gdb: add --with-curses to --configuration output

'gdb --configuration' does not mention if GDB was built with curses.
Since b5075fb68d4 (Rename to allow_tui_tests, 2023-01-08) it does show
--enable-tui (or --disable-tui), but one might want to know if GDB was
built with curses independently of the availability of the TUI.

Since configure.ac uses AC_SEARCH_LIBS to check for the curses library,
we do not get an automatically defined HAVE_LIBCURSES symbol in
config.in. We do have symbols defined by AC_CHECK_HEADERS
(HAVE_CURSES_H, etc.) but it would be cumbersome to use those in
print_gdb_configuration because we would have to check for all 6 symbols
corresponding the 6 headers listed. This would also increase the
maintenance burden if support for other variations of curses are added.

Instead, define 'HAVE_LIBCURSES' ourselves by adding an
'action-if-found' argument to AC_SEARCH_LIBS, and use it in
print_gdb_configuration.

While at it, remove the condition on 'ac_cv_search_waddstr' and set
'curses_found' directly in 'action-if-found'.

Change-Id: Id90e3d73990e169cee51bcc3e1d52072cfacd5b8
Approved-By: Simon Marchi <simon.marchi@efficios.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/gdb/configure b/gdb/configure
index cfdaf59..6bce5c7 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -20624,13 +20624,13 @@ $as_echo "$ac_cv_search_waddstr" >&6; }
 ac_res=$ac_cv_search_waddstr
 if test "$ac_res" != no; then :
   test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+  curses_found=yes
 
-fi
+$as_echo "#define HAVE_LIBCURSES 1" >>confdefs.h
 
 
-  if test "$ac_cv_search_waddstr" != no; then
-    curses_found=yes
-  fi
+fi
+
 fi
 
 # Check whether we should enable the TUI, but only do so if we really