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Please ignore that patch. I found a much simpler way, which is a tiny patch and actually also works for the commented part of the test case of the previous patch (i.e. the missed-optimization bit).
Namely, I now simply only tag all the symbols which are written to the .mod file. That way, there should be never a symbol which outside used (no wrong-code issues).
OK from my point of view, though I can't tell whether it is exactly what we need or it's too big a hammer in some cases.
As a positive side effect, a lot of code could be removed from resolve.c and interface.c.
Build and regtested on x86-64-gnu-linux. OK for the trunk?
Thanks Mikael
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