Fixed SIMD instruction set selection with Clang

CMakeLists.txt

@@ -109,7 +109,7 @@ if(GLM_TEST_FORCE_PURE)
 	endif()
 	message(STATUS "GLM: No SIMD instruction set")
 elseif(GLM_TEST_ENABLE_SIMD_AVX2)
-	if(CMAKE_COMPILER_IS_GNUCXX)
+	if(CMAKE_COMPILER_IS_GNUCXX OR ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang"))
 		add_definitions(-mavx2)
 	elseif(GLM_USE_INTEL)
 		add_definitions(/QxAVX2)
@@ -118,7 +118,7 @@ elseif(GLM_TEST_ENABLE_SIMD_AVX2)
 	endif()
 	message(STATUS "GLM: AVX2 instruction set")
 elseif(GLM_TEST_ENABLE_SIMD_AVX)
-	if(CMAKE_COMPILER_IS_GNUCXX)
+	if(CMAKE_COMPILER_IS_GNUCXX OR ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang"))
 		add_definitions(-mavx)
 	elseif(GLM_USE_INTEL)
 		add_definitions(/QxAVX)
@@ -127,7 +127,7 @@ elseif(GLM_TEST_ENABLE_SIMD_AVX)
 	endif()
 	message(STATUS "GLM: AVX instruction set")
 elseif(GLM_TEST_ENABLE_SIMD_SSE3)
-	if(CMAKE_COMPILER_IS_GNUCXX)
+	if(CMAKE_COMPILER_IS_GNUCXX OR ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang"))
 		add_definitions(-msse3)
 	elseif(GLM_USE_INTEL)
 		add_definitions(/QxSSE3)
@@ -136,7 +136,7 @@ elseif(GLM_TEST_ENABLE_SIMD_SSE3)
 	endif()
 	message(STATUS "GLM: SSE3 instruction set")
 elseif(GLM_TEST_ENABLE_SIMD_SSE2)
-	if(CMAKE_COMPILER_IS_GNUCXX)
+	if(CMAKE_COMPILER_IS_GNUCXX OR ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang"))
 		add_definitions(-msse2)
 	elseif(GLM_USE_INTEL)
 		add_definitions(/QxSSE2)