tags := map[string]bool{}
			shouldBuild, binaryOnly, err := ctx.shouldBuild([]byte(tt.content), tags)
			if shouldBuild != tt.shouldBuild || binaryOnly != tt.binaryOnly || !reflect.DeepEqual(tags, tt.tags) || err != tt.err {
				t.Errorf("mismatch:\n"+
					"have shouldBuild=%v, binaryOnly=%v, tags=%v, err=%v\n"+
					"want shouldBuild=%v, binaryOnly=%v, tags=%v, err=%v",
					shouldBuild, binaryOnly, tags, err,

			}
			if gorootFirst {
				dir := ctxt.joinPath(ctxt.GOROOT, "src", path)
				if ctxt.Compiler != "gccgo" {
					isDir := ctxt.isDir(dir)
					binaryOnly = !isDir && mode&AllowBinary != 0 && pkga != "" && ctxt.isFile(ctxt.joinPath(ctxt.GOROOT, pkga))
					if isDir || binaryOnly {
						p.Dir = dir
						p.Goroot = true
						p.Root = ctxt.GOROOT
						goto Found
					}
				}
				tried.goroot = dir
			}

		synopsis - string offset
		name - string offset
		pkgName - string offset
		ignoreFile - int32 bool // report the file in Ignored(Go|Other)Files because there was an error reading it or parsing its build constraints.
		binaryOnly uint32 bool
		cgoDirectives string offset // the #cgo directive lines in the comment on import "C"
		goBuildConstraint  - string offset
		len(plusBuildConstraints) - uint32
		plusBuildConstraints - [n]uint32 (string offsets)

			continue
		}
		rf := &rawFile{
			name:                 name,
			goBuildConstraint:    info.goBuildConstraint,
			plusBuildConstraints: info.plusBuildConstraints,
			binaryOnly:           info.binaryOnly,
			directives:           info.directives,
		}
		if info.parsed != nil {
			rf.pkgName = info.parsed.Name.Name
		}

		// Going to save the file. For non-Go files, can stop here.

	}
}

func encodeFile(e *encoder, f *rawFile) {
	e.String(f.error)
	e.String(f.parseError)
	e.String(f.synopsis)
	e.String(f.name)
	e.String(f.pkgName)
	e.Bool(f.ignoreFile)
	e.Bool(f.binaryOnly)
	e.String(f.cgoDirectives)
	e.String(f.goBuildConstraint)

	e.Int(len(f.plusBuildConstraints))
	for _, s := range f.plusBuildConstraints {
		e.String(s)
	}

	e.Int(len(f.imports))

	// Look for +build comments to accept or reject the file.
	info.goBuildConstraint, info.plusBuildConstraints, info.binaryOnly, err = getConstraints(info.header)
	if err != nil {
		return nil, fmt.Errorf("%s: %v", name, err)
	}

	if ignoreBinaryOnly && info.binaryOnly {
		info.binaryOnly = false // override info.binaryOnly
	}

	return info, nil
}

// compiled but would be processed by tools like godoc and might be useful
// as end-user documentation.
//
// "go build" and other commands no longer support binary-only-packages.
// [Import] and [ImportDir] will still set the BinaryOnly flag in packages
// containing these comments for use in tools and error messages.

		isXTest := false
		if isTest && strings.HasSuffix(tf.pkgName(), "_test") && p.Name != tf.pkgName() {
			isXTest = true
			pkg = pkg[:len(pkg)-len("_test")]
		}

		if !isTest && tf.binaryOnly() {
			p.BinaryOnly = true
		}

		if p.Name == "" {
			p.Name = pkg
			firstFile = name
		} else if pkg != p.Name {
			// TODO(#45999): The choice of p.Name is arbitrary based on file iteration

pkg debug/elf, type R_390 int
pkg encoding/json, method (*Encoder) SetEscapeHTML(bool)
pkg encoding/json, method (*Encoder) SetIndent(string, string)
pkg go/build, type Package struct, BinaryOnly bool
pkg go/build, type Package struct, CgoFFLAGS []string
pkg go/build, type Package struct, FFiles []string
pkg go/doc, type Example struct, Unordered bool
pkg io, const SeekCurrent = 1

	tg.grepStderr("p1: binary-only packages are no longer supported", "did not report error for binary-only p1")

	tg.run("list", "-deps", "-f", "{{.ImportPath}}: {{.BinaryOnly}}", "p2")
	tg.grepStdout("p1: true", "p1 not listed as BinaryOnly")
	tg.grepStdout("p2: false", "p2 listed as BinaryOnly")
}

// Issue 16050 and 21884.
func TestLinkSysoFiles(t *testing.T) {
	if runtime.GOOS != "linux" || runtime.GOARCH != "amd64" {