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// Copyright 2015 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.
package main_test
import (
"go/build"
"runtime"
"testing"
"cmd/internal/buildid"
)
func TestNoteReading(t *testing.T) {
// cmd/internal/buildid already has tests that the basic reading works.
// This test is essentially checking that -ldflags=-buildid=XXX works,
// both in internal and external linking mode.
tg := testgo(t)
defer tg.cleanup()
tg.parallel()
tg.tempFile("hello.go", `package main; func main() { print("hello, world\n") }`)
const buildID = "TestNoteReading-Build-ID"
tg.run("build", "-ldflags", "-buildid="+buildID, "-o", tg.path("hello.exe"), tg.path("hello.go"))
id, err := buildid.ReadFile(tg.path("hello.exe"))
if err != nil {
t.Fatalf("reading build ID from hello binary: %v", err)
}
if id != buildID {
t.Fatalf("buildID in hello binary = %q, want %q", id, buildID)
}
switch {
case !build.Default.CgoEnabled:
t.Skipf("skipping - no cgo, so assuming external linking not available")
case runtime.GOOS == "plan9":
t.Skipf("skipping - external linking not supported")
}
tg.run("build", "-ldflags", "-buildid="+buildID+" -linkmode=external", "-o", tg.path("hello2.exe"), tg.path("hello.go"))
id, err = buildid.ReadFile(tg.path("hello2.exe"))
if err != nil {
t.Fatalf("reading build ID from hello binary (linkmode=external): %v", err)
}
if id != buildID {
t.Fatalf("buildID in hello binary = %q, want %q (linkmode=external)", id, buildID)
}
switch runtime.GOOS {
case "dragonfly", "freebsd", "linux", "netbsd", "openbsd":
// Test while forcing use of the gold linker, since in the past
// we've had trouble reading the notes generated by gold.
err := tg.doRun([]string{"build", "-ldflags", "-buildid=" + buildID + " -linkmode=external -extldflags=-fuse-ld=gold", "-o", tg.path("hello3.exe"), tg.path("hello.go")})
if err != nil {
if tg.grepCountBoth("(invalid linker|gold|cannot find [‘']ld[’'])") > 0 {
// It's not an error if gold isn't there. gcc claims it "cannot find 'ld'" if
// ld.gold is missing, see issue #22340.
t.Log("skipping gold test")
break
}
t.Fatalf("building hello binary: %v", err)
}
id, err = buildid.ReadFile(tg.path("hello3.exe"))
if err != nil {
t.Fatalf("reading build ID from hello binary (linkmode=external -extldflags=-fuse-ld=gold): %v", err)
}
if id != buildID {
t.Fatalf("buildID in hello binary = %q, want %q (linkmode=external -extldflags=-fuse-ld=gold)", id, buildID)
}
}
}
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