diff --git a/CMakeLists.txt b/CMakeLists.txt
index e5159b0f..fab76a99 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,10 +30,15 @@ option(GLM_TEST_ENABLE_CXX_98 "Enable C++ 98" OFF)
 option(GLM_TEST_ENABLE_CXX_11 "Enable C++ 11" OFF)
 option(GLM_TEST_ENABLE_CXX_14 "Enable C++ 14" OFF)
 option(GLM_TEST_ENABLE_CXX_17 "Enable C++ 17" OFF)
+option(GLM_TEST_ENABLE_CXX_20 "Enable C++ 20" OFF)
 
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-if(GLM_TEST_ENABLE_CXX_17)
+if(GLM_TEST_ENABLE_CXX_20)
+	set(CMAKE_CXX_STANDARD 20)
+	message(STATUS "GLM: Build with C++20 features")
+
+elseif(GLM_TEST_ENABLE_CXX_17)
 	set(CMAKE_CXX_STANDARD 17)
 	message(STATUS "GLM: Build with C++17 features")
 
diff --git a/glm/detail/glm.cpp b/glm/detail/glm.cpp
index f4224ac0..e9bbc700 100644
--- a/glm/detail/glm.cpp
+++ b/glm/detail/glm.cpp
@@ -1,6 +1,7 @@
 /// @ref core
 /// @file glm/glm.cpp
 
+#define GLM_FORCE_MESSAGES
 #define GLM_ENABLE_EXPERIMENTAL
 #include <glm/glm.hpp>
 #include <glm/ext/vec1.hpp>
diff --git a/glm/detail/setup.hpp b/glm/detail/setup.hpp
index 29401a19..8cba6daf 100644
--- a/glm/detail/setup.hpp
+++ b/glm/detail/setup.hpp
@@ -127,8 +127,9 @@
 #define GLM_LANG_CXX11_FLAG			(1 << 4)
 #define GLM_LANG_CXX14_FLAG			(1 << 5)
 #define GLM_LANG_CXX17_FLAG			(1 << 6)
-#define GLM_LANG_CXXMS_FLAG			(1 << 7)
-#define GLM_LANG_CXXGNU_FLAG		(1 << 8)
+#define GLM_LANG_CXX2A_FLAG			(1 << 7)
+#define GLM_LANG_CXXMS_FLAG			(1 << 8)
+#define GLM_LANG_CXXGNU_FLAG		(1 << 9)
 
 #define GLM_LANG_CXX98			GLM_LANG_CXX98_FLAG
 #define GLM_LANG_CXX03			(GLM_LANG_CXX98 | GLM_LANG_CXX03_FLAG)
@@ -136,6 +137,7 @@
 #define GLM_LANG_CXX11			(GLM_LANG_CXX0X | GLM_LANG_CXX11_FLAG)
 #define GLM_LANG_CXX14			(GLM_LANG_CXX11 | GLM_LANG_CXX14_FLAG)
 #define GLM_LANG_CXX17			(GLM_LANG_CXX14 | GLM_LANG_CXX17_FLAG)
+#define GLM_LANG_CXX2A			(GLM_LANG_CXX17 | GLM_LANG_CXX2A_FLAG)
 #define GLM_LANG_CXXMS			GLM_LANG_CXXMS_FLAG
 #define GLM_LANG_CXXGNU			GLM_LANG_CXXGNU_FLAG
 
@@ -146,14 +148,23 @@
 #endif
 
 #ifdef _MSVC_LANG
-#	if _MSVC_LANG == 201703
-#		define GLM_FORCE_CXX17
-#	elif _MSVC_LANG == 201402
+#	if _MSVC_LANG == 201402
 #		define GLM_FORCE_CXX14
+#	elif _MSVC_LANG == 201703
+#		define GLM_FORCE_CXX17
+#	elif _MSVC_LANG > 201703
+#		define GLM_FORCE_CXX2A
 #	endif
 #endif
 
