On Thu, 14 Nov 2019 at 03:59, leo chen wrote: > > Dear developers, > > I have got a problem about g++ compatibility. > > I want to compile a c++ program by g++5.4, which need to link a library > compiled by g++4.8. I noticed the dual_abi > <https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html> since > g++5.1, so I set -D_GLIBCXX_USE_CXX11_ABI=0 in my CMakeLists.txt. The > compilation is ok but I got segmentation fault when I run the program. > To make it clear, the program works well when I downgrade my compiler to > g++4.8. > I wonder if there is any way we can link old library compiled by g++4.8 > without downgrade high version g++ compiler (g++5.1 above) ? > > Any suggestions and response would be appreciated!. You haven't said what your code does, or what features you're using, or what crashes. If you're using C++11 code compiled with GCC 4.8 and linking to C++11 code compiled with GCC 5, then in general no, you can't do that safely. See https://stackoverflow.com/a/49119902/981959 for details.
