When using C++11 code that can possibly throw exceptions (such as
std::make_shared(...) linking libstdc++.a using Clang on MSYS2
will generate errors such as:
libstdc++.a(eh_personality.o): duplicate section
`.rdata$_ZTSSt9exception[_ZTSSt9exception]' has different size
Although potential suggested fixes involve allowing duplicate symbols,
-Wl,--allow-multiple-definition, this solution can introduce unexpected
behavior when one symbol clobbers another symbol.
To solve this, switching to dynamic linking of the libstdc++ library
appears to be all that's needed.
c776239c3c