go/misc/cgo/fortran/answer.f90

! Copyright 2016 The Go Authors.  All rights reserved.
! Use of this source code is governed by a BSD-style
! license that can be found in the LICENSE file.

function the_answer() result(j) bind(C)
  use iso_c_binding, only: c_int
  integer(c_int) :: j ! output
  j = 42
end function the_answer
cmd/go, go/build: add support for Fortran This change adds support for Fortran files (.f, .F, .for, .f90) to the go tool, in a similar fashion to Objective-C/C++. Only gfortran is supported out of the box so far but leaves other Fortran compiler toolchains the ability to pass the correct link options via CGO_LDFLAGS. A simple test (misc/cgo/fortran) has been added and plugged into the general test infrastructure. This test is only enabled when the $FC environment variable is defined (or if 'gfortran' was found in $PATH.) Derived from CL 4114. Change-Id: Ifc855091942f95c6e9b17d91c17ceb4eee376408 Reviewed-on: https://go-review.googlesource.com/19670 Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> 2016-02-18 03:49:03 -07:00			`! Copyright 2016 The Go Authors. All rights reserved.`
			`! Use of this source code is governed by a BSD-style`
			`! license that can be found in the LICENSE file.`

			`function the_answer() result(j) bind(C)`
			`use iso_c_binding, only: c_int`
			`integer(c_int) :: j ! output`
			`j = 42`
			`end function the_answer`