[Bug other/42540] c++ error message [vtable undefined] is unhelpful

["jwakely dot gcc at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #3 from jwakely dot gcc at gmail dot com  2010-01-06 10:42 -------
The linker error alone doesn't make the root cause obvious, but it's a fairly
well known and well documented problem:
http://www.parashift.com/c++-faq-lite/strange-inheritance.html#faq-23.10


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42540

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