diff --git a/glm/detail/type_mat2x2.hpp b/glm/detail/type_mat2x2.hpp
index 1d64c0593..82e68d845 100644
--- a/glm/detail/type_mat2x2.hpp
+++ b/glm/detail/type_mat2x2.hpp
@@ -34,44 +34,44 @@ namespace glm
 
 		// -- Constructors --
 
-		GLM_FUNC_DECL mat() GLM_DEFAULT;
-		GLM_FUNC_DECL mat(mat<2, 2, T, Q> const& m) GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat() GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 2, T, Q> const& m) GLM_DEFAULT;
 		template<qualifier P>
-		GLM_FUNC_DECL mat(mat<2, 2, T, P> const& m);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 2, T, P> const& m);
 
-		GLM_FUNC_DECL explicit mat(T scalar);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL explicit GLM_CONSTEXPR_CTOR_CXX14 mat(T scalar);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			T const& x1, T const& y1,
 			T const& x2, T const& y2);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			col_type const& v1,
 			col_type const& v2);
 
 		// -- Conversions --
 
 		template<typename U, typename V, typename M, typename N>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			U const& x1, V const& y1,
 			M const& x2, N const& y2);
 
 		template<typename U, typename V>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			vec<2, U, Q> const& v1,
 			vec<2, V, Q> const& v2);
 
 		// -- Matrix conversions --
 
 		template<typename U, qualifier P>
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 2, U, P> const& m);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 2, U, P> const& m);
 
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 3, T, Q> const& x);
 
 		// -- Unary arithmetic operators --
 
diff --git a/glm/detail/type_mat2x2.inl b/glm/detail/type_mat2x2.inl
index 011344bf0..7eea2cbe4 100644
--- a/glm/detail/type_mat2x2.inl
+++ b/glm/detail/type_mat2x2.inl
@@ -9,13 +9,13 @@ namespace glm
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat()
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat()
 		{}
 #	endif
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(mat<2, 2, T, Q> const& m)
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(mat<2, 2, T, Q> const& m)
 		{
 			this->value[0] = m.value[0];
 			this->value[1] = m.value[1];
@@ -24,21 +24,21 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<qualifier P>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(mat<2, 2, T, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(mat<2, 2, T, P> const& m)
 	{
 		this->value[0] = m.value[0];
 		this->value[1] = m.value[1];
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(T scalar)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(T scalar)
 	{
 		this->value[0] = col_type(scalar, 0);
 		this->value[1] = col_type(0, scalar);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat 
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat 
 	(
 		T const& x0, T const& y0,
 		T const& x1, T const& y1
@@ -49,7 +49,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(col_type const& v0, col_type const& v1)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(col_type const& v0, col_type const& v1)
 	{
 		this->value[0] = v0;
 		this->value[1] = v1;
@@ -59,7 +59,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<typename X1, typename Y1, typename X2, typename Y2>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat 
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat 
 	(
 		X1 const& x1, Y1 const& y1,
 		X2 const& x2, Y2 const& y2
@@ -71,7 +71,7 @@ namespace glm
 	
 	template<typename T, qualifier Q>
 	template<typename V1, typename V2>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(vec<2, V1, Q> const& v1, vec<2, V2, Q> const& v2)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(vec<2, V1, Q> const& v1, vec<2, V2, Q> const& v2)
 	{
 		this->value[0] = col_type(v1);
 		this->value[1] = col_type(v2);
@@ -81,63 +81,63 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<typename U, qualifier P>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(mat<2, 2, U, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(mat<2, 2, U, P> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(mat<3, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(mat<3, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(mat<4, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(mat<4, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(mat<2, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(mat<2, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(mat<3, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(mat<3, 2, T, Q> const& m)
 	{
 		this->value[0] = m[0];
 		this->value[1] = m[1];
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(mat<2, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(mat<2, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(mat<4, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(mat<4, 2, T, Q> const& m)
 	{
 		this->value[0] = m[0];
 		this->value[1] = m[1];
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(mat<3, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(mat<3, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 2, T, Q>::mat(mat<4, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 2, T, Q>::mat(mat<4, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
diff --git a/glm/detail/type_mat2x3.hpp b/glm/detail/type_mat2x3.hpp
index 8f3e4feb0..c74d1a5c7 100644
--- a/glm/detail/type_mat2x3.hpp
+++ b/glm/detail/type_mat2x3.hpp
@@ -35,44 +35,44 @@ namespace glm
 
 		// -- Constructors --
 
-		GLM_FUNC_DECL mat() GLM_DEFAULT;
-		GLM_FUNC_DECL mat(mat<2, 3, T, Q> const& m) GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat() GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 3, T, Q> const& m) GLM_DEFAULT;
 		template<qualifier P>
-		GLM_FUNC_DECL mat(mat<2, 3, T, P> const& m);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 3, T, P> const& m);
 
-		GLM_FUNC_DECL explicit mat(T scalar);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL explicit GLM_CONSTEXPR_CTOR_CXX14 mat(T scalar);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			T x0, T y0, T z0,
 			T x1, T y1, T z1);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			col_type const& v0,
 			col_type const& v1);
 
 		// -- Conversions --
 
 		template<typename X1, typename Y1, typename Z1, typename X2, typename Y2, typename Z2>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			X1 x1, Y1 y1, Z1 z1,
 			X2 x2, Y2 y2, Z2 z2);
 
 		template<typename U, typename V>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			vec<3, U, Q> const& v1,
 			vec<3, V, Q> const& v2);
 
 		// -- Matrix conversions --
 
 		template<typename U, qualifier P>
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 3, U, P> const& m);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 3, U, P> const& m);
 
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 3, T, Q> const& x);
 
