kconfig: nconf: get rid of (void) casts from wattrset() calls

This reverts commit 10175ba65fde ("nconfig: Silence unused return values
from wattrset").

With this patch applied, recent GCC versions can cleanly build nconf
without "value computed is not used" warnings.

The wattrset() used to be implemented as a macro, like this:

  #define wattrset(win,at) \
          (NCURSES_OK_ADDR(win) \
            ? ((win)->_attrs = NCURSES_CAST(attr_t, at), \
               OK) \
            : ERR)

The GCC bugzilla [1] reported a false-positive -Wunused-value warning
in a similar test case. It was fixed by GCC 4.4.1.

Let's revert that commit, and see if somebody will claim the issue.

[1]: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39889

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/kconfig/nconf.c b/scripts/kconfig/nconf.c
index 06ebe16e4a382235b2e2f95055acbae682790842..bcfcf0b87a7a7204ad4758ef2c10722fc8b89397 100644 (file)
--- a/scripts/kconfig/nconf.c
+++ b/scripts/kconfig/nconf.c
@@ -370,18 +370,18 @@ static void print_function_line(void)
        int lines = getmaxy(stdscr);
 
        for (i = 0; i < function_keys_num; i++) {
-               (void) wattrset(main_window, attributes[FUNCTION_HIGHLIGHT]);
+               wattrset(main_window, attributes[FUNCTION_HIGHLIGHT]);
                mvwprintw(main_window, lines-3, offset,
                                "%s",
                                function_keys[i].key_str);
-               (void) wattrset(main_window, attributes[FUNCTION_TEXT]);
+               wattrset(main_window, attributes[FUNCTION_TEXT]);
                offset += strlen(function_keys[i].key_str);
                mvwprintw(main_window, lines-3,
                                offset, "%s",
                                function_keys[i].func);
                offset += strlen(function_keys[i].func) + skip;
        }
-       (void) wattrset(main_window, attributes[NORMAL]);
+       wattrset(main_window, attributes[NORMAL]);
 }
 
 /* help */
@@ -954,16 +954,16 @@ static void show_menu(const char *prompt, const char *instructions,
        current_instructions = instructions;
 
        clear();
-       (void) wattrset(main_window, attributes[NORMAL]);
+       wattrset(main_window, attributes[NORMAL]);
        print_in_middle(stdscr, 1, 0, getmaxx(stdscr),
                        menu_backtitle,
                        attributes[MAIN_HEADING]);
 
-       (void) wattrset(main_window, attributes[MAIN_MENU_BOX]);
+       wattrset(main_window, attributes[MAIN_MENU_BOX]);
        box(main_window, 0, 0);
-       (void) wattrset(main_window, attributes[MAIN_MENU_HEADING]);
+       wattrset(main_window, attributes[MAIN_MENU_HEADING]);
        mvwprintw(main_window, 0, 3, " %s ", prompt);
-       (void) wattrset(main_window, attributes[NORMAL]);
+       wattrset(main_window, attributes[NORMAL]);
 
        set_menu_items(curses_menu, curses_menu_items);
 

diff --git a/scripts/kconfig/nconf.gui.c b/scripts/kconfig/nconf.gui.c
index a914f81092d702497f220ddb83da5b1be3172331..180d3158d380245b6562297519f9d243ac53c2c7 100644 (file)
--- a/scripts/kconfig/nconf.gui.c
+++ b/scripts/kconfig/nconf.gui.c
@@ -167,7 +167,7 @@ void print_in_middle(WINDOW *win,
        length = strlen(string);
        temp = (width - length) / 2;
        x = startx + (int)temp;
-       (void) wattrset(win, color);
+       wattrset(win, color);
        mvwprintw(win, y, x, "%s", string);
        refresh();
 }
@@ -297,11 +297,11 @@ int btn_dialog(WINDOW *main_window, const char *msg, int btn_num, ...)
        set_menu_fore(menu, attributes[DIALOG_MENU_FORE]);
        set_menu_back(menu, attributes[DIALOG_MENU_BACK]);
 
-       (void) wattrset(win, attributes[DIALOG_BOX]);
+       wattrset(win, attributes[DIALOG_BOX]);
        box(win, 0, 0);
 
        /* print message */
-       (void) wattrset(msg_win, attributes[DIALOG_TEXT]);
+       wattrset(msg_win, attributes[DIALOG_TEXT]);
        fill_window(msg_win, msg);
 
        set_menu_win(menu, win);
@@ -405,16 +405,16 @@ int dialog_inputbox(WINDOW *main_window,
        form_win = derwin(win, 1, prompt_width, prompt_lines+3, 2);
        keypad(form_win, TRUE);
 
-       (void) wattrset(form_win, attributes[INPUT_FIELD]);
+       wattrset(form_win, attributes[INPUT_FIELD]);
 
-       (void) wattrset(win, attributes[INPUT_BOX]);
+       wattrset(win, attributes[INPUT_BOX]);
        box(win, 0, 0);
-       (void) wattrset(win, attributes[INPUT_HEADING]);
+       wattrset(win, attributes[INPUT_HEADING]);
        if (title)
                mvwprintw(win, 0, 3, "%s", title);
 
        /* print message */
-       (void) wattrset(prompt_win, attributes[INPUT_TEXT]);
+       wattrset(prompt_win, attributes[INPUT_TEXT]);
        fill_window(prompt_win, prompt);
 
        mvwprintw(form_win, 0, 0, "%*s", prompt_width, " ");
@@ -576,7 +576,7 @@ void show_scroll_win(WINDOW *main_window,
 
        /* create the pad */
        pad = newpad(total_lines+10, total_cols+10);
-       (void) wattrset(pad, attributes[SCROLLWIN_TEXT]);
+       wattrset(pad, attributes[SCROLLWIN_TEXT]);
        fill_window(pad, text);
 
        win_lines = min(total_lines+4, lines-2);
@@ -591,9 +591,9 @@ void show_scroll_win(WINDOW *main_window,
        win = newwin(win_lines, win_cols, y, x);
        keypad(win, TRUE);
        /* show the help in the help window, and show the help panel */
-       (void) wattrset(win, attributes[SCROLLWIN_BOX]);
+       wattrset(win, attributes[SCROLLWIN_BOX]);
        box(win, 0, 0);
-       (void) wattrset(win, attributes[SCROLLWIN_HEADING]);
+       wattrset(win, attributes[SCROLLWIN_HEADING]);
        mvwprintw(win, 0, 3, " %s ", title);
        panel = new_panel(win);