Re: [Boost-users] Re: strange filesystem dll behaviour (Beman Dawes)

From: Paul (elegant_dice_at_[hidden])
Date: 2005-01-22 07:17:03

Hi,

I assume you are talking about defining that when compiling my test program?

I tried it, it didn't work, it gave the same behaviour as before.

Any more ideas?  Has anyone tried my example?

Thanks
Paul

Christian Hoffmann wrote:
> Hi,
> 
> I guess, you don't define 
> 
> BOOST_ALL_DYN_LINK
> 
> Rgds
> --
> Christian Hoffmann                    
> Trema Laboratories SARL 
> 
> -----Original Message-----
> From: boost-users-request_at_[hidden]
> [mailto:boost-users-request_at_[hidden]] 
> Sent: Friday, January 21, 2005 6:12 PM
> To: boost-users_at_[hidden]
> Subject: Boost-users Digest, Vol 437, Issue 3
> 
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> Today's Topics:
> 
>    1. Re: strange filesystem dll behaviour (Beman Dawes)
>    2. Re: unordered_map/hash_table bug? (Daniel James)
>    3. Re: Re: (newbie) Linking problem using unit
> testframework(Mac
>       OSX 10.3.7 gcc 3.3 XCode 1.5). (Gennadiy Rozental)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Fri, 21 Jan 2005 10:18:02 -0500
> From: Beman Dawes <bdawes_at_[hidden]>
> Subject: Re: [Boost-users] strange filesystem dll behaviour
> To: boost-users_at_[hidden], boost-users_at_[hidden]
> Message-ID: <6.0.3.0.2.20050121100502.049f35e0_at_[hidden]>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
> 
> At 01:12 AM 1/20/2005, Paul wrote:
>  >I looked deeper into the problem, and hacked up boost a little to find
>  >out that the problem is the following check:
>  >
>  >       if ( (checker == no_check || checker == native) && src.size()
> 
>>= 2 
> 
> )
>  >at path_posix_windows.cpp:243
>  >
>  >specifically checker==native.
>  >
>  >I had constructed path with boost::filesystem::native, but when I
> hacked
>  >it up to do the following:
>  >
>  >#     ifdef BOOST_WINDOWS
>  >       std::stringstream ss; ss << "checker=" <<
>  >reinterpret_cast<unsigned long>(checker) << std::endl
>  >	      << "native=" << reinterpret_cast<unsigned long>(native) <<
>  >std::endl;
>  >       boost::throw_exception( filesystem_error(
>  >	"boost::filesystem::path",
>  >	ss.str() ));
>  >
>  >       if ( (checker == no_check || checker == native) && src.size()
> 
>>= 2 
> 
> )
>  >
>  >
>  >I got the following results from calling the line:
>  >boost::filesystem::path p(s,boost::filesystem::native);
>  >
>  >
>  >linking to libboost_filesystem-mgw-d-1_32.lib:
>  >checker=4201048   native=4201048
>  >
>  >linking to boost_filesystem-mgw-d-1_32.dll:
>  >checker=4263776   native=1649966248
>  >
>  >
>  >so, it appears that testing the checker using the address of a
> function
>  >is unreliable in a DLL context?  Have I compiled my program/library
>  >incorrectly?  I am not too familiar with DLL details etc, can someone
>  >else please shed some light on this?
> 
> I'm not a DLL expert either, but it certainly looks like there is some 
> problem with address of functions across DLL boundaries.
> 
> This code will be going away in the next version of the library, so I'm
> not 
> sure if it is worth putting a lot of effort into fixing it. But I'll try
> to 
> reproduce the problem here. If it does reproduce, it shouldn't be too
> hard 
> to come up with an interim fix.
> 
> Thanks for the report,
> 
> --Beman
> 
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Fri, 21 Jan 2005 16:15:48 +0000
> From: Daniel James <daniel_at_[hidden]>
> Subject: [Boost-users] Re: unordered_map/hash_table bug?
> To: boost-users_at_[hidden]
> Message-ID: <csr9ro$ma$1_at_[hidden]>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> Thorsten Ottosen wrote:
> 
>>"Martin Wartens" <martin.wartens_at_[hidden]> wrote in message 
>>news:380-22005121815022188_at_my-mail.ch...
>>Hi,
>>has anybody tried the implementation of unordered map that can be
> 
> found at
> 
> http://groups.yahoo.com/group/boost/files/jtc1-sc22-wg21-2003-n1456.tar.
> gz ?
> 
>>I believe there is a bug in the rehash function of the underlying
>>hash_table. The new bucket indices are computed using the old number
> 
> of
> 
>>buckets. That means that the items stored in these buckets cannot be
> 
> found
> 
>>anymore later.
>>-------
>>
>>Btw, would you mind to submit a patch to me to fix this bug?
>>
>>Thanks
>>
>>Thorsten 
> 
> 
> Hi Thorsten,
> 
> I'm working a new version which fixes this (and a few other) bugs. I'll 
> upload it the file vault soon.
> 
> Daniel
> 
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Fri, 21 Jan 2005 11:21:43 -0500
> From: "Gennadiy Rozental" <gennadiy.rozental_at_[hidden]>
> Subject: [Boost-users] Re: Re: (newbie) Linking problem using unit
> 	testframework(Mac OSX 10.3.7 gcc 3.3 XCode 1.5).
> To: boost-users_at_[hidden]
> Message-ID: <csra6n$1sg$1_at_[hidden]>
> 
>>c++filt _ZTv0_n12_NSoD0Ev
>>virtual thunk to std::basic_ostream<char, std::char_traits<char>
>>::~basic_ostream()
> 
> 
>>Then I tried to run just this:
>>#include <iostream>
>>
>>int main (int arc, char** argv)
>>{
>>std::cout << "test";
>>}
> 
> 
>>... and it failed with the same error.
>>However, if I remove from the project the unit test framework files,
> 
> it
> runs fine.
> 
> Hmm...
> 
> 
>>I am using libstdc++.a. I don't understand what is happening.
> 
> 
> So do I.
> 
> 
>>Why when I add the unit test framework code it doesn't find the
> 
> standard
> library ~basic_ostream() anymore ?
> 
> Most probably looks like compiler bug
> 
> 
>>It seems these last 5 years doing only Java got me really rusty with
> 
> C++
> (I'd rather work with C++ but the market forced me to go to Java).
> 
> I don't think 'last 5 years doing only Java' has anything to do with
> this.
> 
> Let's try couple more thigs:
> 
> 1. Could you locate where this undefined symbol referenced from?
> 2. Could you build framework as a standalone library and link with it?
> 
> Gennadiy
> 
> 
> 
> 
> 
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> 
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