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Added ICC checks for native optimizations

Signed-off-by: Gabriel Ravier <[email protected]>

--- a/CMakeLists.txt

+++ b/CMakeLists.txt

@@ -455,11 +455,19 @@

 # Enable -march=native if available

 if(NATIVE_OPTIMIZATIONS)

 	include(CheckCXXCompilerFlag)

-	CHECK_CXX_COMPILER_FLAG("-march=native" COMPILER_SUPPORTS_MARCH_NATIVE)

+	CHECK_CXX_COMPILER_FLAG("-march=native" COMPILER_SUPPORTS_MARCH_NATIVE)	# GCC flag

 	if(COMPILER_SUPPORTS_MARCH_NATIVE)

 		target_compile_options(CSE2 PRIVATE -march=native)

 	else()

-		message(WARNING "Couldn't activate native optimizations ! (Unsupported compiler)")

+		CHECK_CXX_COMPILER_FLAG("-xHost" COMPILER_SUPPORTS_XHOST)	# ICC (Linux) flag

+		CHECK_CXX_COMPILER_FLAG("/QxHost" COMPILER_SUPPORTS_QXHOST)	# ICC (Windows) flag

+		if(COMPILER_SUPPORTS_XHOST)

+			target_compile_options(CSE2 PRIVATE -xHost)

+		elseif(COMPILER_SUPPORTS_QXHOST)

+			target_compile_options(CSE2 PRIVATE /QxHost)

+		else()

+			message(WARNING "Couldn't activate native optimizations ! (Unsupported compiler)")

+		endif()

 	endif()

 endif()