diff --git a/glm/ext/matrix_clip_space.inl b/glm/ext/matrix_clip_space.inl
index baf68cca..1b4c7708 100644
--- a/glm/ext/matrix_clip_space.inl
+++ b/glm/ext/matrix_clip_space.inl
@@ -67,51 +67,56 @@ namespace glm
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoZO(T left, T right, T bottom, T top, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT
 			return orthoLH_ZO(left, right, bottom, top, zNear, zFar);
-		else
+#		else
 			return orthoRH_ZO(left, right, bottom, top, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoNO(T left, T right, T bottom, T top, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT
 			return orthoLH_NO(left, right, bottom, top, zNear, zFar);
-		else
+#		else
 			return orthoRH_NO(left, right, bottom, top, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoLH(T left, T right, T bottom, T top, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT
 			return orthoLH_ZO(left, right, bottom, top, zNear, zFar);
-		else
+#		else
 			return orthoLH_NO(left, right, bottom, top, zNear, zFar);
+#		endif
 
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> orthoRH(T left, T right, T bottom, T top, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT
 			return orthoRH_ZO(left, right, bottom, top, zNear, zFar);
-		else
+#		else
 			return orthoRH_NO(left, right, bottom, top, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> ortho(T left, T right, T bottom, T top, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO)
+#		if GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO
 			return orthoLH_ZO(left, right, bottom, top, zNear, zFar);
-		else if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO)
+#		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO
 			return orthoLH_NO(left, right, bottom, top, zNear, zFar);
-		else if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO)
+#		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO
 			return orthoRH_ZO(left, right, bottom, top, zNear, zFar);
-		else if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO)
+#		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO
 			return orthoRH_NO(left, right, bottom, top, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
@@ -173,50 +178,55 @@ namespace glm
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumZO(T left, T right, T bottom, T top, T nearVal, T farVal)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT
 			return frustumLH_ZO(left, right, bottom, top, nearVal, farVal);
-		else
+#		else
 			return frustumRH_ZO(left, right, bottom, top, nearVal, farVal);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumNO(T left, T right, T bottom, T top, T nearVal, T farVal)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT
 			return frustumLH_NO(left, right, bottom, top, nearVal, farVal);
-		else
+#		else
 			return frustumRH_NO(left, right, bottom, top, nearVal, farVal);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumLH(T left, T right, T bottom, T top, T nearVal, T farVal)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT
 			return frustumLH_ZO(left, right, bottom, top, nearVal, farVal);
-		else
+#		else
 			return frustumLH_NO(left, right, bottom, top, nearVal, farVal);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustumRH(T left, T right, T bottom, T top, T nearVal, T farVal)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT
 			return frustumRH_ZO(left, right, bottom, top, nearVal, farVal);
-		else
+#		else
 			return frustumRH_NO(left, right, bottom, top, nearVal, farVal);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> frustum(T left, T right, T bottom, T top, T nearVal, T farVal)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO)
+#		if GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO
 			return frustumLH_ZO(left, right, bottom, top, nearVal, farVal);
-		else if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO)
+#		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO
 			return frustumLH_NO(left, right, bottom, top, nearVal, farVal);
-		else if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO)
+#		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO
 			return frustumRH_ZO(left, right, bottom, top, nearVal, farVal);
-		else if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO)
+#		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO
 			return frustumRH_NO(left, right, bottom, top, nearVal, farVal);
+#		endif
 	}
 
 	template<typename T>
@@ -286,51 +296,56 @@ namespace glm
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveZO(T fovy, T aspect, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT
 			return perspectiveLH_ZO(fovy, aspect, zNear, zFar);
-		else
+#		else
 			return perspectiveRH_ZO(fovy, aspect, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveNO(T fovy, T aspect, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT
 			return perspectiveLH_NO(fovy, aspect, zNear, zFar);
-		else
+#		else
 			return perspectiveRH_NO(fovy, aspect, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveLH(T fovy, T aspect, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT
 			return perspectiveLH_ZO(fovy, aspect, zNear, zFar);
-		else
+#		else
 			return perspectiveLH_NO(fovy, aspect, zNear, zFar);
+#		endif
 
