diff --git a/build/cmake_env.inc b/build/cmake_env.inc
index 897e344f..757a2ee8 100644
--- a/build/cmake_env.inc
+++ b/build/cmake_env.inc
@@ -18,10 +18,10 @@ IF ("${CMAKE_SYSTEM_NAME}" MATCHES "Linux")
 ELSEIF ("${CMAKE_SYSTEM_NAME}" MATCHES "Windows")
   SET(OS_WINDOWS TRUE)
   MESSAGE(STATUS " Target OS:    WINDOWS")
-ELSEIF (("${CMAKE_SYSTEM_NAME}" MATCHES "MSYS") OR ("${CMAKE_SYSTEM_NAME}" MATCHES "MINGW32"))
+ELSEIF (("${CMAKE_SYSTEM_NAME}" MATCHES "MINGW32") OR  ("${CMAKE_SYSTEM_NAME}" MATCHES "MINGW64"))
   SET(OS_WINDOWS TRUE)
   SET(ENV_MINGW TRUE)
-  MESSAGE(STATUS " Target OS:    WINDOWS with MINGW")
+  MESSAGE(STATUS " Target OS:    WINDOWS with MINGW32/64")
 ELSE ()
   MESSAGE(STATUS " Target OS:    unknown ${CMAKE_SYSTEM_NAME}")
   EXIT ()
diff --git a/build/cmake_var.inc b/build/cmake_var.inc
new file mode 100644
index 00000000..89468d9f
--- /dev/null
+++ b/build/cmake_var.inc
@@ -0,0 +1,53 @@
+
+MESSAGE(STATUS "ANDROID                                  " ${CMAKE_LIBRARY_ARCHITECTURE_REGEX})
+MESSAGE(STATUS "APPLE                                    " ${ANDROID})
+MESSAGE(STATUS "BORLAND                                  " ${APPLE})
+MESSAGE(STATUS "BSD                                      " ${BORLAND})
+MESSAGE(STATUS "CMAKE_ANDROID_NDK_VERSION                " ${BSD})
+MESSAGE(STATUS "CMAKE_CL_64                              " ${CMAKE_ANDROID_NDK_VERSION})
+MESSAGE(STATUS "CMAKE_COMPILER_2005                      " ${CMAKE_CL_64})
+MESSAGE(STATUS "CMAKE_HOST_APPLE                         " ${CMAKE_COMPILER_2005})
+MESSAGE(STATUS "CMAKE_HOST_BSD                           " ${CMAKE_HOST_APPLE})
+MESSAGE(STATUS "CMAKE_HOST_LINUX                         " ${CMAKE_HOST_BSD})
+MESSAGE(STATUS "CMAKE_HOST_SOLARIS                       " ${CMAKE_HOST_LINUX})
+MESSAGE(STATUS "CMAKE_HOST_SYSTEM                        " ${CMAKE_HOST_SOLARIS})
+MESSAGE(STATUS "CMAKE_HOST_SYSTEM_NAME                   " ${CMAKE_HOST_SYSTEM})
+MESSAGE(STATUS "CMAKE_HOST_SYSTEM_PROCESSOR              " ${CMAKE_HOST_SYSTEM_NAME})
+MESSAGE(STATUS "CMAKE_HOST_SYSTEM_VERSION                " ${CMAKE_HOST_SYSTEM_PROCESSOR})
+MESSAGE(STATUS "CMAKE_HOST_UNIX                          " ${CMAKE_HOST_SYSTEM_VERSION})
+MESSAGE(STATUS "CMAKE_HOST_WIN32                         " ${CMAKE_HOST_UNIX})
+MESSAGE(STATUS "CMAKE_LIBRARY_ARCHITECTURE               " ${CMAKE_HOST_WIN32})
+MESSAGE(STATUS "CMAKE_LIBRARY_ARCHITECTURE_REGEX         " ${CMAKE_LIBRARY_ARCHITECTURE})
+MESSAGE(STATUS "CMAKE_OBJECT_PATH_MAX                    " ${CMAKE_OBJECT_PATH_MAX})
+MESSAGE(STATUS "CMAKE_SYSTEM                             " ${CMAKE_SYSTEM})
+MESSAGE(STATUS "CMAKE_SYSTEM_NAME                        " ${CMAKE_SYSTEM_NAME})
+MESSAGE(STATUS "CMAKE_SYSTEM_PROCESSOR                   " ${CMAKE_SYSTEM_PROCESSOR})
+MESSAGE(STATUS "CMAKE_SYSTEM_VERSION                     " ${CMAKE_SYSTEM_VERSION})
+MESSAGE(STATUS "CYGWIN                                   " ${CYGWIN})
+MESSAGE(STATUS "GHSMULTI                                 " ${GHSMULTI})
+MESSAGE(STATUS "IOS                                      " ${IOS})
+MESSAGE(STATUS "LINUX                                    " ${LINUX})
+MESSAGE(STATUS "MINGW                                    " ${MINGW})
+MESSAGE(STATUS "MSVC                                     " ${MSVC})
+MESSAGE(STATUS "MSVC10                                   " ${MSVC10})
+MESSAGE(STATUS "MSVC11                                   " ${MSVC11})
+MESSAGE(STATUS "MSVC12                                   " ${MSVC12})
+MESSAGE(STATUS "MSVC14                                   " ${MSVC14})
+MESSAGE(STATUS "MSVC60                                   " ${MSVC60})
+MESSAGE(STATUS "MSVC70                                   " ${MSVC70})
+MESSAGE(STATUS "MSVC71                                   " ${MSVC71})
+MESSAGE(STATUS "MSVC80                                   " ${MSVC80})
+MESSAGE(STATUS "MSVC90                                   " ${MSVC90})
+MESSAGE(STATUS "MSVC_IDE                                 " ${MSVC_IDE})
+MESSAGE(STATUS "MSVC_TOOLSET_VERSION                     " ${MSVC_TOOLSET_VERSION})
+MESSAGE(STATUS "MSVC_VERSION                             " ${MSVC_VERSION})
+MESSAGE(STATUS "MSYS                                     " ${MSYS})
+MESSAGE(STATUS "UNIX                                     " ${UNIX})
+MESSAGE(STATUS "WIN32                                    " ${WIN32})
+MESSAGE(STATUS "WINCE                                    " ${WINCE})
+MESSAGE(STATUS "WINDOWS_PHONE                            " ${WINDOWS_PHONE})
+MESSAGE(STATUS "WINDOWS_STORE                            " ${WINDOWS_STORE})
+MESSAGE(STATUS "XCODE                                    " ${XCODE})
+MESSAGE(STATUS "XCODE_VERSION                            " ${XCODE_VERSION})
+
+
diff --git a/gear-lib/CMakeLists.txt b/gear-lib/CMakeLists.txt
index 698f321d..34776fbd 100644
--- a/gear-lib/CMakeLists.txt
+++ b/gear-lib/CMakeLists.txt
@@ -9,7 +9,9 @@ ENDIF ()
 
