https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118244
--- Comment #7 from Brecht Sanders <brechtsanders at users dot sourceforge.net> --- This somehow did allow the build to proceed: make -Cbuild_mingw/$RUNPLATFORM/libstdc++-v3 LDFLAGS="-L$PWD/build_mingw/gcc -lcommon"
