build: define first week day in the build script

Calendar is not handling locale correctly, e.g. user’ set language to
English (en-us) and format to Norwegian (nb-no), but Calendar assumes
English format rather than Norwegian.

Calendar code was ready to use the correct format, just like Shell and
GtkCalendar. The issue was in the build script which was setting the
correct locale variable responsible to make that code work.

This patch fixes the build script.

https://bugzilla.gnome.org/show_bug.cgi?id=762428

configure.ac

@@ -26,6 +26,17 @@ AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE,"$GETTEXT_PACKAGE", [GETTEXT package name])
 AS_IF([test "x$USE_NLS" != "xno"],
       [AC_DEFINE([ENABLE_NLS], [1], [Native language support is enabled])])
 
+# _NL_TIME_FIRST_WEEKDAY is an enum and not a define
+AC_MSG_CHECKING([for _NL_TIME_FIRST_WEEKDAY])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <langinfo.h>]],
+                                   [[nl_langinfo(_NL_TIME_FIRST_WEEKDAY);]])],
+               [langinfo_ok=yes], [langinfo_ok=no])
+AC_MSG_RESULT($langinfo_ok)
+if test "$langinfo_ok" = "yes"; then
+  AC_DEFINE([HAVE__NL_TIME_FIRST_WEEKDAY], [1],
+            [Define if _NL_TIME_FIRST_WEEKDAY is available])
+fi
+
 ## don't rerun to this point if we abort
 AC_CACHE_SAVE
 

src/gcal-utils.c

@@ -18,6 +18,8 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "config.h"
+
 #include "gcal-utils.h"
 #include "gcal-event-widget.h"
 #include "gcal-view.h"