 SET(POSIX_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/libposix/)
 IF (DEFINED OS_WINDOWS)
-IF (NOT DEFINED ENV_MINGW)
+IF (DEFINED ENV_MINGW)
+add_compile_definitions(ENV_MINGW=true)
+ELSE ()
 LIST(APPEND POSIX_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/libposix/pthreads4w/)
 LIST(APPEND POSIX_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/libposix/MsvcLibX/include/)
 ENDIF ()
diff --git a/gear-lib/libposix/CMakeLists.txt b/gear-lib/libposix/CMakeLists.txt
index 574c3cbf..001c649a 100644
--- a/gear-lib/libposix/CMakeLists.txt
+++ b/gear-lib/libposix/CMakeLists.txt
@@ -9,7 +9,9 @@ IF (DEFINED OS_LINUX)
 LIST(APPEND SOURCE_FILES libposix4nix.c)
 ELSEIF (DEFINED OS_WINDOWS)
 
-IF (NOT DEFINED ENV_MINGW)
+IF (DEFINED ENV_MINGW)
+add_compile_definitions(ENV_MINGW=true)
+ELSE ()
 INCLUDE_DIRECTORIES(pthreads4w/ MsvcLibX/include)
 AUX_SOURCE_DIRECTORY(MsvcLibX MSVCLIBX_SRC)
 LIST(APPEND PTHREADS4W_SRC pthreads4w/pthread.c)
diff --git a/gear-lib/libposix/libposix.h b/gear-lib/libposix/libposix.h
index aeee52c7..0967c083 100644
--- a/gear-lib/libposix/libposix.h
+++ b/gear-lib/libposix/libposix.h
@@ -28,21 +28,25 @@ extern "C" {
 
 #define LIBPOSIX_VERSION "0.1.1"
 
+/******************************************************************************
+ * OS_WINDOWS
+ * support MSVC, msys2, mingw32/64 on Windows
+ ******************************************************************************/
+#if defined (__WIN32__) || defined (WIN32) || defined (_MSC_VER) || defined (ENV_MINGW)
+#define OS_WINDOWS
+#define GEAR_API __declspec(dllexport)
+#include "libposix4win.h"
+
+
 /******************************************************************************
  * OS_LINUX
+ * support UNIX on Linux
  ******************************************************************************/
-#if defined (__linux__) || defined (__CYGWIN__)
+#elif defined (__linux__) /* || defined (__CYGWIN__) */
 #define OS_LINUX
 #define GEAR_API __attribute__((visibility("default")))
 #include "libposix4nix.h"
 
-/******************************************************************************
- * OS_WINDOWS
- ******************************************************************************/
-#elif defined (__WIN32__) || defined (WIN32) || defined (_MSC_VER)
-#define OS_WINDOWS
-#define GEAR_API __declspec(dllexport)
-#include "libposix4win.h"
 
 /******************************************************************************
  * OS_APPLE
diff --git a/gear-lib/libposix/libposix4win.h b/gear-lib/libposix/libposix4win.h
index 5487691b..79df9956 100644
--- a/gear-lib/libposix/libposix4win.h
+++ b/gear-lib/libposix/libposix4win.h
@@ -22,18 +22,23 @@
 #ifndef LIBPOSIX4WIN_H
 #define LIBPOSIX4WIN_H
 
+#ifndef ENV_MINGW
 #include "msvclibx.h"
+#endif
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
 #include <string.h>
 #include <stdbool.h>
-#include <windows.h>
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #include <tlhelp32.h>
+#include <windows.h>
+#ifndef ENV_MINGW
 #include "pthreads4w/pthread.h"
 #include "pthreads4w/semaphore.h"
+#endif
 #include "kernel_list_win32.h"
 
 #ifdef __cplusplus