Re: undefined reference to `exit_curses'

[Thomas Dickey]

On Sat, Jun 20, 2020 at 05:34:47PM -0400, Jeffrey Walton wrote:
> On Sat, Jun 20, 2020 at 4:42 PM Jeffrey Walton <noloader@gmail.com> wrote:
> >
> > Hi Everyone/Thomas,
> >
> > I'm catching this error after upgrading to Ncurses 6.2:
> >
> > gcc -g2 -O2 -march=native -fPIC -pthread  -o background
> > ../obj_s/background.o ../obj_s/dump_window.o
> > -L/home/jwalton/tmp/ok2delete/lib -Wl,-R,'$ORIGIN/../lib'
> > -Wl,-R,/home/jwalton/tmp/ok2delete/lib -Wl,--enable-new-dtags -I. -I.
> > -I../test -DHAVE_CONFIG_H
> > -DDATA_DIR=\"/home/jwalton/tmp/ok2delete/share\" -I. -I../include
> > -I/home/jwalton/tmp/ok2delete/include -DNDEBUG -D_DEFAULT_SOURCE
> > -D_XOPEN_SOURCE=600 -DNDEBUG -g2 -O2 -march=native -fPIC -pthread
> > -fPIC  `echo "-L../lib -lform -lmenu -lpanel -lncurses -ltinfo  -ldl
> > -lpthread" | sed -e 's/-lform.*-lpanel[^ ]*//'` -lutil  -lm
> > ../obj_s/background.o: In function `usage':
> > /home/jwalton/Build-Scripts/ncurses-6.2/test/../test/background.c:153:
> > undefined reference to `exit_curses'
> > ../obj_s/background.o: In function `main':
> > /home/jwalton/Build-Scripts/ncurses-6.2/test/../test/background.c:198:
> > undefined reference to `exit_curses'
> > /home/jwalton/Build-Scripts/ncurses-6.2/test/../test/background.c:240:
> > undefined reference to `exit_curses'
> > collect2: error: ld returned 1 exit status
> 
> The following patch does not help.

exit_curses is declared in include/nc_alloc.h, and used in the ExitProgram
macro which is defined in test/test.priv.h

Lacking that would give a compiler warning (not an error).

The linker error tells you that it's not finding exit_curses in

        ../lib/libncurses.a
        ../lib/libncurses.so, etc
 
> --- test/background.c
> +++ test/background.c
> @@ -35,6 +35,10 @@
>  #include <color_name.h>
>  #include <dump_window.h>
> 
> +#ifdef NO_LEAKS
> +extern NCURSES_EXPORT(void) exit_curses (int) GCC_NORETURN;
> +#endif
> +
>  static int default_bg = COLOR_BLACK;
>  static int default_fg = COLOR_WHITE;
> 
> Jeff
> 

-- 
Thomas E. Dickey <dickey@invisible-island.net>
https://invisible-island.net
ftp://ftp.invisible-island.net

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