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

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This reverts commit 10175ba65f ("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>
This commit is contained in:
Masahiro Yamada
2021-04-11 04:45:32 +09:00
parent 7f5ff55bf8
commit 2ba50da9ec
2 changed files with 17 additions and 17 deletions
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14
scripts/kconfig/nconf.c
View File

@@ -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);