 		// -- Unary arithmetic operators --
 
diff --git a/glm/detail/type_mat2x3.inl b/glm/detail/type_mat2x3.inl
index 9944654c1..dc62d4de2 100644
--- a/glm/detail/type_mat2x3.inl
+++ b/glm/detail/type_mat2x3.inl
@@ -7,13 +7,13 @@ namespace glm
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat()
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat()
 		{}
 #	endif
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(mat<2, 3, T, Q> const& m)
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(mat<2, 3, T, Q> const& m)
 		{
 			this->value[0] = m.value[0];
 			this->value[1] = m.value[1];
@@ -22,21 +22,21 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<qualifier P>
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(mat<2, 3, T, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(mat<2, 3, T, P> const& m)
 	{
 		this->value[0] = m.value[0];
 		this->value[1] = m.value[1];
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(T scalar)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(T scalar)
 	{
 		this->value[0] = col_type(scalar, 0, 0);
 		this->value[1] = col_type(0, scalar, 0);
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat 
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat 
 	(
 		T x0, T y0, T z0,
 		T x1, T y1, T z1
@@ -47,7 +47,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(col_type const& v0, col_type const& v1)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(col_type const& v0, col_type const& v1)
 	{
 		this->value[0] = v0;
 		this->value[1] = v1;
@@ -59,7 +59,7 @@ namespace glm
 	template<
 		typename X1, typename Y1, typename Z1,
 		typename X2, typename Y2, typename Z2>
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat 
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat 
 	(
 		X1 x1, Y1 y1, Z1 z1,
 		X2 x2, Y2 y2, Z2 z2
@@ -71,7 +71,7 @@ namespace glm
 	
 	template<typename T, qualifier Q>
 	template<typename V1, typename V2>
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(vec<3, V1, Q> const& v1, vec<3, V2, Q> const& v2)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(vec<3, V1, Q> const& v1, vec<3, V2, Q> const& v2)
 	{
 		this->value[0] = col_type(v1);
 		this->value[1] = col_type(v2);
@@ -81,63 +81,63 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<typename U, qualifier P>
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(mat<2, 3, U, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(mat<2, 3, U, P> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(mat<2, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(mat<2, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER  mat<2, 3, T, Q>::mat(mat<3, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14  mat<2, 3, T, Q>::mat(mat<3, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(mat<4, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(mat<4, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(mat<2, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(mat<2, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(mat<3, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(mat<3, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(mat<3, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(mat<3, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(mat<4, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(mat<4, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
 	}
 
 	template<typename T, qualifier Q> 
-	GLM_FUNC_QUALIFIER mat<2, 3, T, Q>::mat(mat<4, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 3, T, Q>::mat(mat<4, 3, T, Q> const& m)
 	{
 		this->value[0] = m[0];
 		this->value[1] = m[1];
diff --git a/glm/detail/type_mat2x4.hpp b/glm/detail/type_mat2x4.hpp
index 00e8d9b8c..382f31ed5 100644
--- a/glm/detail/type_mat2x4.hpp
+++ b/glm/detail/type_mat2x4.hpp
@@ -35,16 +35,16 @@ namespace glm
 
 		// -- Constructors --
 
-		GLM_FUNC_DECL mat() GLM_DEFAULT;
-		GLM_FUNC_DECL mat(mat<2, 4, T, Q> const& m) GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat() GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 4, T, Q> const& m) GLM_DEFAULT;
 		template<qualifier P>
-		GLM_FUNC_DECL mat(mat<2, 4, T, P> const& m);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 4, T, P> const& m);
 
-		GLM_FUNC_DECL explicit mat(T scalar);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL explicit GLM_CONSTEXPR_CTOR_CXX14 mat(T scalar);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			T x0, T y0, T z0, T w0,
 			T x1, T y1, T z1, T w1);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			col_type const& v0,
 			col_type const& v1);
 
@@ -53,28 +53,28 @@ namespace glm
 		template<
 			typename X1, typename Y1, typename Z1, typename W1,
 			typename X2, typename Y2, typename Z2, typename W2>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			X1 x1, Y1 y1, Z1 z1, W1 w1,
 			X2 x2, Y2 y2, Z2 z2, W2 w2);
 
 		template<typename U, typename V>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			vec<4, U, Q> const& v1,
 			vec<4, V, Q> const& v2);
 
 		// -- Matrix conversions --
 
 		template<typename U, qualifier P>
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 4, U, P> const& m);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 4, U, P> const& m);
 
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 3, T, Q> const& x);
 
 		// -- Unary arithmetic operators --
 
diff --git a/glm/detail/type_mat2x4.inl b/glm/detail/type_mat2x4.inl
index 62fc5b1ab..b1254c83a 100644
--- a/glm/detail/type_mat2x4.inl
+++ b/glm/detail/type_mat2x4.inl
@@ -7,13 +7,13 @@ namespace glm
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat()
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat()
 		{}
 #	endif
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(mat<2, 4, T, Q> const& m)
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(mat<2, 4, T, Q> const& m)
 		{
 			this->value[0] = m.value[0];
 			this->value[1] = m.value[1];
@@ -22,14 +22,14 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<qualifier P>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(mat<2, 4, T, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(mat<2, 4, T, P> const& m)
 	{
 		this->value[0] = m.value[0];
 		this->value[1] = m.value[1];
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(T scalar)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(T scalar)
 	{
 		value_type const Zero(0);
 		this->value[0] = col_type(scalar, Zero, Zero, Zero);
@@ -37,7 +37,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat
 	(
 		T x0, T y0, T z0, T w0,
 		T x1, T y1, T z1, T w1
@@ -48,7 +48,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(col_type const& v0, col_type const& v1)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(col_type const& v0, col_type const& v1)
 	{
 		this->value[0] = v0;
 		this->value[1] = v1;
@@ -60,7 +60,7 @@ namespace glm
 	template<
 		typename X1, typename Y1, typename Z1, typename W1,
 		typename X2, typename Y2, typename Z2, typename W2>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat
 	(
 		X1 x1, Y1 y1, Z1 z1, W1 w1,
 		X2 x2, Y2 y2, Z2 z2, W2 w2
@@ -72,7 +72,7 @@ namespace glm
 	
 	template<typename T, qualifier Q>
 	template<typename V1, typename V2>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(vec<4, V1, Q> const& v1, vec<4, V2, Q> const& v2)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(vec<4, V1, Q> const& v1, vec<4, V2, Q> const& v2)
 	{
 		this->value[0] = col_type(v1);
 		this->value[1] = col_type(v2);
@@ -82,63 +82,63 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<typename U, qualifier P>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(mat<2, 4, U, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(mat<2, 4, U, P> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(mat<2, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(mat<2, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0, 0);
 		this->value[1] = col_type(m[1], 0, 0);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(mat<3, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(mat<3, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(mat<4, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(mat<4, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(mat<2, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(mat<2, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(mat<3, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(mat<3, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0, 0);
 		this->value[1] = col_type(m[1], 0, 0);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(mat<3, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(mat<3, 4, T, Q> const& m)
 	{
 		this->value[0] = m[0];
 		this->value[1] = m[1];
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(mat<4, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(mat<4, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0, 0);
 		this->value[1] = col_type(m[1], 0, 0);
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<2, 4, T, Q>::mat(mat<4, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<2, 4, T, Q>::mat(mat<4, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
diff --git a/glm/detail/type_mat3x2.hpp b/glm/detail/type_mat3x2.hpp
index 3fe00fdab..67d7304da 100644
--- a/glm/detail/type_mat3x2.hpp
+++ b/glm/detail/type_mat3x2.hpp
@@ -35,17 +35,17 @@ namespace glm
 
