https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81361
--- Comment #21 from Iain Sandoe <iains at gcc dot gnu.org> --- Created attachment 42183 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42183&action=edit assembler for C++ testcase with .cfi_xxx this gives, when linked to the GCC8 static libstdc++ (I have a patch that actually makes -static-libstdc++ DTRT). $ ./tt terminate called after throwing an instance of 'int' terminate called recursively Abort trap: 6 With the system (GCC2.4) libstdc++.6.dylib we get: $ ./tt libc++abi.dylib: terminating with uncaught exception of type int Abort trap: 6 If built using the libc++ headers and library: CPLUS_INCLUDE_PATH=/path/to/usr/include/c++/v1 ./gcc/xg++ -Bgcc -O2 -save-temps -v /src-local/test-eh/pr81361.C -lc++ -o tt we get $ ./tt libc++abi.dylib: terminating with uncaught exception of type int Abort trap: 6