From f2f93c7f5faf3d05b3e4e1bb21dd6ec4f3893c28 Mon Sep 17 00:00:00 2001
From: luoliwoshang <2643523683@qq.com>
Date: Wed, 11 Jun 2025 17:01:12 +0800
Subject: [PATCH] cl:compile with clang++

---
 internal/build/build.go                        |  2 ++
 .../clite/bitcast/_cast/{cast.c => cast.cpp}   | 18 ++++++++----------
 runtime/internal/clite/bitcast/bitcast.go      |  2 +-
 .../clite/debug/_wrap/{debug.c => debug.cpp}   | 15 +++++++--------
 runtime/internal/clite/debug/debug.go          |  2 +-
 xtool/clang/clang.go                           |  3 +++
 xtool/env/llvm/llvm.go                         |  2 +-
 7 files changed, 23 insertions(+), 21 deletions(-)
 rename runtime/internal/clite/bitcast/_cast/{cast.c => cast.cpp} (61%)
 rename runtime/internal/clite/debug/_wrap/{debug.c => debug.cpp} (78%)

diff --git a/internal/build/build.go b/internal/build/build.go
index 654b3746..1bc6078a 100644
--- a/internal/build/build.go
+++ b/internal/build/build.go
@@ -490,6 +490,8 @@ func linkMainPkg(ctx *context, pkg *packages.Package, pkgs []*aPackage, conf *Co
 	}
 	linkArgs = append(linkArgs, exargs...)
 
+	fmt.Fprintf(os.Stderr, "linkArgs: %v\n", linkArgs)
+
 	err = compileAndLinkLLFiles(ctx, app, llFiles, linkArgs, verbose)
 	check(err)
 
diff --git a/runtime/internal/clite/bitcast/_cast/cast.c b/runtime/internal/clite/bitcast/_cast/cast.cpp
similarity index 61%
rename from runtime/internal/clite/bitcast/_cast/cast.c
rename to runtime/internal/clite/bitcast/_cast/cast.cpp
index ea567ce5..ae4d6707 100644
--- a/runtime/internal/clite/bitcast/_cast/cast.c
+++ b/runtime/internal/clite/bitcast/_cast/cast.cpp
@@ -1,35 +1,33 @@
-typedef union
-{
+typedef union {
     double d;
     float f;
     long v;
     long long ll;
 } castUnion;
 
-double llgoToFloat64(long long v)
-{
+extern "C" {
+
+double llgoToFloat64(long long v) {
     castUnion k;
     k.ll = v;
     return k.d;
 }
 
-float llgoToFloat32(int v)
-{
+float llgoToFloat32(int v) {
     castUnion k;
     k.v = v;
     return k.f;
 }
 
-long long llgoFromFloat64(double v)
-{
+long long llgoFromFloat64(double v) {
     castUnion k;
     k.d = v;
     return k.ll;
 }
 
-int llgoFromFloat32(float v)
-{
+int llgoFromFloat32(float v) {
     castUnion k;
     k.f = v;
     return k.v;
 }
+}
\ No newline at end of file
diff --git a/runtime/internal/clite/bitcast/bitcast.go b/runtime/internal/clite/bitcast/bitcast.go
index 3fa7f6fa..07a79515 100644
--- a/runtime/internal/clite/bitcast/bitcast.go
+++ b/runtime/internal/clite/bitcast/bitcast.go
@@ -19,7 +19,7 @@ package bitcast
 import _ "unsafe"
 
 const (
-	LLGoFiles   = "_cast/cast.c"
+	LLGoFiles   = "_cast/cast.cpp"
 	LLGoPackage = "link"
 )
 
diff --git a/runtime/internal/clite/debug/_wrap/debug.c b/runtime/internal/clite/debug/_wrap/debug.cpp
similarity index 78%
rename from runtime/internal/clite/debug/_wrap/debug.c
rename to runtime/internal/clite/debug/_wrap/debug.cpp
index 32d87903..441cd971 100644
--- a/runtime/internal/clite/debug/_wrap/debug.c
+++ b/runtime/internal/clite/debug/_wrap/debug.cpp
@@ -9,13 +9,11 @@
 #include <dlfcn.h>
 #include <libunwind.h>
 
-void *llgo_address() {
-    return __builtin_return_address(0);
-}
+extern "C" {
 
-int llgo_addrinfo(void *addr, Dl_info *info) {
-    return dladdr(addr, info);
-}
+void *llgo_address() { return __builtin_return_address(0); }
+
+int llgo_addrinfo(void *addr, Dl_info *info) { return dladdr(addr, info); }
 
 void llgo_stacktrace(int skip, void *ctx, int (*fn)(void *ctx, void *pc, void *offset, void *sp, char *name)) {
     unw_cursor_t cursor;
@@ -33,9 +31,10 @@ void llgo_stacktrace(int skip, void *ctx, int (*fn)(void *ctx, void *pc, void *o
         if (unw_get_reg(&cursor, UNW_REG_IP, &pc) == 0) {
             unw_get_proc_name(&cursor, fname, sizeof(fname), &offset);
             unw_get_reg(&cursor, UNW_REG_SP, &sp);
-            if (fn(ctx, (void*)pc, (void*)offset, (void*)sp, fname) == 0) {
+            if (fn(ctx, (void *)pc, (void *)offset, (void *)sp, fname) == 0) {
                 return;
             }
         }
     }
-}
\ No newline at end of file
+}
+}
diff --git a/runtime/internal/clite/debug/debug.go b/runtime/internal/clite/debug/debug.go
index f762cb4d..2a02b718 100644
--- a/runtime/internal/clite/debug/debug.go
+++ b/runtime/internal/clite/debug/debug.go
@@ -9,7 +9,7 @@ import (
 )
 
 const (
-	LLGoFiles = "_wrap/debug.c"
+	LLGoFiles = "_wrap/debug.cpp"
 )
 
 type Info struct {
diff --git a/xtool/clang/clang.go b/xtool/clang/clang.go
index 9ac3974d..78ca3e18 100644
--- a/xtool/clang/clang.go
+++ b/xtool/clang/clang.go
@@ -91,6 +91,7 @@ func (p *Cmd) execWithFlags(flags []string, args ...string) error {
 	if p.Env != nil {
 		cmd.Env = p.Env
 	}
+	fmt.Fprintln(os.Stderr, cmd.String())
 	return cmd.Run()
 }
 
@@ -131,6 +132,8 @@ func (p *Cmd) CheckLinkArgs(cmdArgs []string, wasm bool) error {
 	srcIn := strings.NewReader(src)
 	p.Stdin = srcIn
 
+	fmt.Fprintf(os.Stderr, "args: %v\n", args)
+
 	// Execute the command
 	return p.execWithFlags([]string{"LDFLAGS", "CCFLAGS"}, args...)
 }
diff --git a/xtool/env/llvm/llvm.go b/xtool/env/llvm/llvm.go
index 82d0d13e..a34757c9 100644
--- a/xtool/env/llvm/llvm.go
+++ b/xtool/env/llvm/llvm.go
@@ -72,7 +72,7 @@ func (e *Env) BinDir() string { return e.binDir }
 
 // Clang returns a new [clang.Cmd] instance.
 func (e *Env) Clang() *clang.Cmd {
-	bin := filepath.Join(e.BinDir(), "clang")
+	bin := filepath.Join(e.BinDir(), "clang++")
 	return clang.New(bin)
 }