 		// -- Constructors --
 
-		GLM_FUNC_DECL mat() GLM_DEFAULT;
-		GLM_FUNC_DECL mat(mat<3, 2, T, Q> const& m) GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat() GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 2, T, Q> const& m) GLM_DEFAULT;
 		template<qualifier P>
-		GLM_FUNC_DECL mat(mat<3, 2, T, P> const& m);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 2, T, P> const& m);
 
-		GLM_FUNC_DECL explicit mat(T scalar);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL explicit GLM_CONSTEXPR_CTOR_CXX14 mat(T scalar);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			T x0, T y0,
 			T x1, T y1,
 			T x2, T y2);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			col_type const& v0,
 			col_type const& v1,
 			col_type const& v2);
@@ -56,13 +56,13 @@ namespace glm
 			typename X1, typename Y1,
 			typename X2, typename Y2,
 			typename X3, typename Y3>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			X1 x1, Y1 y1,
 			X2 x2, Y2 y2,
 			X3 x3, Y3 y3);
 
 		template<typename V1, typename V2, typename V3>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			vec<2, V1, Q> const& v1,
 			vec<2, V2, Q> const& v2,
 			vec<2, V3, Q> const& v3);
@@ -70,16 +70,16 @@ namespace glm
 		// -- Matrix conversions --
 
 		template<typename U, qualifier P>
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 2, U, P> const& m);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 2, U, P> const& m);
 
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 3, T, Q> const& x);
 
 		// -- Unary arithmetic operators --
 
diff --git a/glm/detail/type_mat3x2.inl b/glm/detail/type_mat3x2.inl
index 5a64edbb0..9091a74d6 100644
--- a/glm/detail/type_mat3x2.inl
+++ b/glm/detail/type_mat3x2.inl
@@ -6,14 +6,14 @@ namespace glm
 	// -- Constructors --
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
-		template<typename T, qualifier Q> 
-		GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat()
+		template<typename T, qualifier Q>
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat()
 		{}
 #	endif
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(mat<3, 2, T, Q> const& m)
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(mat<3, 2, T, Q> const& m)
 		{
 			this->value[0] = m.value[0];
 			this->value[1] = m.value[1];
@@ -23,7 +23,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<qualifier P>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(mat<3, 2, T, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(mat<3, 2, T, P> const& m)
 	{
 		this->value[0] = m.value[0];
 		this->value[1] = m.value[1];
@@ -31,7 +31,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(T scalar)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(T scalar)
 	{
 		this->value[0] = col_type(scalar, 0);
 		this->value[1] = col_type(0, scalar);
@@ -39,7 +39,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat
 	(
 		T x0, T y0,
 		T x1, T y1,
@@ -52,7 +52,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat
 	(
 		col_type const& v0,
 		col_type const& v1,
@@ -71,7 +71,7 @@ namespace glm
 		typename X1, typename Y1,
 		typename X2, typename Y2,
 		typename X3, typename Y3>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat
 	(
 		X1 x1, Y1 y1,
 		X2 x2, Y2 y2,
@@ -85,7 +85,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<typename V1, typename V2, typename V3>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat
 	(
 		vec<2, V1, Q> const& v1,
 		vec<2, V2, Q> const& v2,
@@ -101,7 +101,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<typename U, qualifier P>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(mat<3, 2, U, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(mat<3, 2, U, P> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -109,7 +109,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(mat<2, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(mat<2, 2, T, Q> const& m)
 	{
 		this->value[0] = m[0];
 		this->value[1] = m[1];
@@ -117,7 +117,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(mat<3, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(mat<3, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -125,7 +125,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(mat<4, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(mat<4, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -133,7 +133,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(mat<2, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(mat<2, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -141,7 +141,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(mat<2, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(mat<2, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -149,7 +149,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(mat<3, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(mat<3, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -157,7 +157,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(mat<4, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(mat<4, 2, T, Q> const& m)
 	{
 		this->value[0] = m[0];
 		this->value[1] = m[1];
@@ -165,7 +165,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 2, T, Q>::mat(mat<4, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 2, T, Q>::mat(mat<4, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -315,7 +315,7 @@ namespace glm
 		return m;
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 2, T, Q> operator-(mat<3, 2, T, Q> const& m)
 	{
 		return mat<3, 2, T, Q>(
@@ -353,7 +353,7 @@ namespace glm
 			m[2] - scalar);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 2, T, Q> operator-(mat<3, 2, T, Q> const& m1, mat<3, 2, T, Q> const& m2)
 	{
 		return mat<3, 2, T, Q>(
@@ -362,7 +362,7 @@ namespace glm
 			m1[2] - m2[2]);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 2, T, Q> operator*(mat<3, 2, T, Q> const& m, T scalar)
 	{
 		return mat<3, 2, T, Q>(
@@ -371,7 +371,7 @@ namespace glm
 			m[2] * scalar);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 2, T, Q> operator*(T scalar, mat<3, 2, T, Q> const& m)
 	{
 		return mat<3, 2, T, Q>(
@@ -379,7 +379,7 @@ namespace glm
 			m[1] * scalar,
 			m[2] * scalar);
 	}
-   
+
 	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER typename mat<3, 2, T, Q>::col_type operator*(mat<3, 2, T, Q> const& m, typename mat<3, 2, T, Q>::row_type const& v)
 	{
@@ -457,7 +457,7 @@ namespace glm
 			m[2] / scalar);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 2, T, Q> operator/(T scalar, mat<3, 2, T, Q> const& m)
 	{
 		return mat<3, 2, T, Q>(
@@ -474,7 +474,7 @@ namespace glm
 		return (m1[0] == m2[0]) && (m1[1] == m2[1]) && (m1[2] == m2[2]);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER bool operator!=(mat<3, 2, T, Q> const& m1, mat<3, 2, T, Q> const& m2)
 	{
 		return (m1[0] != m2[0]) || (m1[1] != m2[1]) || (m1[2] != m2[2]);
diff --git a/glm/detail/type_mat3x3.hpp b/glm/detail/type_mat3x3.hpp
index 9d4c5ded2..559556214 100644
--- a/glm/detail/type_mat3x3.hpp
+++ b/glm/detail/type_mat3x3.hpp
@@ -34,17 +34,17 @@ namespace glm
 
