blob: a7bb1d507b070831ccd9ae85832e97074c9a5a22 [file] [log] [blame]
// Copyright 2017 The Wuffs Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"flag"
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
cf "github.com/google/wuffs/cmd/commonflags"
)
func doGenlib(args []string) error {
flags := flag.FlagSet{}
ccompilersFlag := flags.String("ccompilers", cf.CcompilersDefault, cf.CcompilersUsage)
dstdirFlag := flags.String("dstdir", "", "directory containing the object files ")
srcdirFlag := flags.String("srcdir", "", "directory containing the C source files")
if err := flags.Parse(args); err != nil {
return err
}
args = flags.Args()
filenames := make([]string, len(args))
for i, arg := range args {
filenames[i] = "wuffs-" + strings.Replace(filepath.ToSlash(arg), "/", "-", -1)
}
if *dstdirFlag == "" {
return fmt.Errorf("empty -dstdir flag")
}
if *srcdirFlag == "" {
return fmt.Errorf("empty -srcdir flag")
}
for _, cc := range strings.Split(*ccompilersFlag, ",") {
cc = strings.TrimSpace(cc)
if cc == "" {
continue
}
for _, dynamism := range []string{"static", "dynamic"} {
outDir := filepath.Join(*dstdirFlag, cc+"-"+dynamism)
if err := os.MkdirAll(outDir, 0755); err != nil {
return err
}
if err := genObj(outDir, *srcdirFlag, cc, dynamism, filenames); err != nil {
return err
}
if err := genLib(outDir, cc, dynamism, filenames); err != nil {
return err
}
}
}
return nil
}
// TODO: are these extensions correct for non-Linux?
var (
objExtensions = map[string]string{
"dynamic": ".lo",
"static": ".o",
}
libExtensions = map[string]string{
"dynamic": ".so",
"static": ".a",
}
)
func genObj(outDir string, inDir string, cc string, dynamism string, filenames []string) error {
for _, filename := range filenames {
in := filepath.Join(inDir, filename+".c")
out := genlibOutFilename(outDir, dynamism, filename)
args := []string(nil)
args = append(args, "-O3", "-std=c99", "-DWUFFS_IMPLEMENTATION")
if dynamism == "dynamic" {
args = append(args, "-fPIC", "-DPIC")
}
args = append(args, "-c", "-o", out, in)
cmd := exec.Command(cc, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
return err
}
fmt.Printf("genlib: %s\n", out)
}
return nil
}
func genLib(outDir string, cc string, dynamism string, filenames []string) error {
args := []string(nil)
switch dynamism {
case "dynamic":
// TODO: add a "-Wl,-soname,libwuffs.so.1.2.3" argument?
args = append(args, "-shared", "-fPIC", "-o")
case "static":
cc = "ar"
args = append(args, "rc")
}
out := filepath.Join(outDir, "libwuffs"+libExtensions[dynamism])
args = append(args, out)
for _, filename := range filenames {
args = append(args, genlibOutFilename(outDir, dynamism, filename))
}
cmd := exec.Command(cc, args...)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
return err
}
fmt.Printf("genlib: %s\n", out)
return nil
}
func genlibOutFilename(outDir string, dynamism string, filename string) string {
return filepath.Join(outDir, filename+objExtensions[dynamism])
}