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From:	CBFalconer <cbfalconer AT yahoo DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: libstdc++ writev/2.04/patches upstream?
Date:	Sun, 13 Jul 2008 02:40:05 -0400
Organization:	Ched Research http://cbfalconer.home.att.net
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Andris Pavenis wrote:
> 
... snip ...
> 
> The first message of the thread is
> http://www.delorie.com/djgpp/mail-archives/browse.cgi?p=djgpp-workers/2007/12/05/17:54:46
> 
> I included there the source of my initial test program used for
> profiling. Remove shuffling addresses and freeing memory, link it
> with nmalloc and You will get what I use for testing when large
> enough number of allocations were specified (like more that
> 1000000, You should have plenty of memory for that). This test
> program randomly crashed when linked with nmalloc and never for
> me if with DJGPP v2.04 own malloc (for this test slowness of
> free() does not matter of course).
> 
> I do not know whether it is possible to reproduce the problem on
> system different from WinXP.

I attempted to compile that test, and got:

[1] c:\c\malloc>cc malltst.cpp
In file included from malltst.cpp:1644:
c:/djgpp/lang/cxx/3.21/bits/stl_algo.h: In function `_Distance
   std::__random_number(_Distance) [with _Distance = int]':
c:/djgpp/lang/cxx/3.21/bits/stlalgobase.h:94:   instantiated from
`void std::ite
r_swap(_ForwardIter1, _ForwardIter2) [with _ForwardIter1 = unsigned
char**, _For
wardIter2 = unsigned char**]'
malltst.cpp:1644:   instantiated from `void
std::random_shuffle(_RandomAccessIte
r, _RandomAccessIter) [with _RandomAccessIter = unsigned char**]'
malltst.cpp:24:   instantiated from here
c:/djgpp/lang/cxx/3.21/bits/stl_algo.h:1617: `lrand48' undeclared
(first use
   this function)
c:/djgpp/lang/cxx/3.21/bits/stl_algo.h:1617: (Each undeclared
identifier is
   reported only once for each function it appears in.)

I have absolutely no experience with C++.  cc is an alias for gcc,
which sets up -W -Wall -ansi -pedantic -Wwrite-strings
-Wfloat-equal -gstabs+.

I have forced large numbers of assignments without problems.  See
the C source for testing hashlib on my page.

-- 
 [mail]: Chuck F (cbfalconer at maineline dot net) 
 [page]: <http://cbfalconer.home.att.net>
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