 		// -- Constructors --
 
-		GLM_FUNC_DECL mat() GLM_DEFAULT;
-		GLM_FUNC_DECL mat(mat<3, 3, T, Q> const& m) GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat() GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 3, T, Q> const& m) GLM_DEFAULT;
 		template<qualifier P>
-		GLM_FUNC_DECL mat(mat<3, 3, T, P> const& m);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 3, T, P> const& m);
 
-		GLM_FUNC_DECL explicit mat(T scalar);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL explicit GLM_CONSTEXPR_CTOR_CXX14 mat(T scalar);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			T x0, T y0, T z0,
 			T x1, T y1, T z1,
 			T x2, T y2, T z2);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			col_type const& v0,
 			col_type const& v1,
 			col_type const& v2);
@@ -55,13 +55,13 @@ namespace glm
 			typename X1, typename Y1, typename Z1,
 			typename X2, typename Y2, typename Z2,
 			typename X3, typename Y3, typename Z3>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			X1 x1, Y1 y1, Z1 z1,
 			X2 x2, Y2 y2, Z2 z2,
 			X3 x3, Y3 y3, Z3 z3);
 
 		template<typename V1, typename V2, typename V3>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			vec<3, V1, Q> const& v1,
 			vec<3, V2, Q> const& v2,
 			vec<3, V3, Q> const& v3);
@@ -69,16 +69,16 @@ namespace glm
 		// -- Matrix conversions --
 
 		template<typename U, qualifier P>
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 3, U, P> const& m);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 3, U, P> const& m);
 
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 3, T, Q> const& x);
 
 		// -- Unary arithmetic operators --
 
diff --git a/glm/detail/type_mat3x3.inl b/glm/detail/type_mat3x3.inl
index 8be4cf4ae..1f044e259 100644
--- a/glm/detail/type_mat3x3.inl
+++ b/glm/detail/type_mat3x3.inl
@@ -9,13 +9,13 @@ namespace glm
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat()
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat()
 		{}
 #	endif
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(mat<3, 3, T, Q> const& m)
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(mat<3, 3, T, Q> const& m)
 		{
 			this->value[0] = m.value[0];
 			this->value[1] = m.value[1];
@@ -25,7 +25,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<qualifier P>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(mat<3, 3, T, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(mat<3, 3, T, P> const& m)
 	{
 		this->value[0] = m.value[0];
 		this->value[1] = m.value[1];
@@ -33,7 +33,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(T scalar)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(T scalar)
 	{
 		this->value[0] = col_type(scalar, 0, 0);
 		this->value[1] = col_type(0, scalar, 0);
@@ -41,7 +41,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat
 	(
 		T x0, T y0, T z0,
 		T x1, T y1, T z1,
@@ -54,7 +54,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat
 	(
 		col_type const& v0,
 		col_type const& v1,
@@ -73,7 +73,7 @@ namespace glm
 		typename X1, typename Y1, typename Z1,
 		typename X2, typename Y2, typename Z2,
 		typename X3, typename Y3, typename Z3>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat
 	(
 		X1 x1, Y1 y1, Z1 z1,
 		X2 x2, Y2 y2, Z2 z2,
@@ -84,10 +84,10 @@ namespace glm
 		this->value[1] = col_type(static_cast<T>(x2), value_type(y2), value_type(z2));
 		this->value[2] = col_type(static_cast<T>(x3), value_type(y3), value_type(z3));
 	}
-	
+
 	template<typename T, qualifier Q>
 	template<typename V1, typename V2, typename V3>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat
 	(
 		vec<3, V1, Q> const& v1,
 		vec<3, V2, Q> const& v2,
@@ -103,7 +103,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<typename U, qualifier P>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(mat<3, 3, U, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(mat<3, 3, U, P> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -111,7 +111,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(mat<2, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(mat<2, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
@@ -119,7 +119,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(mat<4, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(mat<4, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -127,7 +127,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(mat<2, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(mat<2, 3, T, Q> const& m)
 	{
 		this->value[0] = m[0];
 		this->value[1] = m[1];
@@ -135,7 +135,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(mat<3, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(mat<3, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
@@ -143,7 +143,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(mat<2, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(mat<2, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -151,7 +151,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(mat<4, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(mat<4, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
@@ -159,7 +159,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(mat<3, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(mat<3, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -167,7 +167,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 3, T, Q>::mat(mat<4, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 3, T, Q>::mat(mat<4, 3, T, Q> const& m)
 	{
 		this->value[0] = m[0];
 		this->value[1] = m[1];
@@ -335,14 +335,14 @@ namespace glm
 	GLM_FUNC_QUALIFIER mat<3, 3, T, Q> operator-(mat<3, 3, T, Q> const& m)
 	{
 		return mat<3, 3, T, Q>(
-			-m[0], 
+			-m[0],
 			-m[1],
 			-m[2]);
 	}
 
