https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110385
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2023-06-24 Status|UNCONFIRMED |WAITING Ever confirmed|0 |1 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- It should have matched this line: single) thread_header=gthr-single.h ;; I am suspecting you are intermixing cgywin and mingw env which is not a valid thing to do as they have different type of line endings and don't handle each other.