Do some code quality check and fix #126

src/SPC/builder/extension/iconv.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\extension;
+
+use SPC\builder\Extension;
+use SPC\util\CustomExt;
+
+#[CustomExt('iconv')]
+class iconv extends Extension
+{
+    public function patchBeforeConfigure(): bool
+    {
+        // macOS need to link iconv dynamically, we add it to extra-libs
+        $extra_libs = $this->builder->getOption('extra-libs', '');
+        if (!str_contains($extra_libs, '-liconv')) {
+            $extra_libs .= ' -liconv';
+        }
+        $this->builder->setOption('extra-libs', $extra_libs);
+        return true;
+    }
+}