Update SSE AVX detection to test if the file exist and we MUST add some sse or...

Update SSE AVX detection to test if the file exist and we MUST add some sse or avx flag to compile the test files

CMakeLists.txt

@@ -222,7 +222,7 @@ if( ScalFMM_USE_SSE )
 		message(FATAL_ERROR "The CompileTestSseFile does not exist (${CMAKE_MODULE_PATH}/compileTestSse.cpp)" )
 	endif()
 	
-	TRY_COMPILE(COMPILE_SSE  ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_MODULE_PATH}/compileTestSse.cpp COMPILE_DEFINITIONS  "${CMAKE_CXX_FLAGS} -msse3")	
+	TRY_COMPILE(COMPILE_SSE  ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_MODULE_PATH}/compileTestSse.cpp COMPILE_DEFINITIONS  "${CMAKE_CXX_FLAGS} -msse4.2")	
 	
    	IF(${COMPILE_SSE})			     
 		TRY_COMPILE(COMPILE_RESULT_VAR  ${CMAKE_CURRENT_BINARY_DIR} 
@@ -240,7 +240,7 @@ if( ScalFMM_USE_SSE )
 			ENDIF()
 		    	MESSAGE(WARNING "INTEL  SSE CXX FLAGS: ${CMAKE_CXX_FLAGS} ")
   		ELSE()
-  		  	SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse -msse2 -msse3 -mfpmath=sse")
+  		  	SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.2 -mfpmath=sse")
   		ENDIF()
   	ELSE()
   		 MESSAGE(FATAL_ERROR "SSE NOT SUPPORTED ; Set ScalFMM_USE_SSE  to OFF")