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

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

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\unix\library;
+
+trait libwebp
+{
+    protected function build()
+    {
+        [,,$destdir] = SEPARATED_PATH;
+
+        shell()->cd($this->source_dir)
+            ->exec('./autogen.sh')
+            ->exec(
+                "{$this->builder->configure_env} ./configure " .
+                '--enable-static ' .
+                '--disable-shared ' .
+                '--prefix= ' .
+                '--enable-libwebpdecoder ' .
+                '--enable-libwebpextras ' .
+                '--disable-tiff ' .
+                '--disable-gl ' .
+                '--disable-sdl ' .
+                '--disable-wic'
+            )
+            ->exec('make clean')
+            ->exec("make -j{$this->builder->concurrency}")
+            ->exec('make install DESTDIR=' . $destdir);
+        $this->patchPkgconfPrefix(['libsharpyuv.pc', 'libwebp.pc', 'libwebpdecoder.pc', 'libwebpdemux.pc', 'libwebpmux.pc'], PKGCONF_PATCH_PREFIX);
+    }
+}