Of course, you can save yourself a ton of trouble by implementing your language on top of the GCC toolchain — the purpose for which it was invented. Or you can

Of course, you can save yourself a ton of trouble by implementing your language on top of the GCC toolchain — the purpose for which it was invented. Or you can write a translator which converts yourLang into existinglang, then interpret/compile the latter. Or you can write an interpreter, which is generally less effort than a compiler. All these are less ambitious undertakings than the full set of subtasks you enumerate.