--- misc/liblangtag-0.4.0/configure.ac
+++ misc/build/liblangtag-0.4.0/configure.ac
@@ -173,8 +173,9 @@
 __sync_synchronize();
 j = __sync_fetch_and_sub(&i, 1);
 return j;
-       ]])], [AC_MSG_ERROR([liblangtag has to be built with -march=i486 or later.])]
-       [lt_cv_has_atomic=no])])
+       ]])], [AC_MSG_ERROR([liblangtag has to be built with -march=i486 or later.])],
+       [lt_cv_has_atomic=no
+        CFLAGS="$_save_cflags"])])
 ])
 if test "x$lt_cv_has_atomic" = "xyes"; then
 	AC_DEFINE(LT_HAVE_ATOMIC_BUILTINS, 1, [Have buit-in atomic functions])
@@ -291,8 +291,14 @@
 dnl ======================================================================
 dnl check another libraries
 dnl ======================================================================
+case $host_os in
+  cygwin* | mingw*)
+    ;;
-AX_PTHREAD([],
+  *)
+    AX_PTHREAD([],
 	[AC_MSG_ERROR([*** pthread library are required])])
+    ;;
+esac
 
 GOBJECT_INTROSPECTION_CHECK([1.30.0])
 if test "x$enable_introspection" != "xyes"; then
--- misc/liblangtag-0.4.0/configure
+++ misc/build/liblangtag-0.4.0/configure
@@ -12607,7 +12607,9 @@
 _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
   as_fn_error $? "liblangtag has to be built with -march=i486 or later." "$LINENO" 5
+else
        lt_cv_has_atomic=no
+       CFLAGS="$_save_cflags"
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
@@ -13203,6 +13203,10 @@
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
+case $host_os in
+  cygwin* | mingw*)
+    ;;
+  *)
 ax_pthread_ok=no
 
 # We used to check for pthread.h first, but this fails if pthread.h
@@ -13584,6 +13584,8 @@
         ax_pthread_ok=no
         as_fn_error $? "*** pthread library are required" "$LINENO" 5
 fi
+;;
+esac
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
--- misc/liblangtag-0.4.0/liblangtag/lt-macros.h
+++ misc/build/liblangtag-0.4.0/liblangtag/lt-macros.h
@@ -14,7 +14,9 @@
 #error "Only <liblangtag/langtag.h> can be included directly."
 #endif
 
+#ifndef _WIN32
 #include <sys/param.h>
+#endif
 
 #ifndef __LT_MACROS_H__
 #define __LT_MACROS_H__
@@ -206,6 +206,14 @@
 
 LT_BEGIN_DECLS
 
+#ifdef _MSC_VER
+#ifdef _M_AMD64
+typedef signed long long ssize_t;
+#else
+typedef signed int ssize_t;
+#endif
+#endif
+
 typedef void *		lt_pointer_t;
 typedef int		lt_bool_t;
 typedef lt_pointer_t (* lt_copy_func_t)	(lt_pointer_t data);
--- misc/liblangtag-0.4.0/liblangtag/lt-atomic.h
+++ misc/build/liblangtag-0.4.0/liblangtag/lt-atomic.h
@@ -17,7 +17,11 @@
 #include "config.h"
 #endif
 
+#if !defined(LT_HAVE_ATOMIC_BUILTINS) && !defined(_WIN32)
 #include <pthread.h>
+#elif defined(_WIN32)
+#include <windows.h>
+#endif
 #include "lt-messages.h"
 
 LT_BEGIN_DECLS
@@ -26,14 +30,40 @@
 LT_INLINE_FUNC int       lt_atomic_int_inc         (volatile int *v);
 LT_INLINE_FUNC lt_bool_t lt_atomic_int_dec_and_test(volatile int *v);
 
-#ifndef LT_HAVE_ATOMIC_BUILTINS
+#if !defined(LT_HAVE_ATOMIC_BUILTINS) && !defined(_WIN32)
 static pthread_mutex_t __lt_atomic_lock = PTHREAD_MUTEX_INITIALIZER;
 #endif
 
 /*< private >*/
 
 /*< public >*/
-#ifdef LT_HAVE_ATOMIC_BUILTINS
+#ifdef _WIN32
+LT_INLINE_FUNC int
+lt_atomic_int_get(volatile int *v)
+{
+       lt_return_val_if_fail (v != NULL, 0);
+
+       return (int)InterlockedExchangeAdd((LONG*)v, 0);
+}
+
+LT_INLINE_FUNC int
+lt_atomic_int_inc(volatile int *v)
+{
+       lt_return_val_if_fail (v != NULL, 0);
+
+       return (int)InterlockedExchangeAdd((LONG*)v, 1) + 1;
+}
+
+lt_bool_t
+lt_atomic_int_dec_and_test(volatile int *v)
+{
+       lt_return_val_if_fail (v != NULL, FALSE);
+
+       return 1 == InterlockedExchangeAdd((LONG*)v, -1) - 1;
+}
+
+
+#elif defined(LT_HAVE_ATOMIC_BUILTINS)
 LT_INLINE_FUNC int
 lt_atomic_int_get(volatile int *v)
 {
--- misc/liblangtag-0.4.0/liblangtag/lt-messages.h
+++ misc/build/liblangtag-0.4.0/liblangtag/lt-messages.h
@@ -298,10 +298,17 @@
 	_lt_return_after_eval_if_fail(__expr__,__eval__)
 #define lt_return_val_after_eval_if_fail(__expr__,__val__,__eval__)	\
 	_lt_return_val_after_eval_if_fail(__expr__,__val__,__eval__)
+#ifdef __GNUC__
 #define lt_warn_if_reached()						\
 	lt_message_printf(LT_MSG_WARNING, LT_MSG_FLAG_NONE, 0,		\
 			  "(%s:%d): %s: code should not be reached",	\
 			  __FILE__, __LINE__, __PRETTY_FUNCTION__)
+#else
+#define lt_warn_if_reached()						\
+	lt_message_printf(LT_MSG_WARNING, LT_MSG_FLAG_NONE, 0,		\
+			  "(%s:%d): code should not be reached",	\
+			  __FILE__, __LINE__)
+#endif
 
