Trying to learn how to write small Forth interpreter (1), I find a very detailed tutorial (thanks web.archive.org again)(2). It's literal documented assembly you should be able to run through gcc to get native code. Except it doesn't. But someone uploaded it on github (3), so maybe this issue has been documented or fixed. No luck but there's an old blog post with comment mentionning problems close to mine. They're solution actually work (although I don't know gcc options enough to really understand why)(5).
1. http://lambda-the-ultimate.org/node/2452
2. http://web.archive.org/web/20090209003017/http://www.annexia.org/_file/jonesforth.s.txt
3. https://github.com/chengchangwu/jonesforth/
4. http://rwmj.wordpress.com/2010/08/07/jonesforth-git-repository/#comment-6591
5. you will need to recompile without the “-Wl,-Ttext,0″ option to GCC
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