From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jody Goldberg <jodyg@idt.net>
To: egcs@cygnus.com
Subject: Re: problems with the recent snapshot (971207) (Solved)
Date: Mon, 08 Dec 1997 20:22:00 -0000
Message-id: <19971208222126.19112@tymbri>
References: <199712082343.RAA29705@server.cs.uiowa.edu> <m0xfE7Y-0004ecC@ocean.lucon.org>
X-SW-Source: 1997-12/msg00509.html

On Mon, Dec 08, 1997 at 05:05:56PM -0800, H.J. Lu wrote:
> > /tmp/cca294841.o:/home/phenning/EGCS/Build/build/libraries/libstdc++/testsuite/../../../../egcs-971207/libstdc++/testsuite/../std/bastring.h:148: undefined reference to `ostream & operator<<<char, string_char_traits<char>, __default_alloc_template<false, 0> >(ostream &, basic_string<char, string_char_traits<char>, __default_alloc_template<false, 0> > const &)'
> > [plus a lot of other similar errors]
> > 
> > so, tstring.cc compilation and tstring.cc -O compilation fail unexpectedly.
> > 
> > What else can I provide to help resolve this?
> 
> Same here on i586-linux-gnu. But it was ok on i586-linux-glibc1.
> Since egcs 971207 miscompiles things on x86, it is not that strange.
> 

The patch I submitted for bastring is the source of these problems.  If
you look at the error messages carefully you'll notice

undefined reference to `ostream & operator<<<char, string_char_traits<char>,
		    __default_alloc_template<false, 0>
		                             ^^^^^
>(ostream &, basic_string<char, string_char_traits<char>,
		    __default_alloc_template<false, 0> > const &)'
		                             ^^^^^
In the library you find
    basic_string<char, string_char_traits<char>,
		__default_alloc_template<true, 0> >
		                         ^^^^^

The issue is the -D_PTHREAD during the compilation of sinst.cc.
This causes the thread safe allocator to be used by default under Linux
glibc2.  However, _PTHREAD is NOT defined when tstring.cc is compiled and
it attempts to use the NON-thread safe allocator which was not instantiated
in libstdc++.

I mentioned this issue with the patch but did not have a solution.

What version(s) should go into the library ?  SGI uses _PTHREAD in the stl
and egcs defines it for linux in libstdc++/config/linux.mt.  How should it be
defined for general programs ?

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