Uses of Extrinsics

EXTRINSIC s may contain:

• a super-efficient message passing kernel,
• calls to library functions,
• an interface to a package,
• calls to `trusty' old code,
• calls to a different language,
• code which requires no synchronisation.

An extrinsic may be used to call any piece of code written in any language which performs any task as long as the compiler supports that interface.

Calls could be made to specialist sequential libraries such as the NAg FORTRAN 77 or Fortran 90 libraries.

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