make VM computed goto dispatch table configurable

Author: Arcnor

CMakeLists.txt

@@ -9,6 +9,12 @@ set(ZIP_SRC thirdparty/zip/src)
 
 option(LIBSCRATCHCPP_BUILD_UNIT_TESTS "Build unit tests" ON)
 option(LIBSCRATCHCPP_NETWORK_SUPPORT "Support for downloading projects" ON)
+option(LIBSCRATCHCPP_COMPUTED_GOTO "Support for computed goto" ON)
+
+if (NOT (CMAKE_CXX_COMPILER_ID STREQUAL "GNU"))
+	# Computed goto not supported on anything except GCC
+	set(LIBSCRATCHCPP_COMPUTED_GOTO OFF CACHE BOOL "" FORCE)
+endif()
 
 find_package(nlohmann_json 3.9.1 REQUIRED)
 find_package(utf8cpp REQUIRED)
@@ -18,6 +24,10 @@ add_subdirectory(src)
 include_directories(src) # TODO: Remove this line
 include_directories(include)
 
+if (LIBSCRATCHCPP_COMPUTED_GOTO)
+	target_compile_definitions(scratchcpp PRIVATE ENABLE_COMPUTED_GOTO)
+endif()
+
 target_sources(scratchcpp
   PUBLIC
     include/scratchcpp/global.h