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Date: Fri, 7 Oct 2011 14:49:16 +0530 From: "Premi, Sanjeev" <premi@...com> To: Michal Marek <mmarek@...e.cz> CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: RE: [PATCH] kconfig: fix warnings due to unused return values > -----Original Message----- > From: Michal Marek [mailto:mmarek@...e.cz] > Sent: Wednesday, October 05, 2011 8:38 PM > To: Premi, Sanjeev > Cc: linux-kernel@...r.kernel.org > Subject: Re: [PATCH] kconfig: fix warnings due to unused return values > > On 22.9.2011 13:36, Sanjeev Premi wrote: > > The return value of wattrset() is being ignored in the > > code and newer compilers complain about this e.g. > > > > HOSTCC scripts/kconfig/lxdialog/checklist.o > > scripts/kconfig/lxdialog/checklist.c: In function print_item: > > scripts/kconfig/lxdialog/checklist.c:40: warning: value > computed is not used > > scripts/kconfig/lxdialog/checklist.c:46: warning: value > computed is not used > > > > Let the compiler know that ignore is intentional. > > > > Signed-off-by: Sanjeev Premi <premi@...com> > > --- > > > > The patch was created against the last pull from git.kernel.org > > The 'pull' from github is taking more than few hours... > > > > Based on the time stamps at this url, I believe the patch should > > apply cleanly: > > > https://github.com/torvalds/linux/tree/master/scripts/kconfig/lxdialog > > The latest kconfig tree is at http://repo.or.cz/w/linux-kbuild.git, > branch kconfig. You can pull it by > > $ git fetch git://repo.or.cz/linux-kbuild.git kconfig:kconfig Sure, I will pull it. > > > diff --git a/scripts/kconfig/lxdialog/checklist.c > b/scripts/kconfig/lxdialog/checklist.c > > index a2eb80f..8407849 100644 > > --- a/scripts/kconfig/lxdialog/checklist.c > > +++ b/scripts/kconfig/lxdialog/checklist.c > > @@ -37,20 +37,20 @@ static void print_item(WINDOW * win, > int choice, int selected) > > list_item[list_width - item_x] = '\0'; > > > > /* Clear 'residue' of last item */ > > - wattrset(win, dlg.menubox.atr); > > + (void)wattrset(win, dlg.menubox.atr); > > wmove(win, choice, 0); > > for (i = 0; i < list_width; i++) > > waddch(win, ' '); > > > > wmove(win, choice, check_x); > > - wattrset(win, selected ? dlg.check_selected.atr > > + (void)wattrset(win, selected ? dlg.check_selected.atr > > Uhm, not pretty. Agree. But, of course, I am not too conversant with Kconfig code. Just found these prints to be nagging after migrating to machines. > What ncurses version are you using? Can you post the > output of make V=1 menuconfig? It seems like wattrset is defined as a > macro instead of a function call. FWIW, it does not print any warnings > here with > > $ rpm -qf /usr/include/ncurses > ncurses-devel-5.8-2.6.x86_64 > and > gcc version 4.6.1 20110801 [gcc-4_6-branch revision 177033] > (SUSE Linux) > > on openSUSE Factory. > > Michal > I am on Ubuntu 10.04.1 LTS premi # premi # gcc --version gcc (Ubuntu 4.4.3-4ubuntu5) 4.4.3 Copyright (C) 2009 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. premi # premi # premi # dpkg --get-selections | grep curses lib32ncurses5 install libcurses-perl install libcurses-ui-perl install libncurses5 install libncurses5-dev install libncursesw5 install ncurses-base install ncurses-bin install premi # premi # make V=1 menuconfig make -f scripts/Makefile.build obj=scripts/basic rm -f .tmp_quiet_recordmcount mkdir -p include/linux include/config make -f scripts/Makefile.build obj=scripts/kconfig menuconfig /bin/sh /home/premi/linux-omap-2.6/scripts/kconfig/lxdialog/check-lxdialog.sh -check gcc -DCURSES_LOC="<ncurses.h>" -DLOCALE -lncurses gcc -Wp,-MD,scripts/kconfig/lxdialog/.checklist.o.d -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -DCURSES_LOC="<ncurses.h>" -DLOCALE -c -o scripts/kconfig/lxdialog/checklist.o scripts/kconfig/lxdialog/checklist.c scripts/kconfig/lxdialog/checklist.c: In function âprint_itemâ: scripts/kconfig/lxdialog/checklist.c:40: warning: value computed is not used scripts/kconfig/lxdialog/checklist.c:46: warning: value computed is not used scripts/kconfig/lxdialog/checklist.c:51: warning: value computed is not used scripts/kconfig/lxdialog/checklist.c:53: warning: value computed is not used scripts/kconfig/lxdialog/checklist.c: In function âprint_arrowsâ: scripts/kconfig/lxdialog/checklist.c:71: warning: value computed is not used scripts/kconfig/lxdialog/checklist.c:75: warning: value computed is not used scripts/kconfig/lxdialog/checklist.c:86: warning: value computed is not used scripts/kconfig/lxdialog/checklist.c:90: warning: value computed is not used scripts/kconfig/lxdialog/checklist.c: In function âdialog_checklistâ: scripts/kconfig/lxdialog/checklist.c:153: warning: value computed is not used scripts/kconfig/lxdialog/checklist.c:157: warning: value computed is not used scripts/kconfig/lxdialog/checklist.c:162: warning: value computed