 LT_END_DECLS
 
--- misc/liblangtag-0.4.0/liblangtag/lt-error.c
+++ misc/build/liblangtag-0.4.0/liblangtag/lt-error.c
@@ -14,7 +14,9 @@
 #include "config.h"
 #endif
 
+#ifndef _WIN32
 #include <execinfo.h>
+#endif
 #include <stdlib.h>
 #include "lt-list.h"
 #include "lt-mem.h"
@@ -120,9 +120,13 @@
 	d->message = lt_strdup_vprintf(message, ap);
 	va_end(ap);
 
+#ifdef _WIN32
+	size = 0;
+#else
 	size = backtrace(traces, 1024);
 	if (size > 0)
 		d->traces = backtrace_symbols(traces, size);
+#endif
 	d->stack_size = size;
 
 	lt_mem_add_ref(&d->parent, d->message, free);
--- misc/liblangtag-0.4.0/liblangtag/lt-ext-module.c
+++ misc/build/liblangtag-0.4.0/liblangtag/lt-ext-module.c
@@ -15,11 +15,15 @@
 #endif
 
 #include <ctype.h>
+#ifdef ENABLE_MODULE
 #include <dirent.h>
+#endif
 #ifdef HAVE_DLFCN_H
 #include <dlfcn.h>
 #endif
+#ifndef _WIN32
 #include <libgen.h>
+#endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
--- misc/liblangtag-0.4.0/liblangtag/lt-xml.c
+++ misc/build/liblangtag-0.4.0/liblangtag/lt-xml.c
@@ -14,7 +14,11 @@
 #include "config.h"
 #endif
 
+#ifndef _WIN32
 #include <pthread.h>
+#else
+#include <windows.h>
+#endif
 #include <sys/stat.h>
 #include <libxml/parser.h>
 #include <libxml/xpath.h>
@@ -40,7 +44,9 @@
 };
 
 static lt_xml_t *__xml = NULL;
+#ifndef _WIN32
 static pthread_mutex_t __lt_xml_lock = PTHREAD_MUTEX_INITIALIZER;
+#endif
 
 /*< private >*/
 static lt_bool_t
@@ -309,11 +315,18 @@
 {
 	lt_error_t *err = NULL;
 
+#ifdef _WIN32
+       HANDLE __lt_xml_lock = CreateMutex(NULL, FALSE, NULL);
+#else
 	pthread_mutex_lock(&__lt_xml_lock);
+#endif
 
 	if (__xml) {
+#ifdef _WIN32
+		ReleaseMutex(__lt_xml_lock);
+#else
 		pthread_mutex_unlock(&__lt_xml_lock);
-
+#endif
 		return lt_xml_ref(__xml);
 	}
 
@@ -389,8 +402,11 @@
 		lt_xml_unref(__xml);
 	}
 
+#ifdef _WIN32
+	ReleaseMutex(__lt_xml_lock);
+#else
 	pthread_mutex_unlock(&__lt_xml_lock);
-
+#endif
 	return __xml;
 }
 
--- misc/liblangtag-0.4.0/liblangtag/lt-messages.c
+++ misc/build/liblangtag-0.4.0/liblangtag/lt-messages.c
@@ -17,7 +17,9 @@
 #include "config.h"
 #endif
 
+#ifndef _WIN32
 #include <execinfo.h>
+#endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -98,6 +98,7 @@
 static void
 _lt_message_stacktrace(void)
 {
+#ifndef _WIN32
 	void *traces[1024];
 	char **strings;
 	int size, i;
@@ -119,6 +119,7 @@
 		}
 		free(strings);
 	}
+#endif
 }
 
 static void
--- misc/liblangtag-0.4.0/liblangtag/lt-string.c
+++ misc/build/liblangtag-0.4.0/liblangtag/lt-string.c
@@ -302,8 +302,10 @@
 	lt_return_val_if_fail (string != NULL, NULL);
 	lt_return_val_if_fail (path != NULL, string);
 
+#ifndef _WIN32
 	if (lt_string_length(string) == 0 && path[0] != LT_DIR_SEPARATOR)
 		lt_string_append(string, LT_DIR_SEPARATOR_S);
+#endif
 
 	va_start(ap, path);
 	p = path;
--- misc/liblangtag-0.4.0/liblangtag/lt-tag.c
+++ misc/build/liblangtag-0.4.0/liblangtag/lt-tag.c
@@ -15,9 +15,15 @@
 #endif
 
 #include <ctype.h>
+#ifndef _WIN32
 #include <langinfo.h>
+#endif
 #include <locale.h>
+#ifndef HAVE_STDINT_H
+typedef int int32_t;
+#else
 #include <stdint.h>
+#endif
 #include <string.h>
 #include <libxml/xpath.h>
 #include "lt-database.h"