diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..86cdf53
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,47 @@
+# find your Generators: 
+#   cmd: cmake -G
+
+# example, system default Generators, linux=gcc, windows=msvc:
+#   cd L:\0_cpp_plus\base64
+#   mkdir L:\0_cpp_plus\base64\build
+#   cd L:\0_cpp_plus\base64\build
+#   cmake ..
+#   cmake --build . --config Release
+# lib path: 
+
+# example, minGW: 
+#   cd L:\0_cpp_plus\base64
+#   mkdir L:\0_cpp_plus\base64\gcc
+#   cd L:\0_cpp_plus\base64\gcc
+#   cmake  -G "MinGW Makefiles" ..
+#   cmake --build . --config Release 
+# lib path: L:\0_cpp_plus\base64\gcc\libbase64.a
+
+# example, msvc: 
+#   cd L:\0_cpp_plus\base64
+#   mkdir L:\0_cpp_plus\base64\msvc
+#   cd L:\0_cpp_plus\base64\msvc
+#   cmake -G "Visual Studio 16 2019" ..
+#   cmake --build . --config Release 
+# lib path: L:\0_cpp_plus\base64\msvc\Release\base64.lib
+
+
+cmake_minimum_required(VERSION 3.8)
+project(base64 VERSION 0.1.0)
+set(CMAKE_VERBOSE_MAKEFILE ON)
+
+set(CMAKE_CXX_STANDARD_REQUIRED 11)
+set(CMAKE_CXX_STANDARD 17)
+
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+    add_compile_options("/utf-8")
+    add_compile_options("/O2")
+elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+    add_compile_options("-O3")
+endif()
+
+include_directories(${PROJECT_SOURCE_DIR})
+add_library(base64 base64.cpp)
+
+message("project dir: ${PROJECT_SOURCE_DIR}")
+
diff --git a/base64.cpp b/base64.cpp
index 5643135..dd367fe 100644
--- a/base64.cpp
+++ b/base64.cpp
@@ -228,7 +228,7 @@ std::string base64_encode_mime(std::string const& s) {
    return encode_mime(s);
 }
 
-#if __cplusplus >= 201703L
+#if (__cplusplus >= 201703L) || (_MSC_VER >= 1910)
 //
 // Interface with std::string_view rather than const std::string&
 // Requires C++17
@@ -251,4 +251,4 @@ std::string base64_decode(std::string_view s, bool remove_linebreaks) {
    return decode(s, remove_linebreaks);
 }
 
-#endif  // __cplusplus >= 201703L
+#endif // (__cplusplus >= 201703L) || (_MSC_VER >= 1910)
diff --git a/base64.h b/base64.h
index 09f75a8..1af71c1 100644
--- a/base64.h
+++ b/base64.h
@@ -8,9 +8,9 @@
 
 #include <string>
 
-#if __cplusplus >= 201703L
+#if (__cplusplus >= 201703L) || (_MSC_VER >= 1910)
 #include <string_view>
-#endif  // __cplusplus >= 201703L
+#endif  // (__cplusplus >= 201703L) || (_MSC_VER >= 1910)
 
 std::string base64_encode     (std::string const& s, bool url = false);
 std::string base64_encode_pem (std::string const& s);
@@ -19,7 +19,7 @@ std::string base64_encode_mime(std::string const& s);
 std::string base64_decode(std::string const& s, bool remove_linebreaks = false);
 std::string base64_encode(unsigned char const*, size_t len, bool url = false);
 
-#if __cplusplus >= 201703L
+#if (__cplusplus >= 201703L) || (_MSC_VER >= 1910)
 //
 // Interface with std::string_view rather than const std::string&
 // Requires C++17
@@ -30,6 +30,6 @@ std::string base64_encode_pem (std::string_view s);
 std::string base64_encode_mime(std::string_view s);
 
 std::string base64_decode(std::string_view s, bool remove_linebreaks = false);
-#endif  // __cplusplus >= 201703L
+#endif  // (__cplusplus >= 201703L) || (_MSC_VER >= 1910)
 
 #endif /* BASE64_H_C0CE2A47_D10E_42C9_A27C_C883944E704A */