handle visibility target properties

CMake/cotire.cmake

@@ -464,6 +464,17 @@ function (cotire_get_target_compile_flags _config _language _target _flagsVar)
 			endif()
 		endif()
 	endif()
+	# handle visibility target properties
+	if (_target)
+		get_target_property(_targetVisibility ${_target} ${_language}_VISIBILITY_PRESET)
+		if (_targetVisibility AND CMAKE_${_language}_COMPILE_OPTIONS_VISIBILITY)
+			list (APPEND _compileFlags "${CMAKE_${_language}_COMPILE_OPTIONS_VISIBILITY}${_targetVisibility}")
+		endif()
+		get_target_property(_targetVisibilityInlines ${_target} VISIBILITY_INLINES_HIDDEN)
+		if (_targetVisibilityInlines AND CMAKE_${_language}_COMPILE_OPTIONS_VISIBILITY_INLINES_HIDDEN)
+			list (APPEND _compileFlags "${CMAKE_${_language}_COMPILE_OPTIONS_VISIBILITY_INLINES_HIDDEN}")
+		endif()
+	endif()
 	# platform specific flags
 	if (APPLE)
 		get_target_property(_architectures ${_target} OSX_ARCHITECTURES_${_upperConfig})