Re: [Boost-users] Performance and linking (boost_regex)

From: John Maddock (john_at_[hidden])
Date: 2008-07-10 13:52:37

Vladimir Prus wrote:
>> I think this fact that mere use of a single boost::regex function
>> cause
>> a bunch of implementation functions to be added to libtest.so to be
>> unfortunate -- besides possible performance issues you've found, it
>> also code bloat, and may
>> be dangerous if different versions of internal functions are
>> included in different libraries. Without further investigation, I
>> don't know how easy
>> it is to fix.

Surely this is true of *any* template though - if it's used by two different 
shared libraries then both instantiate and get a complete copy of the 
template.  If the two libraries are built with different build options, then 
you get ODR violations with all that means.  Unless I'm missing something I 
don't see anything to be fixed here, that's just how templates work?

John.