-#if defined(GLM_FORCE_CXX17)
+#if defined(GLM_FORCE_CXX2A)
+#	if GLM_MESSAGES == GLM_MESSAGES_ENABLED && !defined(GLM_MESSAGE_FORCE_CXX2A_DISPLAYED)
+#		define GLM_MESSAGE_FORCE_CXX2A_DISPLAYED
+#		pragma message("GLM: Force the use of C++2a only")
+#	endif//GLM_MESSAGES
+#	define GLM_LANG (GLM_LANG_CXX2A | GLM_MSC_EXT)
+#	define GLM_LANG_STL11_FORCED
+#elif defined(GLM_FORCE_CXX17)
 #	if GLM_MESSAGES == GLM_MESSAGES_ENABLED && !defined(GLM_MESSAGE_FORCE_CXX17_DISPLAYED)
 #		define GLM_MESSAGE_FORCE_CXX17_DISPLAYED
 #		if (__cplusplus >= 201703L) || ((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_COMPILER >= GLM_COMPILER_VC15_7)) || ((GLM_COMPILER & GLM_COMPILER_GCC) && (GLM_COMPILER >= GLM_COMPILER_GCC80)) || ((GLM_COMPILER & GLM_COMPILER_CLANG) && (GLM_COMPILER >= GLM_COMPILER_CLANG50))
@@ -248,7 +259,6 @@
 #	endif
 #else
 #	define GLM_HAS_CXX11_STL ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (\
-		((GLM_COMPILER & GLM_COMPILER_GCC) && (GLM_COMPILER >= GLM_COMPILER_GCC48)) || \
 		((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_COMPILER >= GLM_COMPILER_VC12)) || \
 		((GLM_PLATFORM != GLM_PLATFORM_WINDOWS) && (GLM_COMPILER & GLM_COMPILER_INTEL) && (GLM_COMPILER >= GLM_COMPILER_INTEL15))))
 #endif
@@ -260,7 +270,6 @@
 #	define GLM_HAS_STATIC_ASSERT 1
 #else
 #	define GLM_HAS_STATIC_ASSERT ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (\
-		((GLM_COMPILER & GLM_COMPILER_GCC)) || \
 		((GLM_COMPILER & GLM_COMPILER_CUDA)) || \
 		((GLM_COMPILER & GLM_COMPILER_VC))))
 #endif
@@ -272,7 +281,6 @@
 #	define GLM_HAS_EXTENDED_INTEGER_TYPE (\
 		((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (GLM_COMPILER & GLM_COMPILER_VC)) || \
 		((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (GLM_COMPILER & GLM_COMPILER_CUDA)) || \
-		((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (GLM_COMPILER & GLM_COMPILER_GCC)) || \
 		((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (GLM_COMPILER & GLM_COMPILER_CLANG)))
 #endif
 
@@ -283,7 +291,6 @@
 #	define GLM_HAS_INITIALIZER_LISTS 1
 #else
 #	define GLM_HAS_INITIALIZER_LISTS ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (\
-		((GLM_COMPILER & GLM_COMPILER_GCC)) || \
 		((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_COMPILER >= GLM_COMPILER_VC12)) || \
 		((GLM_COMPILER & GLM_COMPILER_INTEL) && (GLM_COMPILER >= GLM_COMPILER_INTEL14)) || \
 		((GLM_COMPILER & GLM_COMPILER_CUDA) && (GLM_COMPILER >= GLM_COMPILER_CUDA75))))
@@ -297,8 +304,7 @@
 #else
 #	define GLM_HAS_UNRESTRICTED_UNIONS (GLM_LANG & GLM_LANG_CXX0X_FLAG) && (\
 		(GLM_COMPILER & GLM_COMPILER_VC) || \
-		((GLM_COMPILER & GLM_COMPILER_CUDA) && (GLM_COMPILER >= GLM_COMPILER_CUDA75)) || \
-		((GLM_COMPILER & GLM_COMPILER_GCC) && (GLM_COMPILER >= GLM_COMPILER_GCC46)))
+		((GLM_COMPILER & GLM_COMPILER_CUDA) && (GLM_COMPILER >= GLM_COMPILER_CUDA75)))
 #endif
 