 	// -- Binary arithmetic operators --
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 3, T, Q> operator+(mat<3, 3, T, Q> const& m, T scalar)
 	{
 		return mat<3, 3, T, Q>(
@@ -351,7 +351,7 @@ namespace glm
 			m[2] + scalar);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 3, T, Q> operator+(T scalar, mat<3, 3, T, Q> const& m)
 	{
 		return mat<3, 3, T, Q>(
@@ -360,7 +360,7 @@ namespace glm
 			m[2] + scalar);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 3, T, Q> operator+(mat<3, 3, T, Q> const& m1, mat<3, 3, T, Q> const& m2)
 	{
 		return mat<3, 3, T, Q>(
@@ -369,7 +369,7 @@ namespace glm
 			m1[2] + m2[2]);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 3, T, Q> operator-(mat<3, 3, T, Q> const& m, T scalar)
 	{
 		return mat<3, 3, T, Q>(
@@ -378,7 +378,7 @@ namespace glm
 			m[2] - scalar);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 3, T, Q> operator-(T scalar, mat<3, 3, T, Q> const& m)
 	{
 		return mat<3, 3, T, Q>(
@@ -387,7 +387,7 @@ namespace glm
 			scalar - m[2]);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 3, T, Q> operator-(mat<3, 3, T, Q> const& m1, mat<3, 3, T, Q> const& m2)
 	{
 		return mat<3, 3, T, Q>(
@@ -396,7 +396,7 @@ namespace glm
 			m1[2] - m2[2]);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 3, T, Q> operator*(mat<3, 3, T, Q> const& m, T scalar)
 	{
 		return mat<3, 3, T, Q>(
@@ -405,7 +405,7 @@ namespace glm
 			m[2] * scalar);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 3, T, Q> operator*(T scalar, mat<3, 3, T, Q> const& m)
 	{
 		return mat<3, 3, T, Q>(
@@ -414,7 +414,7 @@ namespace glm
 			m[2] * scalar);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER typename mat<3, 3, T, Q>::col_type operator*(mat<3, 3, T, Q> const& m, typename mat<3, 3, T, Q>::row_type const& v)
 	{
 		return typename mat<3, 3, T, Q>::col_type(
@@ -423,7 +423,7 @@ namespace glm
 			m[0][2] * v.x + m[1][2] * v.y + m[2][2] * v.z);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER typename mat<3, 3, T, Q>::row_type operator*(typename mat<3, 3, T, Q>::col_type const& v, mat<3, 3, T, Q> const& m)
 	{
 		return typename mat<3, 3, T, Q>::row_type(
@@ -432,7 +432,7 @@ namespace glm
 			m[2][0] * v.x + m[2][1] * v.y + m[2][2] * v.z);
 	}
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	GLM_FUNC_QUALIFIER mat<3, 3, T, Q> operator*(mat<3, 3, T, Q> const& m1, mat<3, 3, T, Q> const& m2)
 	{
 		T const SrcA00 = m1[0][0];
diff --git a/glm/detail/type_mat3x4.hpp b/glm/detail/type_mat3x4.hpp
index cfebd8679..9507d5bf3 100644
--- a/glm/detail/type_mat3x4.hpp
+++ b/glm/detail/type_mat3x4.hpp
@@ -35,17 +35,17 @@ namespace glm
 
 		// -- Constructors --
 
-		GLM_FUNC_DECL mat() GLM_DEFAULT;
-		GLM_FUNC_DECL mat(mat<3, 4, T, Q> const& m) GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat() GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 4, T, Q> const& m) GLM_DEFAULT;
 		template<qualifier P>
-		GLM_FUNC_DECL mat(mat<3, 4, T, P> const& m);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 4, T, P> const& m);
 
-		GLM_FUNC_DECL explicit mat(T scalar);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL explicit GLM_CONSTEXPR_CTOR_CXX14 mat(T scalar);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			T x0, T y0, T z0, T w0,
 			T x1, T y1, T z1, T w1,
 			T x2, T y2, T z2, T w2);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			col_type const& v0,
 			col_type const& v1,
 			col_type const& v2);
@@ -56,13 +56,13 @@ namespace glm
 			typename X1, typename Y1, typename Z1, typename W1,
 			typename X2, typename Y2, typename Z2, typename W2,
 			typename X3, typename Y3, typename Z3, typename W3>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			X1 x1, Y1 y1, Z1 z1, W1 w1,
 			X2 x2, Y2 y2, Z2 z2, W2 w2,
 			X3 x3, Y3 y3, Z3 z3, W3 w3);
 
 		template<typename V1, typename V2, typename V3>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			vec<4, V1, Q> const& v1,
 			vec<4, V2, Q> const& v2,
 			vec<4, V3, Q> const& v3);
@@ -70,16 +70,16 @@ namespace glm
 		// -- Matrix conversions --
 
 		template<typename U, qualifier P>
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 4, U, P> const& m);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 4, U, P> const& m);
 
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 3, T, Q> const& x);
 
 		// -- Unary arithmetic operators --
 
diff --git a/glm/detail/type_mat3x4.inl b/glm/detail/type_mat3x4.inl
index 28d3198fd..fc2515401 100644
--- a/glm/detail/type_mat3x4.inl
+++ b/glm/detail/type_mat3x4.inl
@@ -7,13 +7,13 @@ namespace glm
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat()
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat()
 		{}
 #	endif
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(mat<3, 4, T, Q> const& m)
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(mat<3, 4, T, Q> const& m)
 		{
 			this->value[0] = m.value[0];
 			this->value[1] = m.value[1];
@@ -23,7 +23,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<qualifier P>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(mat<3, 4, T, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(mat<3, 4, T, P> const& m)
 	{
 		this->value[0] = m.value[0];
 		this->value[1] = m.value[1];
@@ -31,7 +31,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(T scalar)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(T scalar)
 	{
 		this->value[0] = col_type(scalar, 0, 0, 0);
 		this->value[1] = col_type(0, scalar, 0, 0);
@@ -39,7 +39,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat 
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat
 	(
 		T x0, T y0, T z0, T w0,
 		T x1, T y1, T z1, T w1,
@@ -52,7 +52,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat 
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat
 	(
 		col_type const& v0,
 		col_type const& v1,
@@ -71,7 +71,7 @@ namespace glm
 		typename X1, typename Y1, typename Z1, typename W1,
 		typename X2, typename Y2, typename Z2, typename W2,
 		typename X3, typename Y3, typename Z3, typename W3>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat 
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat
 	(
 		X1 x1, Y1 y1, Z1 z1, W1 w1,
 		X2 x2, Y2 y2, Z2 z2, W2 w2,
@@ -82,10 +82,10 @@ namespace glm
 		this->value[1] = col_type(static_cast<T>(x2), value_type(y2), value_type(z2), value_type(w2));
 		this->value[2] = col_type(static_cast<T>(x3), value_type(y3), value_type(z3), value_type(w3));
 	}
-	
+
 	template<typename T, qualifier Q>
 	template<typename V1, typename V2, typename V3>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat 
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat
 	(
 		vec<4, V1, Q> const& v1,
 		vec<4, V2, Q> const& v2,
@@ -96,12 +96,12 @@ namespace glm
 		this->value[1] = col_type(v2);
 		this->value[2] = col_type(v3);
 	}
-	
+
 	// -- Matrix conversions --
 
