test: move linkx and sinit to run.go

The remaining run-only tests will be migrated to run.go in another CL.

This CL will break the build due to issues 8746 and 8806.

Update #4139
Update #8746
Update #8806

LGTM=rsc
R=rsc, bradfitz, iant
CC=golang-codereviews
https://golang.org/cl/144630044

test/linkx.go

-// $G $D/$F.go && $L -X main.tbd hello -X main.overwrite trumped -X main.nosuchsymbol neverseen $F.$A && ./$A.out
-
-// NOTE: This test is not run by 'run.go' and so not run by all.bash.
-// To run this test you must use the ./run shell script.
+// skip
 
 // Copyright 2012 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.
 
 // Test the -X facility of the gc linker (6l etc.).
+// This test is run by linkx_run.go.
 
 package main
 
@@ -15,10 +13,6 @@ var tbd string
 var overwrite string = "dibs"
 
 func main() {
-	if tbd != "hello" {
-		println("BUG: test/linkx tbd", len(tbd), tbd)
-	}
-	if overwrite != "trumped" {
-		println("BUG: test/linkx overwrite", len(overwrite), overwrite)
-	}
+	println(tbd)
+	println(overwrite)
 }

test/linkx_run.go

+// run
+
+// Copyright 2014 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.
+
+// Run the linkx test.
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+)
+
+func main() {
+	cmd := exec.Command("go", "run", "-ldflags=-X main.tbd hello -X main.overwrite trumped", "linkx.go")
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		fmt.Println(string(out))
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	want := "hello\ntrumped\n"
+	got := string(out)
+	if got != want {
+		fmt.Printf("got %q want %q\n", got, want)
+		os.Exit(1)
+	}
+}

test/run.go

@@ -907,8 +907,6 @@ func (t *test) wantedErrors(file, short string) (errs []wantedError) {
 }
 
 var skipOkay = map[string]bool{
-	"linkx.go":            true, // like "run" but wants linker flags
-	"sinit.go":            true,
 	"fixedbugs/bug248.go": true, // combines errorcheckdir and rundir in the same dir.
 	"fixedbugs/bug302.go": true, // tests both .$O and .a imports.
 	"fixedbugs/bug345.go": true, // needs the appropriate flags in gc invocation.

test/sinit.go

-// $G -S $D/$F.go | egrep initdone >/dev/null && echo BUG sinit || true
-
-// NOTE: This test is not run by 'run.go' and so not run by all.bash.
-// To run this test you must use the ./run shell script.
+// skip
 
 // Copyright 2010 The Go Authors.  All rights reserved.
 // Use of this source code is governed by a BSD-style
@@ -9,6 +6,7 @@
 
 // Test that many initializations can be done at link time and
 // generate no executable init functions.
+// This test is run by sinit_run.go.
 
 package p
 
@@ -106,12 +104,12 @@ var answers = [...]int{
 }
 
 var (
-	copy_zero = zero
-	copy_one = one
-	copy_pi = pi
-	copy_slice = slice
+	copy_zero     = zero
+	copy_one      = one
+	copy_pi       = pi
+	copy_slice    = slice
 	copy_sliceInt = sliceInt
-	copy_hello = hello
+	copy_hello    = hello
 
 	// Could be handled without an initialization function, but
 	// requires special handling for "a = []byte("..."); b = a"
@@ -121,12 +119,12 @@ var (
 	// make this special case work.
 
 	copy_four, copy_five = four, five
-	copy_x, copy_y = x, y
-	copy_nilslice = nilslice
-	copy_nilmap = nilmap
-	copy_nilfunc = nilfunc
-	copy_nilchan = nilchan
-	copy_nilptr = nilptr
+	copy_x, copy_y       = x, y
+	copy_nilslice        = nilslice
+	copy_nilmap          = nilmap
+	copy_nilfunc         = nilfunc
+	copy_nilchan         = nilchan
+	copy_nilptr          = nilptr
 )
 
 var copy_a = a
@@ -179,7 +177,7 @@ var sx []int
 var s0 = []int{0, 0, 0}
 var s1 = []int{1, 2, 3}
 
-func fi() int
+func fi() int { return 1 }
 
 var ax [10]int
 var a0 = [10]int{0, 0, 0}
@@ -281,6 +279,8 @@ type T1 int
 
 func (t *T1) M() {}
 
-type Mer interface { M() }
+type Mer interface {
+	M()
+}
 
 var _ Mer = (*T1)(nil)

test/sinit_run.go

+// run
+
+// Copyright 2014 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.
+
+// Run the sinit test.
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"go/build"
+	"os"
+	"os/exec"
+)
+
+func main() {
+	letter, err := build.ArchChar(build.Default.GOARCH)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+
+	cmd := exec.Command("go", "tool", letter+"g", "-S", "sinit.go")
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		fmt.Println(string(out))
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	os.Remove("sinit." + letter)
+
+	if bytes.Contains(out, []byte("initdone")) {
+		fmt.Println("sinit generated an init function")
+		os.Exit(1)
+	}
+}