p.XTestEmbedPatterns, p.XTestEmbedPatternPos = cleanDecls(xTestEmbedPos)

	p.Imports, p.ImportPos = cleanDecls(importPos)
	p.TestImports, p.TestImportPos = cleanDecls(testImportPos)
	p.XTestImports, p.XTestImportPos = cleanDecls(xTestImportPos)

	for tag := range allTags {
		p.AllTags = append(p.AllTags, tag)
	}
	sort.Strings(p.AllTags)

	if len(p.CgoFiles) > 0 {
		p.SFiles = append(p.SFiles, Sfiles...)

	p.XTestEmbedPatterns, p.XTestEmbedPatternPos = cleanDecls(xTestEmbedPos)

	p.Imports, p.ImportPos = cleanDecls(importPos)
	p.TestImports, p.TestImportPos = cleanDecls(testImportPos)
	p.XTestImports, p.XTestImportPos = cleanDecls(xTestImportPos)

	// add the .S/.sx files only if we are using cgo
	// (which means gcc will compile them).
	// The standard assemblers expect .s files.
	if len(p.CgoFiles) > 0 {

	pxtestNeedsPtest := false
	var pxtestIncomplete bool
	rawXTestImports := str.StringList(p.XTestImports)
	for i, path := range p.XTestImports {
		p1, err := loadImport(ctx, opts, pre, path, p.Dir, p, &stk, p.Internal.Build.XTestImportPos[path], ResolveImport)
		if err != nil && pxtestErr == nil {
			pxtestErr = err
		}
		if p1.Incomplete {
			pxtestIncomplete = true
		}
		if p1.ImportPath == p.ImportPath {
			pxtestNeedsPtest = true

		{"Package.XTestDirectives", Field, 21},
		{"Package.XTestEmbedPatternPos", Field, 16},
		{"Package.XTestEmbedPatterns", Field, 16},
		{"Package.XTestGoFiles", Field, 0},
		{"Package.XTestImportPos", Field, 0},
		{"Package.XTestImports", Field, 0},
		{"ToolDir", Var, 0},
	},
	"go/build/constraint": {
		{"(*AndExpr).Eval", Method, 16},
		{"(*AndExpr).String", Method, 16},

pkg go/build, type Package struct, TestImportPos map[string][]token.Position
pkg go/build, type Package struct, TestImports []string
pkg go/build, type Package struct, XTestGoFiles []string
pkg go/build, type Package struct, XTestImportPos map[string][]token.Position
pkg go/build, type Package struct, XTestImports []string
pkg go/build, var Default Context
pkg go/build, var ToolDir string
pkg go/doc, const AllDecls Mode