From 6a19a30372cca7c252afcf6adbb31b6e9ecdee9b Mon Sep 17 00:00:00 2001
From: Jonas Fonseca <fonseca@diku.dk>
Date: Wed, 19 Mar 2008 21:40:26 +0100
Subject: [PATCH] Make configure search for the ncursesw library first

Also (unconditionally) define _XOPEN_SOURCE_EXTENDED before including
curses.h to have extended functions as recommended by ncurses(3).
---
 configure.ac | 11 ++++++++++-
 tig.c        |  3 +++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 422039e..65b5af3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,11 +1,14 @@
 AC_INIT([tig], [0],
 	[Jonas Fonseca <fonseca@diku.dk>],
 	[tig])
+
 AC_LANG([C])
 AC_CONFIG_HEADER(config.h)
 AC_CONFIG_SRCDIR(tig.c)
 
-AC_SEARCH_LIBS([wclear], [ncurses curses])
+AC_SEARCH_LIBS([wclear], [ncursesw ncurses curses], [],
+	       [AC_ERROR([curses not found])])
+
 AM_ICONV
 
 AC_PROG_CC
@@ -21,3 +24,9 @@ AC_CHECK_PROGS(DOCBOOK2PDF, [docbook2pdf false])
 
 AC_CONFIG_FILES([config.make])
 AC_OUTPUT
+
+case "$LIBS" in
+*-lncursesw*) ;;
+*) AC_MSG_RESULT([NOTE: The found ncurses library does not support wide-char.])
+   AC_MSG_RESULT([NOTE: This means that tig will not correctly render UTF-8])
+esac
diff --git a/tig.c b/tig.c
index fcbf93c..81bc52b 100644
--- a/tig.c
+++ b/tig.c
@@ -42,6 +42,9 @@
 #include <langinfo.h>
 #include <iconv.h>
 
+/* ncurses(3): Must be defined to have extended wide-character functions. */
+#define _XOPEN_SOURCE_EXTENDED
+
 #include <curses.h>
 
 #if __GNUC__ >= 3
-- 
2.30.2