[Bug sanitizer/64670] -fsanitize=vptr leads to "undefined reference to `typeinfo for class'"

["burnus at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64670

--- Comment #6 from Tobias Burnus <burnus at gcc dot gnu.org> ---
Created attachment 34628
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34628&action=edit
Updated test case (part 2/2): [aux file]

Updated test case. The first file matches what the original source code had:

  #pragma interface
in the header and
  #pragma implementation "file.h"

in the implementation. However, "class LogListener" is only forward declared in
the header file - and in the actual implementation also includes
"LogListener.h", which also has "#pragma interface".


The LogListener.cc file includes LogListener.h and has "#pragma
implementation".

For my "aux file", no symbol is generated at all. For the real-world
LogListener.cc, a "V typeinfo for LogListener" is created and "W
LogListener::LogListener()". (In the original file, a class inheriting from
LogListener is declared (.h) and implemented (.cc).)