4.1.7 -tune, -tune, (-tune=<architecture>)

The KAP preprocessor determines whether the host architecture is ev4 or ev5 and then optimizes your program for that architecture by default. In the event you compile a program on one architecture but plan to run it on another, override the default by setting -tune equal to the architecture where the program will run. For example, if you compile a program on ev4 architecture, but plan to run it on ev5 , use -tune=ev5 .

The KAP -tune switch and the DEC Fortran compiler -tune host switch work independently and perform different optimizations. The KAP -tune switch setting has no effect on the DEC Fortran default -tune host switch.

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