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

src/SPC/builder/unix/library/libssh2.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\unix\library;
+
+use SPC\store\FileSystem;
+
+trait libssh2
+{
+    protected function build()
+    {
+        $enable_zlib = $this->builder->getLib('zlib') !== null ? 'ON' : 'OFF';
+
+        FileSystem::resetDir($this->source_dir . '/build');
+        shell()->cd($this->source_dir . '/build')
+            ->exec(
+                "{$this->builder->configure_env} " . ' cmake ' .
+                "{$this->builder->makeCmakeArgs()} " .
+                '-DBUILD_SHARED_LIBS=OFF ' .
+                '-DBUILD_EXAMPLES=OFF ' .
+                '-DBUILD_TESTING=OFF ' .
+                "-DENABLE_ZLIB_COMPRESSION={$enable_zlib} " .
+                '..'
+            )
+            ->exec("cmake --build . -j {$this->builder->concurrency} --target libssh2")
+            ->exec('make install DESTDIR=' . BUILD_ROOT_PATH);
+        $this->patchPkgconfPrefix(['libssh2.pc']);
+    }
+}