cmd/dist: allow forcing dynamic linking

This remains unsupported, but is useful during testing, or when
packaging for some particularly stubborn distros.

Signed-off-by: Ophestra <cat@gensokyo.uk>

1 files changed, 33 insertions, 4 deletions

diff --git a/cmd/dist/main.go b/cmd/dist/main.go
index 1034f282..40a0583c 100644
--- a/cmd/dist/main.go
+++ b/cmd/dist/main.go
@@ -4,6 +4,7 @@ package main
 
 import (
 	"archive/tar"
+	"bytes"
 	"compress/gzip"
 	"context"
 	"crypto/sha512"
@@ -57,6 +58,7 @@ func main() {
 	verbose := os.Getenv("VERBOSE") != ""
 	runTests := os.Getenv("HAKUREI_DIST_MAKE") == ""
 	race := os.Getenv("HAKUREI_RACE") != ""
+	dynamic := os.Getenv("HAKUREI_DYNAMIC") != ""
 	version = getenv("HAKUREI_VERSION", strings.TrimSpace(version))
 	prefix := getenv("PREFIX", "/usr/local")
 	destdir := getenv("DESTDIR", "dist")
@@ -69,6 +71,12 @@ func main() {
 		version += "-race"
 	}
 
+	if err := os.Setenv("CC", "clang"); err != nil {
+		log.Fatal(err)
+	} else if err = os.Setenv("CXX", "clang++"); err != nil {
+		log.Fatal(err)
+	}
+
 	if err := os.MkdirAll(destdir, 0755); err != nil {
 		log.Fatal(err)
 	}
@@ -94,15 +102,36 @@ func main() {
 
 	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
 	defer cancel()
+	const stubFlag = "-buildvcs=false"
 
 	verboseFlag := "-v"
 	if !verbose {
-		verboseFlag = "-buildvcs=false"
+		verboseFlag = stubFlag
 	}
 
 	raceFlag := "-race"
 	if !race {
-		raceFlag = "-buildvcs=false"
+		raceFlag = stubFlag
+	}
+
+	ldflagsStatic := " -extldflags=-static"
+	if dynamic {
+		cmd := exec.CommandContext(ctx, "llvm-config", "--host-target")
+		cmd.Stderr = os.Stderr
+		var p []byte
+		p, err = cmd.Output()
+		if err != nil {
+			log.Fatal(err)
+		}
+		p = bytes.TrimSpace(p)
+		_, abi, ok := strings.CutLast(string(p), "-")
+		if !ok {
+			log.Fatalf("invalid target %q", string(p))
+		}
+		version += "-" + abi
+
+		log.Println("WARNING: dynamic linking is not supported")
+		ldflagsStatic = ""
 	}
 
 	log.Printf("Building hakurei %s for %s/%s.", version, runtime.GOOS, runtime.GOARCH)
@@ -112,7 +141,7 @@ func main() {
 		"-trimpath",
 		verboseFlag, raceFlag, "-o", s,
 		"-ldflags=-s -w "+
-			"-buildid= -linkmode external -extldflags=-static "+
+			"-buildid= -linkmode external"+ldflagsStatic+" "+
 			"-X hakurei.app/internal/info.buildVersion="+version+" "+
 			"-X hakurei.app/internal/info.hakureiPath="+prefix+"/bin/hakurei "+
 			"-X hakurei.app/internal/info.hsuPath="+prefix+"/bin/hsu",
@@ -136,7 +165,7 @@ func main() {
 		log.Println("##### Testing Hakurei.")
 		mustRun(
 			ctx, nil, "go", "test", raceFlag,
-			"-ldflags=-buildid= -linkmode external -extldflags=-static",
+			"-ldflags=-buildid= -linkmode external"+ldflagsStatic,
 			"./...",
 		)
 		log.Println()