CODEWITHSUNDEEP
fortraninlinegfortran
BP8467
BP8467

Reputation: 2009

Inline keyword gfortran

Is there any Fortran keyword equivalent to the C "inline" keyword?

If some compiler-specific keyword exist, is there any for gfortran?

Upvotes: 8

Views: 4362

Answers (2)

Jonathan Dursi
Jonathan Dursi

Reputation: 50937

In general, the Fortran specifications grant the compiler writers enormous scope in how to implement things, so a language-level construct that forced (or even hinted) specific optimizations would be very un-Fortran-y.

What you typically do in modern Fortran is not specify optimizations, but tell the compiler things it can use to decide what optimizations to implement. So an example is labelling a side-effect-free function or subroutine PURE, so that certain optimizations are enabled (and actually, this may make for easier inlining).

Otherwise, as @Vladimir F points out, you can use compiler options which are presecriptive in this way.

In a similar vein, it seems that CONTAINed subprogram are more aggressively inlined by gfortran, but that may or may not help.

Upvotes: 8

Vladimir F Героям слава
Vladimir F Героям слава

Reputation: 60078

There is no source code statement I know of. Sometimes you can use statement functions, which are obviously inlined. Otherwise use compiler comand line options as gfortran's "-finline-functions".

Upvotes: 2

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