On 8/2/21 5:53 PM, Paul Koning wrote: > He did say "in the 1960s" so it may have been an early one without the high > quality optimizations that grew over time.
FTN was spawned during the 1960s. Bitsavers has the GIM from 1966: http://bitsavers.org/pdf/cdc/cyber/lang/fortran/60176400_FTN_Extd_Inf_Oct66.pdf RUN was sort of a cheap-and-quick compiler. CDC kept around both, as FTN compilation time was considerably longer (for obvious reasons). RUN started out to be the do-everything compiler. You could stack decks of FORTRAN and COMPASS in the same job and RUN would invoke the assembler as needed and invoke the loader load-and-go at the end. The JCL for that was simply "RUN." --Chuck
