make AddressSanitizer optional and disabled by default
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cb65bdc..e671dce 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -401,6 +401,7 @@
option_string(FOREGROUNDING_SIGNAL "number to use for magic foregrounding signal or 'OFF'" "OFF")
set_option(HIDAPI "Use HIDAPI for low level joystick drivers" ${OPT_DEF_HIDAPI})
set_option(JOYSTICK_VIRTUAL "Enable the virtual-joystick driver" ON)
+set_option(ASAN "Use AddressSanitizer to detect memory errors" OFF)
set(SDL_SHARED ${SDL_SHARED_ENABLED_BY_DEFAULT} CACHE BOOL "Build a shared version of the library")
set(SDL_STATIC ${SDL_STATIC_ENABLED_BY_DEFAULT} CACHE BOOL "Build a static version of the library")
@@ -2350,7 +2351,7 @@
endmacro()
# enable AddressSanitizer if supported
-if ( (CMAKE_C_COMPILER_ID STREQUAL "GNU") AND CMAKE_C_COMPILER_VERSION VERSION_GREATER 4)
+if (ASAN)
asan_check_add_debug_flag2("address")
asan_check_add_debug_flag("bool")
asan_check_add_debug_flag("bounds")
