Re: [boost] [regex] broken match_results functions for Intel 8.0

From: John Maddock (john_at_[hidden])
Date: 2005-08-20 07:36:31

> After upgrading to Boost 1.33.0 I found a problem with my code when
> built for Intel 8.0 on Linux.  The problem doesn't show up with g++.  I
> reduced it to a simple test case.  With Intel 8.0 it compiles but fails
> to link the executable, complaining that it can't find the 'position'
> and 'str' functions.  Note that it does find the 'length' function.

> Intel(R) C++ Compiler for 32-bit applications, Version 8.0   Build 
> 20040304Z Package ID: l_cc_pc_8.0.058_pe061
> Copyright (C) 1985-2004 Intel Corporation.  All rights reserved.

I can't reproduce that with Package 8.1.026 (unfortunately you can't install 
both 8.0 and 8.1 at the same time, so I wasn't able to test with 8.0).

I have a suspicion that what's happening is this:

The match_results<const char*> template instance is explicitly instantiated 
in the library, and declared as "extern" in user code (so it uses the 
instance in the library).  I suspect that your code is being built with 
inline expansions off, but the release version of the lib doesn't have these 
inline members instantiated in it, so either:

1) Try linking to the debug build of the lib when building with inline 
expansion turned off.
2) uncomment the line // #define BOOST_REGEX_NO_EXTERNAL_TEMPLATES in 
boost/regex/user.hpp and rebuild everything, the regex lib will now be 
slightly smaller, and your exe will be a lot bigger, but it should cure the 
problem.
3) Upgrade to Intel 8.1, I realise this might not be possible though.

HTH, John.