feat(backend): 实现响应文件机制解决命令行长度限制

- 添加 createResponseFile 方法将目标文件列表写入 .rsp 文件
- 在 MSVC、GCC/Clang 编译器后端中使用 @rsp 参数替代长命令行
- 修复单元测试以验证响应文件参数生成
- 支持路径含空格时的双引号包裹处理
- 兼容 Windows 8191 字符命令行长度限制

phpunit/src/Backend/BackendTest.php

@@ -57,16 +57,17 @@ class BackendTest extends TestCase
     {
         $platform = new Windows();
         $compiler = new Msvc($platform);
-        
+
         $cmd = $compiler->linkObjects(
             ['test.obj'],
             'output.exe',
             ['C:\PHP\lib'],
             ['php8.lib']
         );
-        
+
         $this->assertStringContainsString('link', $cmd);
-        $this->assertStringContainsString('test.obj', $cmd);
+        $this->assertStringContainsString('@', $cmd);
+        $this->assertStringContainsString('.rsp', $cmd);
         $this->assertStringContainsString('/OUT:', $cmd);
         $this->assertStringContainsString('output.exe', $cmd);
         $this->assertStringContainsString('/LIBPATH:', $cmd);

src/Php/Backend/CompilerBackend.php

@@ -152,4 +152,26 @@ abstract class CompilerBackend
     {
         return $this->platform->getLibraryFlags($libraries);
     }
+
+    /**
+     * 将目标文件列表写入 Response File，避免命令行参数过长超出 OS 限制（Windows 8191 字符）
+     *
+     * @param array  $objectFiles 目标文件路径列表
+     * @param string $targetFile  最终输出文件路径（Response File 写入同目录）
+     * @return string 链接器参数，如 @build/project.rsp
+     */
+    protected function createResponseFile(array $objectFiles, string $targetFile): string
+    {
+        $rspFile = dirname($targetFile) . DIRECTORY_SEPARATOR . basename($targetFile) . '.rsp';
+        $lines = [];
+        foreach ($objectFiles as $file) {
+            // 路径含空格时用双引号包裹，MSVC link.exe 和 GCC/Clang 均支持
+            if (str_contains($file, ' ')) {
+                $file = '"' . $file . '"';
+            }
+            $lines[] = $file;
+        }
+        file_put_contents($rspFile, implode("\n", $lines));
+        return '@' . $rspFile;
+    }
 }

src/Php/Backend/GccLikeBackend.php

@@ -125,7 +125,7 @@ abstract class GccLikeBackend extends CompilerBackend
         array $flags = []
     ): string {
         $cmd = $this->getLinkerCommand();
-        $cmd .= ' ' . implode(' ', array_map('escapeshellarg', $objectFiles));
+        $cmd .= ' ' . $this->createResponseFile($objectFiles, $outputFile);
         $cmd .= ' ' . $this->getLinkerOutputFlag() . ' ' . escapeshellarg($outputFile);
 
         if (!empty($libraryPaths)) {
@@ -208,7 +208,7 @@ abstract class GccLikeBackend extends CompilerBackend
     public function buildLinkCommand(array $objectFiles, string $outputFile, array $options = []): string
     {
         $cmd = $this->getLinkerCommand();
-        $cmd .= ' ' . implode(' ', array_map('escapeshellarg', $objectFiles));
+        $cmd .= ' ' . $this->createResponseFile($objectFiles, $outputFile);
         $cmd .= ' ' . $this->getLinkerOutputFlag() . ' ' . escapeshellarg($outputFile);
 
         if (!empty($options['library_paths'])) {

src/Php/Backend/Msvc.php

@@ -72,9 +72,9 @@ class Msvc extends CompilerBackend
     ): string {
         $cmd = $this->getLinkerCommand();
         
-        // 添加目标文件
-        $cmd .= ' ' . implode(' ', array_map('escapeshellarg', $objectFiles));
-        
+        // 添加目标文件（通过 Response File 避免命令行过长）
+        $cmd .= ' ' . $this->createResponseFile($objectFiles, $outputFile);
+
         // 输出文件
         $cmd .= ' /OUT:' . escapeshellarg($outputFile);
         
@@ -179,7 +179,7 @@ class Msvc extends CompilerBackend
     public function buildLinkCommand(array $objectFiles, string $outputFile, array $options = []): string
     {
         $cmd = $this->getLinkerCommand();
-        $cmd .= ' ' . implode(' ', array_map('escapeshellarg', $objectFiles));
+        $cmd .= ' ' . $this->createResponseFile($objectFiles, $outputFile);
         $cmd .= ' /OUT:' . escapeshellarg($outputFile);
 
         if (!empty($options['library_paths'])) {