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These encodings are simple enough that I wouldn't expect them to change over time. I would think it more likely that there would be a bug, either in gcc's encoding of them or in gdb's processing of them. And if the code is duplicated, then both locations need to be modified to fix the bug -- with the attendant risk that someone will modify one and forget to modify the other. Or will modify it, but accidentally make it slightly different.
I don't know how people would feel about having STABS have a description of the encoding combined with a caveat that the DWARF 2.0.0 spec is authoritative. I would certainly prefer that the STABS document remain self contained.
I think this is a good strategy. It's already a ``gcc extension'', and stealing an existing (known to be working) spec is always a good strategy :-)
Have you thought about link time information compression? One of the complaints leveled at the macro stuff is the size of the resultant debug info.
Andrew
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