release/dist, tool/gocross: add fake "windowsdll" GOOS to gocross

We're going to need to build a DLL containing custom actions for the installer.
This patch adds the foundations of that capability to dist and gocross.

Updates https://github.com/tailscale/corp/issues/13998

Signed-off-by: Aaron Klotz <aaron@tailscale.com>
pull/9507/head
Aaron Klotz 1 year ago
parent 5473d11caa
commit ea6ca78963

@ -269,7 +269,12 @@ func (b *Build) BuildGoBinaryWithTags(path string, env map[string]string, tags [
}
sort.Strings(envStrs)
buildDir := b.TmpDir()
args := []string{"build", "-v", "-o", buildDir}
outPath := buildDir
if env["GOOS"] == "windowsdll" {
// DLL builds fail unless we use a fully-qualified path to the output binary.
outPath = filepath.Join(buildDir, filepath.Base(path)+".dll")
}
args := []string{"build", "-v", "-o", outPath}
if len(tags) > 0 {
tagsStr := strings.Join(tags, ",")
log.Printf("Building %s (with env %s, tags %s)", path, strings.Join(envStrs, " "), tagsStr)
@ -288,6 +293,8 @@ func (b *Build) BuildGoBinaryWithTags(path string, env map[string]string, tags [
out := filepath.Join(buildDir, filepath.Base(path))
if env["GOOS"] == "windows" || env["GOOS"] == "windowsgui" {
out += ".exe"
} else if env["GOOS"] == "windowsdll" {
out += ".dll"
}
return out, nil
})

@ -31,6 +31,7 @@ func autoflagsForTest(argv []string, env *Environment, goroot, nativeGOOS, nativ
var (
subcommand = ""
cc = "cc"
targetOS = env.Get("GOOS", nativeGOOS)
targetArch = env.Get("GOARCH", nativeGOARCH)
buildFlags = []string{"-trimpath"}
@ -89,6 +90,22 @@ func autoflagsForTest(argv []string, env *Environment, goroot, nativeGOOS, nativ
// quoted in its entirety as a member of -ldflags. Source:
// https://github.com/golang/go/issues/6234
ldflags = append(ldflags, fmt.Sprintf("'-extldflags=%s'", strings.Join(extldflags, " ")))
case "windowsdll":
// Fake GOOS that translates to "windows, but building .dlls not .exes"
targetOS = "windows"
cgo = true
buildFlags = append(buildFlags, "-buildmode=c-shared")
ldflags = append(ldflags, "-H", "windows", "-s")
var mingwArch string
switch targetArch {
case "amd64":
mingwArch = "x86_64"
case "386":
mingwArch = "i686"
default:
return nil, nil, fmt.Errorf("unsupported GOARCH=%q when building with cgo", targetArch)
}
cc = fmt.Sprintf("%s-w64-mingw32-gcc", mingwArch)
case "windowsgui":
// Fake GOOS that translates to "windows, but building GUI .exes not console .exes"
targetOS = "windows"
@ -166,7 +183,7 @@ func autoflagsForTest(argv []string, env *Environment, goroot, nativeGOOS, nativ
env.Set("CGO_ENABLED", boolStr(cgo))
env.Set("CGO_CFLAGS", strings.Join(cgoCflags, " "))
env.Set("CGO_LDFLAGS", strings.Join(cgoLdflags, " "))
env.Set("CC", "cc")
env.Set("CC", cc)
env.Set("TS_LINK_FAIL_REFLECT", boolStr(failReflect))
env.Set("GOROOT", goroot)

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