 	template<typename T, qualifier Q>
 	template<typename U, qualifier P>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(mat<3, 4, U, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(mat<3, 4, U, P> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -109,7 +109,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(mat<2, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(mat<2, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0, 0);
 		this->value[1] = col_type(m[1], 0, 0);
@@ -117,7 +117,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(mat<3, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(mat<3, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
@@ -125,7 +125,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(mat<4, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(mat<4, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -133,7 +133,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(mat<2, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(mat<2, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
@@ -141,7 +141,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(mat<3, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(mat<3, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0, 0);
 		this->value[1] = col_type(m[1], 0, 0);
@@ -149,7 +149,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(mat<2, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(mat<2, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -157,7 +157,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(mat<4, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(mat<4, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0, 0);
 		this->value[1] = col_type(m[1], 0, 0);
@@ -165,7 +165,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>::mat(mat<4, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<3, 4, T, Q>::mat(mat<4, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
@@ -211,8 +211,8 @@ namespace glm
 		return *this;
 	}
 
-	template<typename T, qualifier Q> 
-	template<typename U> 
+	template<typename T, qualifier Q>
+	template<typename U>
 	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>& mat<3, 4, T, Q>::operator+=(U s)
 	{
 		this->value[0] += s;
@@ -221,8 +221,8 @@ namespace glm
 		return *this;
 	}
 
-	template<typename T, qualifier Q> 
-	template<typename U> 
+	template<typename T, qualifier Q>
+	template<typename U>
 	GLM_FUNC_QUALIFIER mat<3, 4, T, Q>& mat<3, 4, T, Q>::operator+=(mat<3, 4, U, Q> const& m)
 	{
 		this->value[0] += m[0];
diff --git a/glm/detail/type_mat4x2.hpp b/glm/detail/type_mat4x2.hpp
index 0c9b37258..74f4c98f6 100644
--- a/glm/detail/type_mat4x2.hpp
+++ b/glm/detail/type_mat4x2.hpp
@@ -35,18 +35,18 @@ namespace glm
 
 		// -- Constructors --
 
-		GLM_FUNC_DECL mat() GLM_DEFAULT;
-		GLM_FUNC_DECL mat(mat<4, 2, T, Q> const& m) GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat() GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 2, T, Q> const& m) GLM_DEFAULT;
 		template<qualifier P>
-		GLM_FUNC_DECL mat(mat<4, 2, T, P> const& m);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 2, T, P> const& m);
 
-		GLM_FUNC_DECL explicit mat(T scalar);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL explicit GLM_CONSTEXPR_CTOR_CXX14 mat(T scalar);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			T x0, T y0,
 			T x1, T y1,
 			T x2, T y2,
 			T x3, T y3);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			col_type const& v0,
 			col_type const& v1,
 			col_type const& v2,
@@ -59,14 +59,14 @@ namespace glm
 			typename X2, typename Y2,
 			typename X3, typename Y3,
 			typename X4, typename Y4>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			X1 x1, Y1 y1,
 			X2 x2, Y2 y2,
 			X3 x3, Y3 y3,
 			X4 x4, Y4 y4);
 
 		template<typename V1, typename V2, typename V3, typename V4>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			vec<2, V1, Q> const& v1,
 			vec<2, V2, Q> const& v2,
 			vec<2, V3, Q> const& v3,
@@ -75,16 +75,16 @@ namespace glm
 		// -- Matrix conversions --
 
 		template<typename U, qualifier P>
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 2, U, P> const& m);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 2, U, P> const& m);
 
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 4, T, Q> const& x);
 
 		// -- Unary arithmetic operators --
 
diff --git a/glm/detail/type_mat4x2.inl b/glm/detail/type_mat4x2.inl
index cc496232b..2485232b2 100644
--- a/glm/detail/type_mat4x2.inl
+++ b/glm/detail/type_mat4x2.inl
@@ -6,14 +6,14 @@ namespace glm
 	// -- Constructors --
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
-		template<typename T, qualifier Q> 
-		GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat()
+		template<typename T, qualifier Q>
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat()
 		{}
 #	endif
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(mat<4, 2, T, Q> const& m)
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(mat<4, 2, T, Q> const& m)
 		{
 			this->value[0] = m.value[0];
 			this->value[1] = m.value[1];
@@ -24,7 +24,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<qualifier P>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(mat<4, 2, T, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(mat<4, 2, T, P> const& m)
 	{
 		this->value[0] = m.value[0];
 		this->value[1] = m.value[1];
@@ -33,7 +33,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(T scalar)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(T scalar)
 	{
 		this->value[0] = col_type(scalar, 0);
 		this->value[1] = col_type(0, scalar);
@@ -42,7 +42,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat
 	(
 		T x0, T y0,
 		T x1, T y1,
@@ -57,7 +57,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat
 	(
 		col_type const& v0,
 		col_type const& v1,
@@ -79,7 +79,7 @@ namespace glm
 		typename X2, typename Y2,
 		typename X3, typename Y3,
 		typename X4, typename Y4>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat
 	(
 		X1 x1, Y1 y1,
 		X2 x2, Y2 y2,
@@ -92,10 +92,10 @@ namespace glm
 		this->value[2] = col_type(static_cast<T>(x3), value_type(y3));
 		this->value[3] = col_type(static_cast<T>(x4), value_type(y4));
 	}
-	
+
 	template<typename T, qualifier Q>
 	template<typename V1, typename V2, typename V3, typename V4>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat
 	(
 		vec<2, V1, Q> const& v1,
 		vec<2, V2, Q> const& v2,
@@ -113,7 +113,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<typename U, qualifier P>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(mat<4, 2, U, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(mat<4, 2, U, P> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -122,7 +122,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(mat<2, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(mat<2, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -131,7 +131,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(mat<3, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(mat<3, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -140,7 +140,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(mat<4, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(mat<4, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -149,7 +149,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(mat<2, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(mat<2, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -158,7 +158,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(mat<3, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(mat<3, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -167,7 +167,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(mat<2, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(mat<2, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -176,7 +176,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(mat<4, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(mat<4, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -185,7 +185,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 2, T, Q>::mat(mat<3, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 2, T, Q>::mat(mat<3, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
diff --git a/glm/detail/type_mat4x3.hpp b/glm/detail/type_mat4x3.hpp
index 09228b719..86a7e9c52 100644
--- a/glm/detail/type_mat4x3.hpp
+++ b/glm/detail/type_mat4x3.hpp
@@ -35,18 +35,18 @@ namespace glm
 
