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Compiling stdc++ with strong symbol versioning
- From: Michael Dehmlow <dehmlowm at gmail dot com>
- To: gcc-help at gcc dot gnu dot org
- Date: Tue, 19 May 2009 08:31:00 -0700 (PDT)
- Subject: Compiling stdc++ with strong symbol versioning
Hello I'm relatively new to gcc development and I'm having trouble with
different versions of libstdc++.so being used at runtime. Basically I'm
creating an api which is used by a third party application (labview) which
uses libstdc++.so.5 my api needs to be compiled with libstdc++.so.6.
basically when every I run something like this:
std::string b = "bee";
std::string c = "see";
std::string a = b + c;
I get runtime crash because as far as I can tell the b+c string is allocated
with the 6 allocate symbol and deallocated with the 5 dealloc symbol.
This issue is detailed in the following gcc bug:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21405
The resolution appears to be detailed in
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24660
As far as I can tell (PLEASE tell me if I'm mistaken) I need to recompile
either my gcc compiler (version 4.1.2) or the stdlibc++.so.6 with the
--enable-symvers=gnu-versioned-namespaces flag then recompile my application
with the new compiler/ stdc++ library.
So my question is how do I do this? Do I need to recompile just my stdc++
library or my entire gcc compiler is this documented some where.
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