initial commit for macOS support

src/SPC/builder/macos/SystemUtil.php

@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\macos;
+
+use SPC\builder\traits\UnixSystemUtilTrait;
+use SPC\exception\RuntimeException;
+
+class SystemUtil
+{
+    /** macOS 兼容 unix 的系统工具 */
+    use UnixSystemUtilTrait;
+
+    /**
+     * 获取系统 CPU 逻辑内核数
+     *
+     * @throws RuntimeException
+     */
+    public static function getCpuCount(): int
+    {
+        f_exec('sysctl -n hw.ncpu', $output, $ret);
+        if ($ret !== 0) {
+            throw new RuntimeException('Failed to get cpu count');
+        }
+
+        return (int) $output[0];
+    }
+
+    /**
+     * 获取不同架构对应的 cflags 参数
+     *
+     * @throws RuntimeException
+     */
+    public static function getArchCFlags(string $arch): string
+    {
+        return match ($arch) {
+            'x86_64' => '--target=x86_64-apple-darwin',
+            'arm64','aarch64' => '--target=arm64-apple-darwin',
+            default => throw new RuntimeException('unsupported arch: ' . $arch),
+        };
+    }
+}