Optional CMake opt-out of ASAN in debug mode build: -DCIVETWEB_ENABLE_ASAN=OFF

CMakeLists.txt

@@ -86,6 +86,10 @@ message(STATUS "Server statistics support - ${CIVETWEB_ENABLE_SERVER_STATS}")
 option(CIVETWEB_ENABLE_MEMORY_DEBUGGING "Enable the memory debugging features" OFF)
 message(STATUS "Memory Debugging - ${CIVETWEB_ENABLE_MEMORY_DEBUGGING}")
 
+# ASAN in debug mode (-fsanitize=address, etc)
+option(CIVETWEB_ENABLE_ASAN "Enable ASAN in debug mode" ON)
+message(STATUS "ASAN in debug mode - ${CIVETWEB_ENABLE_ASAN}")
+
 # LUA CGI support
 option(CIVETWEB_ENABLE_LUA "Enable Lua CGIs" OFF)
 message(STATUS "Lua CGI support - ${CIVETWEB_ENABLE_LUA}")
@@ -279,11 +283,13 @@ add_c_compiler_flag(-pedantic-errors)
 add_c_compiler_flag(-fvisibility=hidden)
 add_c_compiler_flag(-fstack-protector-strong RELEASE)
 add_c_compiler_flag(-flto RELEASE)
+if (${CIVETWEB_ENABLE_ASAN})
 add_c_compiler_flag(-fsanitize=undefined DEBUG)
 add_c_compiler_flag(-fsanitize=address DEBUG)
 if (HAVE_C_FLAG_FSANITIZE_ADDRESS)
   add_c_compiler_flag(-static-asan DEBUG)
 endif()
+endif()
 add_c_compiler_flag(-fstack-protector-all DEBUG)
 if (MINGW)
   add_c_compiler_flag(-mwindows)