"I don't understand 'm' flag!" fatal error during compilation

[bmarcote]

During installation, pySCHED needs to compile part of the Fortran code belonging to the NRAO SCHED part.
In some occasions, the user may see that the compilation fails. If across the compilation error log you find several lines where the causing issue is the following one:

FATAL:/opt/local/bin/../libexec/as/x86_64/as: I don't understand 'm' flag!

It is an indication that the version of the compiler you are using is too old. You may need to upgrade gfortran, gcc, clang, llvm (or the compiler you are using), and/or libgcc, before trying to install pySCHED.