[gdb/build] Fix build without ncurses in maintenance_info_screen

With a build without ncurses we run into:
...
src/gdb/utils.c: In function ‘void maintenance_info_screen(const char*, int)’:
src/gdb/utils.c:1310:7: error: ‘COLS’ was not declared in this scope
       COLS);
       ^~~~
src/gdb/utils.c:1331:8: error: ‘LINES’ was not declared in this scope
        LINES);
        ^~~~~
...

Fix this by using HAVE_LIBCURSES.

Tested on x86_64-linux.

PR build/30391
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30391

diff --git a/gdb/utils.c b/gdb/utils.c
index b5bb84ce85dbd2fbc2411db2b473698867e0626c..002a5885aff6a096c2e2621dd042b6925603fba3 100644 (file)
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -1304,10 +1304,12 @@ maintenance_info_screen (const char *args, int from_tty)
                  ? " (unlimited - 1)"
                  : "")));
 
+#ifdef HAVE_LIBCURSES
   gdb_printf (gdb_stdout,
             _("Number of characters curses thinks "
               "are in a line is %d.\n"),
             COLS);
+#endif
 
   gdb_printf (gdb_stdout,
              _("Number of characters environment thinks "
@@ -1325,10 +1327,12 @@ maintenance_info_screen (const char *args, int from_tty)
              rows,
              rows == sqrt_int_max ? " (unlimited)" : "");
 
+#ifdef HAVE_LIBCURSES
   gdb_printf (gdb_stdout,
             _("Number of lines curses thinks "
               "are in a page is %d.\n"),
              LINES);
+#endif
 
   gdb_printf (gdb_stdout,
              _("Number of lines environment thinks "