Add patch from MINGW (fix #405)

configure.ac

@@ -120,6 +120,16 @@ else
 fi
 AC_SUBST([ISYSTEM])
 
+AC_MSG_CHECKING([for native Win32])
+native_win32=no
+case "$host" in
+  *-*-mingw*)
+    native_win32=yes
+    ;;
+esac
+AC_MSG_RESULT([$native_win32])
+AM_CONDITIONAL(OS_WIN32, test "$native_win32" = yes)
+
 AM_CONDITIONAL([SHLIBS_IN_BINDIR], [case "$host_os" in mingw* | cygwin*) true;; *) false;; esac])
 
 dnl ===========================================================================

lib/Makefile.am

@@ -12,6 +12,9 @@
 # along with this program; if not, see <https://www.gnu.org/licenses/>.
 
 AM_VALAFLAGS = --debug --no-color --vapidir=$(srcdir) --pkg configmake --pkg internal --pkg posix --pkg gnu --pkg gio-2.0 --pkg gmodule-2.0
+if OS_WIN32
+AM_VALAFLAGS += -D OS_WIN32
+endif
 AM_CPPFLAGS = --include config.h -I$(top_srcdir) $(ISYSTEM)$(top_builddir)/libgnu $(ISYSTEM)$(top_srcdir)/libgnu $(GLIB_CFLAGS) $(WARN_CFLAGS) -DG_LOG_DOMAIN='"libenchant"'
 
 # FIXME: Require Vala 0.58 when released, and remove copy of gnu.vapi

lib/broker.vala

@@ -84,6 +84,13 @@ public class EnchantBroker {
 		if (!Module.supported())
 			return;
 
+#if OS_WIN32
+		// gnulib's relocation does not work properly on Win32 without setting
+		// the prefix explicitly.
+		string module_dir = GLib.Win32.get_package_installation_directory_of_module(null);
+		enchant_set_prefix_dir(module_dir);
+#endif
+
 		this.load_providers();
 		this.load_provider_ordering();
 		this.dicts = new GenericSet<EnchantDict>(direct_hash, direct_equal);