cmd/dist: don't run fortran test if fortran compilation fails

Fixes #14498.

Change-Id: I4cfab3e45898466179cefbd31c6f7f796da82363
Reviewed-on: https://go-review.googlesource.com/19874
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

misc/cgo/fortran/helloworld/helloworld.f90

@@ -0,0 +1,3 @@
+      program HelloWorldF90
+              write(*,*) "Hello World!"
+      end program HelloWorldF90

misc/cgo/fortran/test.bash

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# 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.
+
+# This directory is intended to test the use of Fortran with cgo.
+
+set -e
+
+FC=$1
+
+if ! $FC helloworld/helloworld.f90 -o main.exe >& /dev/null; then
+  echo "skipping Fortran test: could not build helloworld.f90 with $FC"
+  exit 0
+fi
+
+if ! go test; then
+  echo "FAIL: go test"
+  status=1
+fi
+
+exit $status

src/cmd/dist/test.go

@@ -450,7 +450,7 @@ func (t *tester) registerTests() {
 				name:    "cgo_fortran",
 				heading: "../misc/cgo/fortran",
 				fn: func(dt *distTest) error {
-					t.addCmd(dt, "misc/cgo/fortran", "go", "test")
+					t.addCmd(dt, "misc/cgo/fortran", "./test.bash", fortran)
 					return nil
 				},
 			})