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Re: libstdc++/9580: basic_filebuf<> with custom traits_type failsto link

Gabriel Dos Reis wrote:


This is something we should fix.  However I don't have necessary time
next week to work on it. I'm sorry.
Well, so *I* will fix it ;)

Seriously, the PR is regression from 3.0.x, "due" to this checkin of yours and
Benjamin, apparently
(the problem is with std::basic_filebuf<char, MyTraits>::_M_underflow_common(bool):

2002-07-30 Benjamin Kosnik <bkoz@redhat.com>
Gabriel Dos Reis <gdr@nerim.net>

...

* include/std/std_fstream.h: Declare _M_underflow_common
specializations.
* src/fstream.cc: New. Add _M_underflow_common specializations.
* include/bits/fstream.tcc (filebuf::close): Use traits_type.
(filebuf::_M_underflow_common(bool)): Remove generic version, as
sys_ungetc and custom int_types don't get along.

...

Can you please help me a bit understanding these Changelog entries?

Thanks,
Paolo.

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