diff --git a/config/ext.json b/config/ext.json
index 1e65910a..664dba9f 100644
--- a/config/ext.json
+++ b/config/ext.json
@@ -111,7 +111,7 @@
     },
     "iconv": {
         "type": "builtin",
-        "arg-type": "with",
+        "arg-type": "custom",
         "lib-depends-windows": [
             "libiconv"
         ]
diff --git a/ext-support.md b/ext-support.md
index f54fc014..c84a3a33 100644
--- a/ext-support.md
+++ b/ext-support.md
@@ -8,20 +8,20 @@
 |            | Linux                                                              | macOS                                                              | Windows |
 |------------|--------------------------------------------------------------------|--------------------------------------------------------------------|---------|
 | bcmath     | yes                                                                | yes                                                                |         |
-| bz2        | yes                                                                | untested                                                           |         |
+| bz2        | yes                                                                | yes                                                                |         |
 | calendar   | yes                                                                | yes                                                                |         |
 | ctype      | yes                                                                | yes                                                                |         |
 | curl       | untested                                                           | yes                                                                |         |
 | date       | yes                                                                | yes                                                                |         | 
 | dba        | yes                                                                | yes                                                                |         | 
-| dom        | untested                                                           | untested                                                           |         |
+| dom        | yes                                                                | yes                                                                |         |
 | enchant    |                                                                    |                                                                    |         |
 | event      |                                                                    |                                                                    |         |
 | exif       | yes                                                                | yes                                                                |         |
 | filter     | yes                                                                | yes                                                                |         |
 | fileinfo   | yes                                                                |                                                                    |         |
 | ftp        | yes                                                                | yes                                                                |         |
-| gd         | untested                                                           | untested                                                           |         |
+| gd         | untested                                                           | yes                                                                |         |
 | gettext    |                                                                    |                                                                    |         |
 | gmp        | untested                                                           | untested                                                           |         |
 | hash       | yes                                                                | yes                                                                |         |
@@ -33,7 +33,7 @@
 | mysqli     |                                                                    |                                                                    |         |
 | mysqlnd    | yes                                                                | yes                                                                |         |
 | openssl    | untested                                                           | yes                                                                |         |
-| pcntl      | untested                                                           | untested                                                           |         |
+| pcntl      | untested                                                           | yes                                                                |         |
 | pdo        | yes                                                                | yes                                                                |         |
 | pdo_mysql  | yes                                                                | yes                                                                |         |
 | pdo_sqlite | yes                                                                | yes                                                                |         |
@@ -47,7 +47,7 @@
 | shmop      | untested                                                           |                                                                    |         |
 | simplexml  | untested                                                           | untested                                                           |         |
 | soap       | untested                                                           |                                                                    |         |
-| sockets    | untested                                                           |                                                                    |         |
+| sockets    | untested                                                           | yes                                                                |         |
 | sqlite3    | untested                                                           | untested                                                           |         |
 | swow       |                                                                    |                                                                    |         |
 | swoole     | [faulty](https://github.com/crazywhalecc/static-php-cli/issues/32) | [faulty](https://github.com/crazywhalecc/static-php-cli/issues/32) |         |
diff --git a/src/SPC/builder/Extension.php b/src/SPC/builder/Extension.php
index 8066447a..d6f999b0 100644
--- a/src/SPC/builder/Extension.php
+++ b/src/SPC/builder/Extension.php
@@ -183,6 +183,9 @@ class Extension
                     $arg .= ' --with-event-openssl --with-openssl-dir="' . BUILD_ROOT_PATH . '"';
                 }
                 break;*/
+            case 'iconv':
+                $arg = ' --with-iconv="' . BUILD_ROOT_PATH . '"';
+                break;
             case 'mbstring':
                 $arg = ' --disable-mbregex ONIG_CFLAGS=-I"' . BUILD_ROOT_PATH . '" ' .
                 'ONIG_LIBS="' . $this->getLibFilesString() . '" ';
diff --git a/src/SPC/builder/macos/library/libiconv.php b/src/SPC/builder/macos/library/libiconv.php
new file mode 100644
index 00000000..f8e603f3
--- /dev/null
+++ b/src/SPC/builder/macos/library/libiconv.php
@@ -0,0 +1,47 @@
+<?php
+/**
+ * Copyright (c) 2022 Yun Dou <dixyes@gmail.com>
+ *
+ * lwmbs is licensed under Mulan PSL v2. You can use this
+ * software according to the terms and conditions of the
+ * Mulan PSL v2. You may obtain a copy of Mulan PSL v2 at:
+ *
+ * http://license.coscl.org.cn/MulanPSL2
+ *
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
+ * WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ *
+ * See the Mulan PSL v2 for more details.
+ */
+
+declare(strict_types=1);
+
+namespace SPC\builder\macos\library;
+
+use SPC\exception\RuntimeException;
+
+class libiconv extends MacOSLibraryBase
+{
+    public const NAME = 'libiconv';
+
+    /**
+     * @throws RuntimeException
+     */
+    public function build()
+    {
+        [,,$destdir] = SEPARATED_PATH;
+
+        shell()->cd($this->source_dir)
+            ->exec(
+                "{$this->builder->configure_env} ./configure " .
+                '--enable-static ' .
+                '--disable-shared ' .
+                '--prefix='
+            )
+            ->exec('make clean')
+            ->exec("make -j{$this->builder->concurrency}")
+            ->exec('make install DESTDIR=' . $destdir);
+    }
+}
diff --git a/src/globals/tests/dom.php b/src/globals/tests/dom.php
index 6f18bdbf..cf16d573 100644
--- a/src/globals/tests/dom.php
+++ b/src/globals/tests/dom.php
@@ -2,4 +2,9 @@
 
 declare(strict_types=1);
 
-exit(class_exists('\\DOMDocument') ? 0 : 1);
+if (!class_exists('\\DOMDocument')) {
+    exit(1);
+}
+$doc = new DOMDocument();
+$doc->loadHtml("<html><head><meta charset=\"UTF-8\"><meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"></head><body id='app'>Hello</body></html>");
+exit($doc->getElementById('app')->nodeValue === 'Hello' ? 0 : 1);
diff --git a/src/globals/tests/gd.php b/src/globals/tests/gd.php
new file mode 100644
index 00000000..dc6b5176
--- /dev/null
+++ b/src/globals/tests/gd.php
@@ -0,0 +1,8 @@
+<?php
+
+declare(strict_types=1);
+
+$info = gd_info();
+$true = $info['JPEG Support'] ?? false;
+$true = $true ? ($info['PNG Support'] ?? false) : false;
+exit($true ? 0 : 1);