16.4 Building Shared Libraries That Contain Exceptions

Never use -Bsymbolic with programs containing C++ code, use linker map files instead. With -Bsymbolic, references in different modules can bind to different copies of what is supposed to be one global object.

The exception mechanism relies on comparing addresses. If you have two copies of something, their addresses won’t compare equal, and the exception mechanism can fail because the exception mechanism relies on comparing what are supposed to be unique addresses.

When shared libraries are opened using dlopen(), you must use RTLD_GLOBAL for exceptions to work.