https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61121
Manuel López-Ibáñez <manu at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target| |x86_64-w64-mingw32 CC| |manu at gcc dot gnu.org --- Comment #9 from Manuel López-Ibáñez <manu at gcc dot gnu.org> --- "This option implies -pthread, and thus is only supported on targets that have support for -pthread." Does x86_64-w64-mingw32 support -pthread? You are better off asking in the mingw mailing lists. There are no Windows developers/users here.