Fix C++ linking: use builder extra-libs instead of configure string replacement

The previous approach tried to patch the configure script string which
was fragile and didn't work on all platforms. Now uses the proper
builder option mechanism (same pattern as iconv extension).

Uses -lc++ on macOS (Clang) and -lstdc++ on Linux (GCC/musl).

Author: Hendrik Mennen

src/SPC/builder/extension/glfw.php

@@ -23,14 +23,12 @@ public function patchBeforeBuildconf(): bool
     public function patchBeforeConfigure(): bool
     {
         FileSystem::replaceFileStr(SOURCE_PATH . '/php-src/configure', '-lglfw ', '-lglfw3 ');
-        if (PHP_OS_FAMILY === 'Darwin') {
-            // C++ standard library needed for ogt_vox_c_wrapper.cpp
-            FileSystem::replaceFileStr(
-                SOURCE_PATH . '/php-src/configure',
-                '-framework IOKit',
-                '-framework IOKit -lc++'
-            );
-        }
+
+        // ogt_vox_c_wrapper.cpp requires the C++ standard library
+        $cxxLib = PHP_OS_FAMILY === 'Darwin' ? '-lc++' : '-lstdc++';
+        $extraLibs = trim($this->builder->getOption('extra-libs', '') . ' ' . $cxxLib);
+        $this->builder->setOption('extra-libs', $extraLibs);
+
         return true;
     }