Error when trying to compiler with -Mchkfpstk

I got this error:

nvfortran-Error-Unknown switch: -Mchkfpstk

nvfortran --version
nvfortran 20.11-0 LLVM 64-bit target on x86-64 Linux -tp skylake

“-Mchkfpstk” was a very old PGI 32-bit only flag that has be deprecated since we stopped supporting 32-bit compilation. With the NVHPC SDK, we went through and removed the deprecated flags.

The problem is that it still documented in supported flags.
HPC Compiler Reference Manual Version 20.11 for ARM, OpenPower, x86 (

Oversite. I’ll send a note to the docs folks and have it removed.