 // N2346
@@ -310,7 +316,6 @@
 #	define GLM_HAS_DEFAULTED_FUNCTIONS 1
 #else
 #	define GLM_HAS_DEFAULTED_FUNCTIONS ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (\
-		((GLM_COMPILER & GLM_COMPILER_GCC)) || \
 		((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_COMPILER >= GLM_COMPILER_VC12)) || \
 		((GLM_COMPILER & GLM_COMPILER_INTEL)) || \
 		(GLM_COMPILER & GLM_COMPILER_CUDA)))
@@ -323,7 +328,6 @@
 #	define GLM_HAS_RVALUE_REFERENCES 1
 #else
 #	define GLM_HAS_RVALUE_REFERENCES ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (\
-		((GLM_COMPILER & GLM_COMPILER_GCC)) || \
 		((GLM_COMPILER & GLM_COMPILER_VC)) || \
 		((GLM_COMPILER & GLM_COMPILER_CUDA))))
 #endif
@@ -335,7 +339,6 @@
 #	define GLM_HAS_EXPLICIT_CONVERSION_OPERATORS 1
 #else
 #	define GLM_HAS_EXPLICIT_CONVERSION_OPERATORS ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (\
-		((GLM_COMPILER & GLM_COMPILER_GCC)) || \
 		((GLM_COMPILER & GLM_COMPILER_INTEL) && (GLM_COMPILER >= GLM_COMPILER_INTEL14)) || \
 		((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_COMPILER >= GLM_COMPILER_VC12)) || \
 		((GLM_COMPILER & GLM_COMPILER_CUDA))))
@@ -349,7 +352,6 @@
 #else
 #	define GLM_HAS_TEMPLATE_ALIASES ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (\
 		((GLM_COMPILER & GLM_COMPILER_INTEL)) || \
-		((GLM_COMPILER & GLM_COMPILER_GCC) && (GLM_COMPILER >= GLM_COMPILER_GCC47)) || \
 		((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_COMPILER >= GLM_COMPILER_VC12)) || \
 		((GLM_COMPILER & GLM_COMPILER_CUDA))))
 #endif
@@ -361,7 +363,6 @@
 #	define GLM_HAS_RANGE_FOR 1
 #else
 #	define GLM_HAS_RANGE_FOR ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (\
-		((GLM_COMPILER & GLM_COMPILER_GCC) && (GLM_COMPILER >= GLM_COMPILER_GCC46)) || \
 		((GLM_COMPILER & GLM_COMPILER_INTEL)) || \
 		((GLM_COMPILER & GLM_COMPILER_VC)) || \
 		((GLM_COMPILER & GLM_COMPILER_CUDA))))
@@ -374,7 +375,6 @@
 #	define GLM_HAS_ALIGNOF 1
 #else
 #	define GLM_HAS_ALIGNOF ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (\
-		((GLM_COMPILER & GLM_COMPILER_GCC) && (GLM_COMPILER >= GLM_COMPILER_GCC48)) || \
 		((GLM_COMPILER & GLM_COMPILER_INTEL) && (GLM_COMPILER >= GLM_COMPILER_INTEL15)) || \
 		((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_COMPILER >= GLM_COMPILER_VC14)) || \
 		((GLM_COMPILER & GLM_COMPILER_CUDA) && (GLM_COMPILER >= GLM_COMPILER_CUDA70))))
@@ -389,7 +389,6 @@
 	// GCC 4.6 support constexpr but there is a compiler bug causing a crash
 	// Visual C++ has a bug #594 https://github.com/g-truc/glm/issues/594
 #	define GLM_HAS_CONSTEXPR_CXX11 ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (GLM_ARCH == GLM_ARCH_PURE) && (\
-		((GLM_COMPILER & GLM_COMPILER_GCC) && (GLM_COMPILER >= GLM_COMPILER_GCC48)) || \
 		((GLM_COMPILER & GLM_COMPILER_INTEL) && (GLM_COMPILER >= GLM_COMPILER_INTEL14)) || \
 		((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_COMPILER >= GLM_COMPILER_VC14))))
 #endif
@@ -407,7 +406,6 @@
 #	define GLM_HAS_CONSTEXPR_CXX14 1
 #else
 #	define GLM_HAS_CONSTEXPR_CXX14 ((GLM_LANG & GLM_LANG_CXX0X_FLAG) && (GLM_ARCH == GLM_ARCH_PURE) && GLM_HAS_INITIALIZER_LISTS && (\
-		((GLM_COMPILER & GLM_COMPILER_GCC) && (GLM_COMPILER >= GLM_COMPILER_GCC50)) || \
 		((GLM_COMPILER & GLM_COMPILER_INTEL) && (GLM_COMPILER >= GLM_COMPILER_INTEL17)) || \
 		((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_COMPILER >= GLM_COMPILER_VC15))))
 #endif
diff --git a/test/core/core_type_mat2x2.cpp b/test/core/core_type_mat2x2.cpp
index 933ca543..059331ce 100644
--- a/test/core/core_type_mat2x2.cpp
+++ b/test/core/core_type_mat2x2.cpp
@@ -157,7 +157,7 @@ int test_size()
 
 int test_constexpr()
 {
-#if GLM_HAS_CONSTEXPR_CXX11
+#if GLM_HAS_CONSTEXPR_CXX14
 	static_assert(glm::mat2x2::length() == 2, "GLM: Failed constexpr");
 #endif
 
diff --git a/test/core/core_type_mat2x3.cpp b/test/core/core_type_mat2x3.cpp
index de98e007..8a35cd10 100644
--- a/test/core/core_type_mat2x3.cpp
+++ b/test/core/core_type_mat2x3.cpp
@@ -122,7 +122,7 @@ int test_size()
 
