Michael Dehmlow wrote: > > 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. > So I've tried to recompile gcc the following versions of gcc with the --enable-symvers=gnu-versioned-namespace flag I've also tested --enable-symvers=gnu-versioned-namespaces (with the s) there seems to be confusion on which it actually is... gcc-4.1.2 gcc-4.2.0 gcc-4.2.1 gcc-4.3.0 gcc-4.3.2 All failed with the following error: configure: error: Unknown argument to enable/disable symvers make[1]: *** [configure-target-libgomp] Error 1 With the exception of 4.12 which failed as follows: configure: error: Unknown argument to enable/disable symvers make[1]: *** [configure-target-libstdc++-v3] Error 1 I also was able to compile 3.3 which fixed my problem... accept that boost threads appear not to support gcc-3.3. So my only hope is the versioning of weak symbols. According to http://gcc.gnu.org/ml/gcc-bugs/2008-05/msg00058.html this is known to work in 4.2.4 and 4.1.2 BOTH of which I have tried and seen fail... which leads me do believe I am doing somthing wrong perhaps any thoughts: ../gcc-4.1.2/configure --enable-symvers=gnu-versioned-namespace --enable-Languages=c,c++ ../gcc-4.1.2/configure --enable-symvers=gnu-versioned-namespaces --enable-Languages=c,c++ ../gcc-4.1.2/configure --enable-symvers=gnu-versioned-namespace ../gcc-4.1.2/configure -enable-symvers=gnu-versioned-namespaces -- View this message in context: http://www.nabble.com/Compiling-stdc%2B%2B-with-strong-symbol-versioning-tp23618767p23660942.html Sent from the gcc - Help mailing list archive at Nabble.com.
