jvl072170@xxxxxxxxxxxxxxxxx wrote: > I want to build a program in GNU g++ 4.2.0 linking it with a static > librrayd object built using gcc 3.4.4. Does the libxyz.a compiled using > gcc 3.4.4 link properly with a program being compiled using gcc 4.2.0 Usually yes, but not with C++. > I checked both the compilers use ABI version 2. > Version 4.2.o uses libstdc++.so.6.0.8 while 3.4.4. uses libstdc++.so.6.0.3. > What is the diffrence among these two versions of libstdc++?? These libraries are not binary compatible, sorry. You'll have to recompile. Andrew.