[Bug c++/42340] templated member func vanish from assembler code when -O2 is used

[redi at gcc dot gnu dot org]

------- Comment #2 from redi at gcc dot gnu dot org  2009-12-09 11:29 -------
If another translation unit is relying on finding an instantiation in bug.o
then you should use an explicit instantiation to ensure it is present, or the
other translation unit should include the definition of B::f


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42340