diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9314923..20960c2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,6 +8,12 @@ if (MSVC)
     add_compile_options(/source-charset:utf-8)
 endif()
 
+if (CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND CMAKE_SYSTEM_NAME MATCHES "Windows")
+    MESSAGE(STATUS "Ofen Add MinGW Param.")
+    add_compile_options(-finput-charset=utf-8)
+    add_compile_options(-fexec-charset=gbk)
+endif()
+
 set(CMAKE_DEBUG_POSTFIX "d")
 message(STATUS "System: ${CMAKE_SYSTEM_NAME}")
 message(STATUS "Compiler CXX ID: ${CMAKE_CXX_COMPILER_ID}")
@@ -30,7 +36,6 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin/${CMAKE_BUILD_TYPE}
 add_library(Ofen STATIC ${SRC_FILES})
 target_include_directories(Ofen PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)
 
-
 # ****************************************************************************************
 install(DIRECTORY ${CMAKE_SOURCE_DIR}/include/ DESTINATION ${CMAKE_INSTALL_PREFIX}/include)
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/OfenConfig.cmake DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/cmake/Ofen)
diff --git a/src/of_path.cpp b/src/of_path.cpp
index 9ad65b4..27207f4 100644
--- a/src/of_path.cpp
+++ b/src/of_path.cpp
@@ -73,6 +73,16 @@ ofString COfPath::get_home()
 #if defined(_WIN32)
     ofChar* value = nullptr;
     std::size_t len = 0;
+    // _dupenv_s() 在 Visual Studio 2008 的 CRT （msvcr90） 中引入的，似乎没有进入系统 CRT （msvcrt）。
+    // mingw-w64 GCC 通常默认只链接到系统 CRT，所以所以找不到这个符号。
+
+#if defined(__MINGW32__) || defined(__MINGW64__)
+    ofChar* homedir = getenv("USERPROFILE");
+    if (homedir) {
+        return ofString(homedir);
+    }
+    return ofT("");
+#else
 #ifdef UNICODE_OFSTR
     auto err = _wdupenv_s(&value, &len, ofT("USERPROFILE"));
 #else
@@ -85,6 +95,7 @@ ofString COfPath::get_home()
     } else {
         return ofT("");
     }
+#endif
 #else
     ofChar* homedir = getenv("HOME");
     if (homedir) {
diff --git a/src/of_util.cpp b/src/of_util.cpp
index 055bac2..e355241 100644
--- a/src/of_util.cpp
+++ b/src/of_util.cpp
@@ -32,7 +32,11 @@ void CMutBuffer::remove_of(int start_pos, int len)
         return;
     }
 #ifdef _WIN32
+#if defined(__MINGW32__) || defined(__MINGW64__)
+    auto end_pos = std::min(start_pos + len, static_cast<int>(buffer_.size()));
+#else
     auto end_pos = min(start_pos + len, static_cast<int>(buffer_.size()));
+#endif
 #else
     auto end_pos = std::min(start_pos + len, static_cast<int>(buffer_.size()));
 #endif