Can SPAG handle extensions to the ANSI standard?
Yes. Each version of SPAG is tailored to accept the extensions to the ANSI standard which are supported by the host system compiler. For example, the VAX version supports all of VMS Fortran, and the MVS version all of VS Fortran. The PC version accepts almost all the extensions supported by the Salford, Lahey, Microsoft and Watcom compilers.