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveRH(T fovy, T aspect, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT
 			return perspectiveRH_ZO(fovy, aspect, zNear, zFar);
-		else
+#		else
 			return perspectiveRH_NO(fovy, aspect, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspective(T fovy, T aspect, T zNear, T zFar)
 	{
-		GLM_IF_CONSTEXPR(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO)
+#		if GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO
 			return perspectiveLH_ZO(fovy, aspect, zNear, zFar);
-		else GLM_IF_CONSTEXPR(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO)
+#		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO
 			return perspectiveLH_NO(fovy, aspect, zNear, zFar);
-		else GLM_IF_CONSTEXPR(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO)
+#		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO
 			return perspectiveRH_ZO(fovy, aspect, zNear, zFar);
-		else GLM_IF_CONSTEXPR(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO)
+#		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO
 			return perspectiveRH_NO(fovy, aspect, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
@@ -416,50 +431,55 @@ namespace glm
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovZO(T fov, T width, T height, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT
 			return perspectiveFovLH_ZO(fov, width, height, zNear, zFar);
-		else
+#		else
 			return perspectiveFovRH_ZO(fov, width, height, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovNO(T fov, T width, T height, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT
 			return perspectiveFovLH_NO(fov, width, height, zNear, zFar);
-		else
+#		else
 			return perspectiveFovRH_NO(fov, width, height, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovLH(T fov, T width, T height, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT
 			return perspectiveFovLH_ZO(fov, width, height, zNear, zFar);
-		else
+#		else
 			return perspectiveFovLH_NO(fov, width, height, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFovRH(T fov, T width, T height, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_ZO_BIT
 			return perspectiveFovRH_ZO(fov, width, height, zNear, zFar);
-		else
+#		else
 			return perspectiveFovRH_NO(fov, width, height, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> perspectiveFov(T fov, T width, T height, T zNear, T zFar)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO)
+#		if GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_ZO
 			return perspectiveFovLH_ZO(fov, width, height, zNear, zFar);
-		else if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO)
+		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_LH_NO
 			return perspectiveFovLH_NO(fov, width, height, zNear, zFar);
-		else if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO)
+		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_ZO
 			return perspectiveFovRH_ZO(fov, width, height, zNear, zFar);
-		else if(GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO)
+		elif GLM_CONFIG_CLIP_CONTROL == GLM_CLIP_CONTROL_RH_NO
 			return perspectiveFovRH_NO(fov, width, height, zNear, zFar);
+#		endif
 	}
 
 	template<typename T>
@@ -501,10 +521,11 @@ namespace glm
 	template<typename T>
 	GLM_FUNC_QUALIFIER mat<4, 4, T, defaultp> infinitePerspective(T fovy, T aspect, T zNear)
 	{
-		if(GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT)
+#		if GLM_CONFIG_CLIP_CONTROL & GLM_CLIP_CONTROL_LH_BIT
 			return infinitePerspectiveLH(fovy, aspect, zNear);
-		else
+#		else
 			return infinitePerspectiveRH(fovy, aspect, zNear);
+#		endif
 	}
 
 	// Infinite projection matrix: http://www.terathon.com/gdc07_lengyel.pdf
diff --git a/readme.md b/readme.md
index 547602ef..bae80988 100644
--- a/readme.md
+++ b/readme.md
@@ -64,6 +64,7 @@ glm::mat4 camera(float Translate, glm::vec2 const& Rotate)
 - Fixed equal ULP variation when using negative sign #965
 - Fixed for intersection ray/plane and added related tests #953
 - Fixed ARM 64bit detection #949
+- Fixed GLM_EXT_matrix_clip_space warnings #980
 
 ### [GLM 0.9.9.6](https://github.com/g-truc/glm/releases/tag/0.9.9.6) - 2019-09-08
 #### Features: