internal:link by LLGoFile to find libunwind

internal/crosscompile/cosscompile.go

@@ -6,11 +6,9 @@ import (
 	"os"
 	"path/filepath"
 	"runtime"
-	"strings"
 
 	"github.com/goplus/llgo/internal/env"
 	"github.com/goplus/llgo/internal/xtool/llvm"
-	envllvm "github.com/goplus/llgo/xtool/env/llvm"
 )
 
 type Export struct {
@@ -68,10 +66,6 @@ func Use(goos, goarch string, wasiThreads, changeRpath bool) (export Export, err
 				"-latomic",
 				"-lpthread", // libpthread is built-in since glibc 2.34 (2021-08-01); we need to support earlier versions.
 			)
-			llvmEnv := envllvm.New("")
-			if cflags := llvmEnv.Cflags(); cflags != "" {
-				export.CFLAGS = append(export.CFLAGS, strings.Fields(cflags)...)
-			}
 		}
 		return
 	}

runtime/internal/clite/debug/debug.go

@@ -9,7 +9,7 @@ import (
 )
 
 const (
-	LLGoFiles = "_wrap/debug.cpp"
+	LLGoFiles = "$(llvm-config --cflags): _wrap/debug.cpp"
 )
 
 type Info struct {

runtime/internal/clite/os/os_other.go

@@ -25,7 +25,7 @@ import (
 )
 
 const (
-	LLGoFiles   = "_os/os.c"
+	LLGoFiles   = "_os/os.cpp"
 	LLGoPackage = "link"
 )
 

xtool/env/llvm/llvm.go

@@ -50,7 +50,6 @@ func defaultLLVMConfigBin() string {
 // Env represents an LLVM installation.
 type Env struct {
 	binDir string
-	cflags string
 }
 
 // New creates a new [Env] instance.
@@ -63,12 +62,7 @@ func New(llvmConfigBin string) *Env {
 	// executables are assumed to be in PATH.
 	binDir, _ := exec.Command(llvmConfigBin, "--bindir").Output()
 
-	cflags, _ := exec.Command(llvmConfigBin, "--cflags").Output()
-
-	e := &Env{
-		binDir: strings.TrimSpace(string(binDir)),
-		cflags: strings.TrimSpace(string(cflags)),
-	}
+	e := &Env{binDir: strings.TrimSpace(string(binDir))}
 	return e
 }
 
@@ -76,8 +70,6 @@ func New(llvmConfigBin string) *Env {
 // means LLVM executables are assumed to be in PATH.
 func (e *Env) BinDir() string { return e.binDir }
 
-func (e *Env) Cflags() string { return e.cflags }
-
 // Clang returns a new [clang.Cmd] instance.
 func (e *Env) Clang() *clang.Cmd {
 	bin := filepath.Join(e.BinDir(), "clang++")