From mboxrd@z Thu Jan  1 00:00:00 1970
From: hjl@lucon.org (H.J. Lu)
To: jodyg@idt.net
Cc: egcs@cygnus.com
Subject: Re: problems with the recent snapshot (971207) (Solved)
Date: Tue, 09 Dec 1997 00:46:00 -0000
Message-id: <m0xfL4l-0004ecC@ocean.lucon.org>
References: <19971208222126.19112@tymbri>
X-SW-Source: 1997-12/msg00526.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 ?
> 

I don't like to link with -lpthread for my single thread program.
Can we have both in libstdc++, like compiling anything which
includes <alloc.h> twice?

# .... -D_PTHREAD -c -o stlinst.omt stlinst.cc
# .... -c -o stlinst.o stlinst.cc

Will it work?


-- 
H.J. Lu (hjl@gnu.org)