Lahey/GNU Fortran

-[n]{ f2008 | f2003 | f95 }

Fortran Standard Conformance

Compile only. Default: -nf2008 -nf2003 -nf95

GFortran options: -std=f95, -std=f2003, -std=f2008

Specify -f95 to generate warnings when the compiler encounters non-standard Fortran 95 code. The compiler will not generate warnings for TR15581 extensions.