstr, &sed_cmd->string);
                 if (sed_cmd->cmd == 'w') {
                         sed_cmd->sw_file = xfopen(sed_cmd->string, "w");
                         sed_cmd->sw_last_char = '\n';
diff --git a/editors/vi.c b/editors/vi.c
index 572e04972..c2d4457e9 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -301,7 +301,7 @@ static void status_line_bold(const char *, ...);
 static void not_implemented(const char *); // display "Not implemented" message
 static int format_edit_status(void);    // format file status on status line
 static void redraw(int);        // force a full screen refresh
-static char* format_line(char*, int);
+static char* format_line(char* /*, int*/);
 static void refresh(int);       // update the terminal from screen[]
 
 static void Indicate_Error(void);       // use flash or beep to indicate error
@@ -2764,7 +2764,7 @@ static void redraw(int full_screen)
 }
 
 //----- Format a text[] line into a buffer ---------------------
-static char* format_line(char *src, int li)
+static char* format_line(char *src /*, int li*/)
 {
         unsigned char c;
         int co;
@@ -2848,7 +2848,7 @@ static void refresh(int full_screen)
                 int cs, ce;                             // column start & end
                 char *out_buf;
                 // format current text line
-                out_buf = format_line(tp, li);
+                out_buf = format_line(tp /*, li*/);
 
                 // skip to the end of the current text[] line
                 if (tp < end) {