Put extension and library compatibility checks before compilation (#451)

src/SPC/builder/extension/parallel.php

@@ -11,11 +11,10 @@ use SPC\util\CustomExt;
 #[CustomExt('parallel')]
 class parallel extends Extension
 {
-    public function getConfigureArg(): string
+    public function validate(): void
     {
         if (!$this->builder->getOption('enable-zts')) {
             throw new WrongUsageException('ext-parallel must be built with ZTS builds. Use "--enable-zts" option!');
         }
-        return parent::getConfigureArg(); // TODO: Change the autogenerated stub
     }
 }