Had the same linker error as T.J.Evers, except I'm using Intel Fortran and my error referred only to the LOG10 intrinsic. The linker did work (Windows 11) without error up until at least June 2025. The exact same linker operation failed in November 2025. I tried “/NODEFAULTLIB:libucrt.lib libucrt.lib” but that DID NOT work. However “/NODEFAULTLIB:libmmt.lib libmmt.lib” DID work (no linker error using the latter). The only software updates applied since June were mandatory Windows ones; no optional/manual updates done for anything else by me. As T.J.Evers says, "the solution turned out to be very counterintuitive"!