add readline support

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

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\unix\library;
+
+trait readline
+{
+    protected function build()
+    {
+        shell()->cd($this->source_dir)
+            ->exec(
+                "{$this->builder->configure_env} ./configure " .
+                '--enable-static=yes ' .
+                '--enable-shared=no ' .
+                '--prefix= ' .
+                '--with-curses ' .
+                '--enable-multibyte=yes'
+            )
+            ->exec('make clean')
+            ->exec("make -j{$this->builder->concurrency}")
+            ->exec('make install DESTDIR=' . BUILD_ROOT_PATH);
+        $this->patchPkgconfPrefix(['readline.pc']);
+    }
+}