sodium ext support.

src/SPC/builder/linux/library/libsodium.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\linux\library;
+
+class libsodium extends LinuxLibraryBase
+{
+    use \SPC\builder\unix\library\libsodium;
+
+    public const NAME = 'libsodium';
+}

src/SPC/builder/macos/library/libsodium.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\macos\library;
+
+class libsodium extends MacOSLibraryBase
+{
+    use \SPC\builder\unix\library\libsodium;
+
+    public const NAME = 'libsodium';
+}

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

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\unix\library;
+
+trait libsodium
+{
+    protected function build()
+    {
+        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=' . BUILD_ROOT_PATH);
+    }
+}