is not used gcc -Wp,-MD,scripts/kconfig/lxdialog/.inputbox.o.d -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -DCURSES_LOC="<ncurses.h>" -DLOCALE -c -o scripts/kconfig/lxdialog/inputbox.o scripts/kconfig/lxdialog/inputbox.c scripts/kconfig/lxdialog/inputbox.c: In function âdialog_inputboxâ: scripts/kconfig/lxdialog/inputbox.c:74: warning: value computed is not used scripts/kconfig/lxdialog/inputbox.c:78: warning: value computed is not used scripts/kconfig/lxdialog/inputbox.c:83: warning: value computed is not used scripts/kconfig/lxdialog/inputbox.c:98: warning: value computed is not used scripts/kconfig/lxdialog/inputbox.c:131: warning: value computed is not used scripts/kconfig/lxdialog/inputbox.c:151: warning: value computed is not used gcc -Wp,-MD,scripts/kconfig/lxdialog/.menubox.o.d -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -DCURSES_LOC="<ncurses.h>" -DLOCALE -c -o scripts/kconfig/lxdialog/menubox.o scripts/kconfig/lxdialog/menubox.c scripts/kconfig/lxdialog/menubox.c: In function âdo_print_itemâ: scripts/kconfig/lxdialog/menubox.c:77: warning: value computed is not used scripts/kconfig/lxdialog/menubox.c:88: warning: value computed is not used scripts/kconfig/lxdialog/menubox.c:91: warning: value computed is not used scripts/kconfig/lxdialog/menubox.c: In function âprint_arrowsâ: scripts/kconfig/lxdialog/menubox.c:121: warning: value computed is not used scripts/kconfig/lxdialog/menubox.c:125: warning: value computed is not used scripts/kconfig/lxdialog/menubox.c:137: warning: value computed is not used scripts/kconfig/lxdialog/menubox.c:141: warning: value computed is not used scripts/kconfig/lxdialog/menubox.c: In function âdialog_menuâ: scripts/kconfig/lxdialog/menubox.c:214: warning: value computed is not used scripts/kconfig/lxdialog/menubox.c:218: warning: value computed is not used scripts/kconfig/lxdialog/menubox.c:224: warning: value computed is not used gcc -Wp,-MD,scripts/kconfig/lxdialog/.textbox.o.d -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -DCURSES_LOC="<ncurses.h>" -DLOCALE -c -o scripts/kconfig/lxdialog/textbox.o scripts/kconfig/lxdialog/textbox.c scripts/kconfig/lxdialog/textbox.c: In function âdialog_textboxâ: scripts/kconfig/lxdialog/textbox.c:98: warning: value computed is not used scripts/kconfig/lxdialog/textbox.c:107: warning: value computed is not used scripts/kconfig/lxdialog/textbox.c:111: warning: value computed is not used scripts/kconfig/lxdialog/textbox.c: In function âprint_positionâ: scripts/kconfig/lxdialog/textbox.c:386: warning: value computed is not used gcc -Wp,-MD,scripts/kconfig/lxdialog/.util.o.d -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -DCURSES_LOC="<ncurses.h>" -DLOCALE -c -o scripts/kconfig/lxdialog/util.o scripts/kconfig/lxdialog/util.c scripts/kconfig/lxdialog/util.c: In function âattr_clearâ: scripts/kconfig/lxdialog/util.c:243: warning: value computed is not used scripts/kconfig/lxdialog/util.c: In function âdialog_clearâ: scripts/kconfig/lxdialog/util.c:259: warning: value computed is not used scripts/kconfig/lxdialog/util.c: In function âprint_titleâ: scripts/kconfig/lxdialog/util.c:316: warning: value computed is not used scripts/kconfig/lxdialog/util.c: In function âprint_buttonâ: scripts/kconfig/lxdialog/util.c:396: warning: value computed is not used scripts/kconfig/lxdialog/util.c:401: warning: value computed is not used scripts/kconfig/lxdialog/util.c:405: warning: value computed is not used scripts/kconfig/lxdialog/util.c:408: warning: value computed is not used scripts/kconfig/lxdialog/util.c:411: warning: value computed is not used scripts/kconfig/lxdialog/util.c: In function âdraw_shadowâ: scripts/kconfig/lxdialog/util.c:460: warning: value computed is not used gcc -Wp,-MD,scripts/kconfig/lxdialog/.yesno.o.d -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -DCURSES_LOC="<ncurses.h>" -DLOCALE -c -o scripts/kconfig/lxdialog/yesno.o scripts/kconfig/lxdialog/yesno.c scripts/kconfig/lxdialog/yesno.c: In function âdialog_yesnoâ: scripts/kconfig/lxdialog/yesno.c:64: warning: value computed is not used scripts/kconfig/lxdialog/yesno.c:68: warning: value computed is not used scripts/kconfig/lxdialog/yesno.c:73: warning: value computed is not used gcc -Wp,-MD,scripts/kconfig/.mconf.o.d -Wall -Wmissing-prototypes -Wstrict-prototypes -O2 -fomit-frame-pointer -DCURSES_LOC="<ncurses.h>" -DLOCALE -c -o scripts/kconfig/mconf.o scripts/kconfig/mconf.c gcc -o scripts/kconfig/mconf scripts/kconfig/mconf.o scripts/kconfig/zconf.tab.o scripts/kconfig/lxdialog/checklist.o scripts/kconfig/lxdialog/util.o scripts/kconfig/lxdialog/inputbox.o scripts/kconfig/lxdialog/textbox.o scripts/kconfig/lxdialog/yesno.o scripts/kconfig/lxdialog/menubox.o -lncurses scripts/kconfig/mconf Kconfig -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to 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