| 1 | // Copyright 2013 The Go Authors. All rights reserved. |
|---|---|
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // Except for this comment, this file is a verbatim copy of the file |
| 6 | // with the same name in $GOROOT/src/go/internal/gccgoimporter. |
| 7 | |
| 8 | package gccgoimporter |
| 9 | |
| 10 | import ( |
| 11 | "bufio" |
| 12 | "go/types" |
| 13 | exec "golang.org/x/sys/execabs" |
| 14 | "os" |
| 15 | "path/filepath" |
| 16 | "strings" |
| 17 | ) |
| 18 | |
| 19 | // Information about a specific installation of gccgo. |
| 20 | type GccgoInstallation struct { |
| 21 | // Version of gcc (e.g. 4.8.0). |
| 22 | GccVersion string |
| 23 | |
| 24 | // Target triple (e.g. x86_64-unknown-linux-gnu). |
| 25 | TargetTriple string |
| 26 | |
| 27 | // Built-in library paths used by this installation. |
| 28 | LibPaths []string |
| 29 | } |
| 30 | |
| 31 | // Ask the driver at the given path for information for this GccgoInstallation. |
| 32 | // The given arguments are passed directly to the call of the driver. |
| 33 | func (inst *GccgoInstallation) InitFromDriver(gccgoPath string, args ...string) (err error) { |
| 34 | argv := append([]string{"-###", "-S", "-x", "go", "-"}, args...) |
| 35 | cmd := exec.Command(gccgoPath, argv...) |
| 36 | stderr, err := cmd.StderrPipe() |
| 37 | if err != nil { |
| 38 | return |
| 39 | } |
| 40 | |
| 41 | err = cmd.Start() |
| 42 | if err != nil { |
| 43 | return |
| 44 | } |
| 45 | |
| 46 | scanner := bufio.NewScanner(stderr) |
| 47 | for scanner.Scan() { |
| 48 | line := scanner.Text() |
| 49 | switch { |
| 50 | case strings.HasPrefix(line, "Target: "): |
| 51 | inst.TargetTriple = line[8:] |
| 52 | |
| 53 | case line[0] == ' ': |
| 54 | args := strings.Fields(line) |
| 55 | for _, arg := range args[1:] { |
| 56 | if strings.HasPrefix(arg, "-L") { |
| 57 | inst.LibPaths = append(inst.LibPaths, arg[2:]) |
| 58 | } |
| 59 | } |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | argv = append([]string{"-dumpversion"}, args...) |
| 64 | stdout, err := exec.Command(gccgoPath, argv...).Output() |
| 65 | if err != nil { |
| 66 | return |
| 67 | } |
| 68 | inst.GccVersion = strings.TrimSpace(string(stdout)) |
| 69 | |
| 70 | return |
| 71 | } |
| 72 | |
| 73 | // Return the list of export search paths for this GccgoInstallation. |
| 74 | func (inst *GccgoInstallation) SearchPaths() (paths []string) { |
| 75 | for _, lpath := range inst.LibPaths { |
| 76 | spath := filepath.Join(lpath, "go", inst.GccVersion) |
| 77 | fi, err := os.Stat(spath) |
| 78 | if err != nil || !fi.IsDir() { |
| 79 | continue |
| 80 | } |
| 81 | paths = append(paths, spath) |
| 82 | |
| 83 | spath = filepath.Join(spath, inst.TargetTriple) |
| 84 | fi, err = os.Stat(spath) |
| 85 | if err != nil || !fi.IsDir() { |
| 86 | continue |
| 87 | } |
| 88 | paths = append(paths, spath) |
| 89 | } |
| 90 | |
| 91 | paths = append(paths, inst.LibPaths...) |
| 92 | |
| 93 | return |
| 94 | } |
| 95 | |
| 96 | // Return an importer that searches incpaths followed by the gcc installation's |
| 97 | // built-in search paths and the current directory. |
| 98 | func (inst *GccgoInstallation) GetImporter(incpaths []string, initmap map[*types.Package]InitData) Importer { |
| 99 | return GetImporter(append(append(incpaths, inst.SearchPaths()...), "."), initmap) |
| 100 | } |
| 101 |
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