40 lines
1.0 KiB
Go
40 lines
1.0 KiB
Go
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package loader
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import (
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"errors"
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"fmt"
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"go/build"
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"os/exec"
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"strings"
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)
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// pkgConfig runs pkg-config with the specified arguments and returns the flags it prints.
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func pkgConfig(mode string, pkgs []string) (flags []string, err error) {
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cmd := exec.Command("pkg-config", append([]string{mode}, pkgs...)...)
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out, err := cmd.CombinedOutput()
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if err != nil {
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s := fmt.Sprintf("%s failed: %v", strings.Join(cmd.Args, " "), err)
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if len(out) > 0 {
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s = fmt.Sprintf("%s: %s", s, out)
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}
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return nil, errors.New(s)
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}
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if len(out) > 0 {
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flags = strings.Fields(string(out))
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}
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return
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}
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// pkgConfigFlags calls pkg-config if needed and returns the cflags
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// needed to build the package.
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func pkgConfigFlags(p *build.Package) (cflags []string, err error) {
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if len(p.CgoPkgConfig) == 0 {
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return nil, nil
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}
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return pkgConfig("--cflags", p.CgoPkgConfig)
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}
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