 		// -- Constructors --
 
-		GLM_FUNC_DECL mat() GLM_DEFAULT;
-		GLM_FUNC_DECL mat(mat<4, 3, T, Q> const& m) GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat() GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 3, T, Q> const& m) GLM_DEFAULT;
 		template<qualifier P>
-		GLM_FUNC_DECL mat(mat<4, 3, T, P> const& m);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 3, T, P> const& m);
 
-		GLM_FUNC_DECL explicit mat(T const& x);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL explicit GLM_CONSTEXPR_CTOR_CXX14 mat(T const& x);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			T const& x0, T const& y0, T const& z0,
 			T const& x1, T const& y1, T const& z1,
 			T const& x2, T const& y2, T const& z2,
 			T const& x3, T const& y3, T const& z3);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			col_type const& v0,
 			col_type const& v1,
 			col_type const& v2,
@@ -59,14 +59,14 @@ namespace glm
 			typename X2, typename Y2, typename Z2,
 			typename X3, typename Y3, typename Z3,
 			typename X4, typename Y4, typename Z4>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			X1 const& x1, Y1 const& y1, Z1 const& z1,
 			X2 const& x2, Y2 const& y2, Z2 const& z2,
 			X3 const& x3, Y3 const& y3, Z3 const& z3,
 			X4 const& x4, Y4 const& y4, Z4 const& z4);
 
 		template<typename V1, typename V2, typename V3, typename V4>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			vec<3, V1, Q> const& v1,
 			vec<3, V2, Q> const& v2,
 			vec<3, V3, Q> const& v3,
@@ -75,16 +75,16 @@ namespace glm
 		// -- Matrix conversions --
 
 		template<typename U, qualifier P>
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 3, U, P> const& m);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 3, U, P> const& m);
 
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 4, T, Q> const& x);
 
 		// -- Unary arithmetic operators --
 
diff --git a/glm/detail/type_mat4x3.inl b/glm/detail/type_mat4x3.inl
index 4fe9a45d8..cd1ae8671 100644
--- a/glm/detail/type_mat4x3.inl
+++ b/glm/detail/type_mat4x3.inl
@@ -7,13 +7,13 @@ namespace glm
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat()
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat()
 		{}
 #	endif
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(mat<4, 3, T, Q> const& m)
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(mat<4, 3, T, Q> const& m)
 		{
 			this->value[0] = m.value[0];
 			this->value[1] = m.value[1];
@@ -24,7 +24,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<qualifier P>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(mat<4, 3, T, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(mat<4, 3, T, P> const& m)
 	{
 		this->value[0] = m.value[0];
 		this->value[1] = m.value[1];
@@ -33,7 +33,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(T const& s)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(T const& s)
 	{
 		this->value[0] = col_type(s, 0, 0);
 		this->value[1] = col_type(0, s, 0);
@@ -42,7 +42,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat
 	(
 		T const& x0, T const& y0, T const& z0,
 		T const& x1, T const& y1, T const& z1,
@@ -57,7 +57,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat
 	(
 		col_type const& v0,
 		col_type const& v1,
@@ -79,7 +79,7 @@ namespace glm
 		typename X2, typename Y2, typename Z2,
 		typename X3, typename Y3, typename Z3,
 		typename X4, typename Y4, typename Z4>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat
 	(
 		X1 const& x1, Y1 const& y1, Z1 const& z1,
 		X2 const& x2, Y2 const& y2, Z2 const& z2,
@@ -92,10 +92,10 @@ namespace glm
 		this->value[2] = col_type(static_cast<T>(x3), value_type(y3), value_type(z3));
 		this->value[3] = col_type(static_cast<T>(x4), value_type(y4), value_type(z4));
 	}
-	
+
 	template<typename T, qualifier Q>
 	template<typename V1, typename V2, typename V3, typename V4>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat
 	(
 		vec<3, V1, Q> const& v1,
 		vec<3, V2, Q> const& v2,
@@ -113,7 +113,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<typename U, qualifier P>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(mat<4, 3, U, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(mat<4, 3, U, P> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -122,7 +122,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(mat<2, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(mat<2, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
@@ -131,7 +131,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(mat<3, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(mat<3, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -140,7 +140,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(mat<4, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(mat<4, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -149,7 +149,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(mat<2, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(mat<2, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -158,7 +158,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(mat<3, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(mat<3, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
@@ -167,7 +167,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(mat<2, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(mat<2, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -176,7 +176,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(mat<4, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(mat<4, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
@@ -185,7 +185,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 3, T, Q>::mat(mat<3, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 3, T, Q>::mat(mat<3, 4, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
diff --git a/glm/detail/type_mat4x4.hpp b/glm/detail/type_mat4x4.hpp
index 92051725c..f289aff86 100644
--- a/glm/detail/type_mat4x4.hpp
+++ b/glm/detail/type_mat4x4.hpp
@@ -34,18 +34,18 @@ namespace glm
 
 		// -- Constructors --
 
-		GLM_FUNC_DECL mat() GLM_DEFAULT;
-		GLM_FUNC_DECL mat(mat<4, 4, T, Q> const& m) GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat() GLM_DEFAULT;
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 4, T, Q> const& m) GLM_DEFAULT;
 		template<qualifier P>
-		GLM_FUNC_DECL mat(mat<4, 4, T, P> const& m);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 4, T, P> const& m);
 
