refactor to pkg-config and add some add-on libs for gd

src/SPC/builder/unix/library/zlib.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\unix\library;
+
+trait zlib
+{
+    protected function build()
+    {
+        [,,$destdir] = SEPARATED_PATH;
+
+        shell()->cd($this->source_dir)
+            ->exec("{$this->builder->configure_env} ./configure --static --prefix=")
+            ->exec('make clean')
+            ->exec("make -j{$this->builder->concurrency}")
+            ->exec("make install DESTDIR={$destdir}");
+        $this->patchPkgconfPrefix(['zlib.pc']);
+    }
+}