Improve MinGW support in Readline

These changes were already accepted upstream in Readline,
but GDB did not yet import a newer Readline version.

readline/Changelog.gdb:

	* util.c: Include rlshell.h.
	(_rl_tropen) [_WIN32 && !__CYGWIN__]: Open the trace file in the
	user's temporary directory.
	* tcap.h [HAVE_NCURSES_TERMCAP_H]: Include ncurses/termcap.h.
	* input.c (w32_isatty) [_WIN32 && !__CYGWIN__]: New function, to
	replace isatty that is not reliable enough on MS-Windows.
	(isatty) [_WIN32 && !__CYGWIN__]: Redirect to w32_isatty.
	(rl_getc): Call _getch, not getch, which could be an ncurses
	function when linked with ncurses, in which case getch will return
	EOF for any keystroke, because there's no curses window.
	* tilde.c (tilde_expand_word) [_WIN32]:
	* histfile.c (history_filename) [_WIN32]: Windows-specific
	environment variable to replace HOME if that is undefined.
	* funmap.c (default_funmap): Compile rl_paste_from_clipboard on
	all Windows platforms, not just Cygwin.
	* readline.h (rl_paste_from_clipboard): Include declaration for
	all Windows platforms.
	* display.c (insert_some_chars, delete_chars): Don't use the
	MinGW-specific code if linked with ncurses.
	* configure.in:
	* config.h.in: Support ncurses/termcap.h.  The configure script
	was updated accordingly.
	* complete.c [_WIN32 && !__CYGWIN__]: Initialize
	_rl_completion_case_fold to 1.
	(printable_part, rl_filename_completion_function)
	[_WIN32 && !__CYGWIN__]: Handle the drive letter.

1 files changed, 17 insertions, 0 deletions

diff --git a/readline/configure b/readline/configure
index 09de45df5e..249ab7bd3e 100755
--- a/readline/configure
+++ b/readline/configure
@@ -5845,6 +5845,23 @@ if test "$TERMCAP_LIB" = "./lib/termcap/libtermcap.a"; then
 	fi
 fi
 
+if test "$TERMCAP_LIB" = "-lncurses"; then
+
+for ac_header in ncurses/termcap.h
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
+eval as_val=\$$as_ac_Header
+   if test "x$as_val" = x""yes; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+fi
 
 for ac_header in wctype.h
 do :