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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Take this as an example gcc/ios_init.cc at master =B7 gcc-mirror/gcc (github.com) what happens when if (__gnu_cxx::__exchange_and_add_dispatch(&_S_refcount, 1) !=3D 0?? Does that mean global objects of iostream are not initialized?) Probably this is why I get crashing on windows since never (__gnu_cxx::__ex= change_and_add_dispatch(&_S_refcount, 1) =3D=3D 0 With win32 thread model any more However, if I use lld or statically link with ld, the program would still w= ork. It does not when it dynamic link with ld. Sent from Mail for Windows --_000_DM6PR05MB46977BE72C0A74C18058A6C5D6609DM6PR05MB4697namp_--