-		GLM_FUNC_DECL explicit mat(T const& x);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL explicit GLM_CONSTEXPR_CTOR_CXX14 mat(T const& x);
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			T const& x0, T const& y0, T const& z0, T const& w0,
 			T const& x1, T const& y1, T const& z1, T const& w1,
 			T const& x2, T const& y2, T const& z2, T const& w2,
 			T const& x3, T const& y3, T const& z3, T const& w3);
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			col_type const& v0,
 			col_type const& v1,
 			col_type const& v2,
@@ -58,14 +58,14 @@ namespace glm
 			typename X2, typename Y2, typename Z2, typename W2,
 			typename X3, typename Y3, typename Z3, typename W3,
 			typename X4, typename Y4, typename Z4, typename W4>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			X1 const& x1, Y1 const& y1, Z1 const& z1, W1 const& w1,
 			X2 const& x2, Y2 const& y2, Z2 const& z2, W2 const& w2,
 			X3 const& x3, Y3 const& y3, Z3 const& z3, W3 const& w3,
 			X4 const& x4, Y4 const& y4, Z4 const& z4, W4 const& w4);
 
 		template<typename V1, typename V2, typename V3, typename V4>
-		GLM_FUNC_DECL mat(
+		GLM_FUNC_DECL GLM_CONSTEXPR_CTOR_CXX14 mat(
 			vec<4, V1, Q> const& v1,
 			vec<4, V2, Q> const& v2,
 			vec<4, V3, Q> const& v3,
@@ -74,16 +74,16 @@ namespace glm
 		// -- Matrix conversions --
 
 		template<typename U, qualifier P>
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 4, U, P> const& m);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 4, U, P> const& m);
 
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 3, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<2, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 2, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<3, 4, T, Q> const& x);
-		GLM_FUNC_DECL GLM_EXPLICIT mat(mat<4, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 3, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<2, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 2, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<3, 4, T, Q> const& x);
+		GLM_FUNC_DECL GLM_EXPLICIT GLM_CONSTEXPR_CTOR_CXX14 mat(mat<4, 3, T, Q> const& x);
 
 		// -- Unary arithmetic operators --
 
diff --git a/glm/detail/type_mat4x4.inl b/glm/detail/type_mat4x4.inl
index c8dbc17cf..098046413 100644
--- a/glm/detail/type_mat4x4.inl
+++ b/glm/detail/type_mat4x4.inl
@@ -9,13 +9,13 @@ namespace glm
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat()
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat()
 		{}
 #	endif
 
 #	if !GLM_HAS_DEFAULTED_FUNCTIONS
 		template<typename T, qualifier Q>
-		GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(mat<4, 4, T, Q> const& m)
+		GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(mat<4, 4, T, Q> const& m)
 		{
 			this->value[0] = m[0];
 			this->value[1] = m[1];
@@ -26,7 +26,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<qualifier P>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(mat<4, 4, T, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(mat<4, 4, T, P> const& m)
 	{
 		this->value[0] = m[0];
 		this->value[1] = m[1];
@@ -35,7 +35,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(T const& s)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(T const& s)
 	{
 		this->value[0] = col_type(s, 0, 0, 0);
 		this->value[1] = col_type(0, s, 0, 0);
@@ -44,7 +44,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat
 	(
 		T const& x0, T const& y0, T const& z0, T const& w0,
 		T const& x1, T const& y1, T const& z1, T const& w1,
@@ -59,7 +59,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat
 	(
 		col_type const& v0,
 		col_type const& v1,
@@ -75,7 +75,7 @@ namespace glm
 
 	template<typename T, qualifier Q>
 	template<typename U, qualifier P>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(mat<4, 4, U, P> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(mat<4, 4, U, P> const& m)
 	{
 		this->value[0] = col_type(m[0]);
 		this->value[1] = col_type(m[1]);
@@ -85,13 +85,13 @@ namespace glm
 
 	// -- Conversions --
 
-	template<typename T, qualifier Q> 
+	template<typename T, qualifier Q>
 	template<
 		typename X1, typename Y1, typename Z1, typename W1,
 		typename X2, typename Y2, typename Z2, typename W2,
 		typename X3, typename Y3, typename Z3, typename W3,
 		typename X4, typename Y4, typename Z4, typename W4>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat
 	(
 		X1 const& x1, Y1 const& y1, Z1 const& z1, W1 const& w1,
 		X2 const& x2, Y2 const& y2, Z2 const& z2, W2 const& w2,
@@ -124,16 +124,16 @@ namespace glm
 		this->value[2] = col_type(static_cast<T>(x3), value_type(y3), value_type(z3), value_type(w3));
 		this->value[3] = col_type(static_cast<T>(x4), value_type(y4), value_type(z4), value_type(w4));
 	}
-	
+
 	template<typename T, qualifier Q>
 	template<typename V1, typename V2, typename V3, typename V4>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat
 	(
 		vec<4, V1, Q> const& v1,
 		vec<4, V2, Q> const& v2,
 		vec<4, V3, Q> const& v3,
 		vec<4, V4, Q> const& v4
-	)		
+	)
 	{
 		GLM_STATIC_ASSERT(std::numeric_limits<V1>::is_iec559 || std::numeric_limits<V1>::is_integer || GLM_UNRESTRICTED_GENTYPE, "*mat4x4 constructor only takes float and integer types, 1st parameter type invalid.");
 		GLM_STATIC_ASSERT(std::numeric_limits<V2>::is_iec559 || std::numeric_limits<V2>::is_integer || GLM_UNRESTRICTED_GENTYPE, "*mat4x4 constructor only takes float and integer types, 2nd parameter type invalid.");
@@ -149,7 +149,7 @@ namespace glm
 	// -- Matrix conversions --
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(mat<2, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(mat<2, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0, 0);
 		this->value[1] = col_type(m[1], 0, 0);
@@ -158,7 +158,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(mat<3, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(mat<3, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
@@ -167,7 +167,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(mat<2, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(mat<2, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);
@@ -176,7 +176,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(mat<3, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(mat<3, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0, 0);
 		this->value[1] = col_type(m[1], 0, 0);
@@ -185,7 +185,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(mat<2, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(mat<2, 4, T, Q> const& m)
 	{
 		this->value[0] = m[0];
 		this->value[1] = m[1];
@@ -194,7 +194,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(mat<4, 2, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(mat<4, 2, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0, 0);
 		this->value[1] = col_type(m[1], 0, 0);
@@ -203,7 +203,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(mat<3, 4, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(mat<3, 4, T, Q> const& m)
 	{
 		this->value[0] = m[0];
 		this->value[1] = m[1];
@@ -212,7 +212,7 @@ namespace glm
 	}
 
 	template<typename T, qualifier Q>
-	GLM_FUNC_QUALIFIER mat<4, 4, T, Q>::mat(mat<4, 3, T, Q> const& m)
+	GLM_FUNC_QUALIFIER GLM_CONSTEXPR_CTOR_CXX14 mat<4, 4, T, Q>::mat(mat<4, 3, T, Q> const& m)
 	{
 		this->value[0] = col_type(m[0], 0);
 		this->value[1] = col_type(m[1], 0);