add hasCppExtension check

config/ext.json

@@ -138,6 +138,7 @@
     },
     "intl": {
         "type": "builtin",
+        "cpp-extension": true,
         "lib-depends": [
             "icu"
         ]
@@ -327,6 +328,7 @@
         "type": "external",
         "source": "swoole",
         "arg-type": "custom",
+        "cpp-extension": true,
         "lib-depends": [
             "openssl"
         ],

src/SPC/builder/BuilderBase.php

@@ -140,6 +140,37 @@ abstract class BuilderBase
         return $this->exts[$name] ?? null;
     }
 
+    /**
+     * 获取所有要编译的扩展对象
+     *
+     * @return Extension[]
+     */
+    public function getExts(): array
+    {
+        return $this->exts;
+    }
+
+    /**
+     * 检查 C++ 扩展是否存在
+     *
+     * @throws FileSystemException
+     * @throws RuntimeException
+     * @throws WrongUsageException
+     */
+    public function hasCppExtension(): bool
+    {
+        // judge cpp-extension
+        $exts = array_keys($this->getExts());
+        $cpp = false;
+        foreach ($exts as $ext) {
+            if (Config::getExt($ext, 'cpp-extension', false) === true) {
+                $cpp = true;
+                break;
+            }
+        }
+        return $cpp;
+    }
+
     /**
      * 设置本次 Builder 是否为仅编译库的模式
      */

src/SPC/builder/linux/LinuxBuilder.php

@@ -139,7 +139,8 @@ class LinuxBuilder extends BuilderBase
                 )
             );
         }
-        if ($this->getExt('swoole') || $this->getExt('intl')) {
+
+        if ($this->hasCppExtension()) {
             $extra_libs .= ' -lstdc++';
         }
         if ($this->getExt('imagick')) {

src/SPC/builder/macos/MacOSBuilder.php

@@ -118,12 +118,15 @@ class MacOSBuilder extends BuilderBase
     }
 
     /**
-     * @throws RuntimeException
+     * @param  int                 $build_target build target
+     * @param  bool                $bloat        just raw add all lib files
      * @throws FileSystemException
+     * @throws RuntimeException
+     * @throws WrongUsageException
      */
     public function buildPHP(int $build_target = BUILD_TARGET_NONE, bool $bloat = false): void
     {
-        $extra_libs = $this->getFrameworks(true) . ' ' . ($this->getExt('swoole') || $this->getExt('intl') ? '-lc++ ' : '');
+        $extra_libs = $this->getFrameworks(true) . ' ' . ($this->hasCppExtension() ? '-lc++' : '');
         if (!$bloat) {
             $extra_libs .= implode(' ', $this->getAllStaticLibFiles());
         } else {