It&#x27;s not only CPU architectures, but also operating systems.<p>For instance the `-akeyword`(HP&#x2F;UX compat), `-z`, `-Y` (Solaris compat), `-assert` (SunOS compat) `-Qy` (System V Release 4 compat) options in GNU `ld` (<a href="http:&#x2F;&#x2F;ftp.gnu.org&#x2F;old-gnu&#x2F;Manuals&#x2F;ld-2.9.1&#x2F;html_mono&#x2F;ld.html" rel="nofollow">http:&#x2F;&#x2F;ftp.gnu.org&#x2F;old-gnu&#x2F;Manuals&#x2F;ld-2.9.1&#x2F;html_mono&#x2F;ld.htm...</a>)<p>Then there&#x27;s also compatibility with MRI linkers in GNU ld