 int test_constexpr()
 {
-#if GLM_HAS_CONSTEXPR_CXX11
+#if GLM_HAS_CONSTEXPR_CXX14
 	static_assert(glm::mat2x3::length() == 2, "GLM: Failed constexpr");
 #endif
 
diff --git a/test/core/core_type_mat2x4.cpp b/test/core/core_type_mat2x4.cpp
index 50749d22..80575cf0 100644
--- a/test/core/core_type_mat2x4.cpp
+++ b/test/core/core_type_mat2x4.cpp
@@ -124,7 +124,7 @@ static int test_size()
 
 static int test_constexpr()
 {
-#if GLM_HAS_CONSTEXPR_CXX11
+#if GLM_HAS_CONSTEXPR_CXX14
 	static_assert(glm::mat2x4::length() == 2, "GLM: Failed constexpr");
 #endif
 
diff --git a/test/core/core_type_mat3x2.cpp b/test/core/core_type_mat3x2.cpp
index 14a5f1e7..873e1513 100644
--- a/test/core/core_type_mat3x2.cpp
+++ b/test/core/core_type_mat3x2.cpp
@@ -126,7 +126,7 @@ static int test_size()
 
 static int test_constexpr()
 {
-#if GLM_HAS_CONSTEXPR_CXX11
+#if GLM_HAS_CONSTEXPR_CXX14
 	static_assert(glm::mat3x2::length() == 3, "GLM: Failed constexpr");
 #endif
 
diff --git a/test/core/core_type_mat3x3.cpp b/test/core/core_type_mat3x3.cpp
index 609b9dbe..6fc33c9c 100644
--- a/test/core/core_type_mat3x3.cpp
+++ b/test/core/core_type_mat3x3.cpp
@@ -185,7 +185,7 @@ static int test_size()
 
 static int test_constexpr()
 {
-#if GLM_HAS_CONSTEXPR_CXX11
+#if GLM_HAS_CONSTEXPR_CXX14
 	static_assert(glm::mat3x3::length() == 3, "GLM: Failed constexpr");
 
 	GLM_CONSTEXPR_CXX11 glm::mat3x3 const Z(0.0f);
diff --git a/test/core/core_type_mat3x4.cpp b/test/core/core_type_mat3x4.cpp
index 29accacc..85f22708 100644
--- a/test/core/core_type_mat3x4.cpp
+++ b/test/core/core_type_mat3x4.cpp
@@ -128,7 +128,7 @@ static int test_size()
 
 static int test_constexpr()
 {
-#if GLM_HAS_CONSTEXPR_CXX11
+#if GLM_HAS_CONSTEXPR_CXX14
 	static_assert(glm::mat3x4::length() == 3, "GLM: Failed constexpr");
 #endif
 
diff --git a/test/core/core_type_mat4x2.cpp b/test/core/core_type_mat4x2.cpp
index 915505d6..0fa91561 100644
--- a/test/core/core_type_mat4x2.cpp
+++ b/test/core/core_type_mat4x2.cpp
@@ -130,7 +130,7 @@ static int test_size()
 
 static int test_constexpr()
 {
-#if GLM_HAS_CONSTEXPR_CXX11
+#if GLM_HAS_CONSTEXPR_CXX14
 	static_assert(glm::mat4x2::length() == 4, "GLM: Failed constexpr");
 #endif
 
diff --git a/test/core/core_type_mat4x3.cpp b/test/core/core_type_mat4x3.cpp
index 1c8e47f6..0fa30368 100644
--- a/test/core/core_type_mat4x3.cpp
+++ b/test/core/core_type_mat4x3.cpp
@@ -130,7 +130,7 @@ static int test_size()
 
 static int test_constexpr()
 {
-#if GLM_HAS_CONSTEXPR_CXX11
+#if GLM_HAS_CONSTEXPR_CXX14
 	static_assert(glm::mat4x3::length() == 4, "GLM: Failed constexpr");
 #endif
 
diff --git a/test/core/core_type_mat4x4.cpp b/test/core/core_type_mat4x4.cpp
index 6d7d2438..89a4205c 100644
--- a/test/core/core_type_mat4x4.cpp
+++ b/test/core/core_type_mat4x4.cpp
@@ -323,7 +323,7 @@ static int test_constexpr()
 {
 	glm::mat4 const I(1.0f);
 
-#if GLM_HAS_CONSTEXPR_CXX11
+#if GLM_HAS_CONSTEXPR_CXX14
 	static_assert(glm::mat4::length() == 4, "GLM: Failed constexpr");
 #endif