<p>Yes, I know where it is set. I just don't get the purpose of the macro. It was added in 2001 with commit <a class="commit-link" data-hovercard-type="commit" data-hovercard-url="https://github.com/rpm-software-management/rpm/commit/1a5a027bcc8071a3b50f726bf8a3e93cd770ef1d/hovercard" href="https://github.com/rpm-software-management/rpm/commit/1a5a027bcc8071a3b50f726bf8a3e93cd770ef1d"><tt>1a5a027</tt></a>. We have:</p>
<ul>
<li>_arch</li>
<li>_build_arch</li>
<li>_build_cpu</li>
<li>_host_cpu</li>
<li>_target_cpu</li>
</ul>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br />You are receiving this because you are subscribed to this thread.<br />Reply to this email directly, <a href="https://github.com/rpm-software-management/rpm/issues/791?email_source=notifications&email_token=ADLPZUYPDP475WMONWJWRATQAWOG7A5CNFSM4ICJ2NKKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2PWCRA#issuecomment-513761604">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/ADLPZU6RJO72ZU7XVMBXVS3QAWOG7ANCNFSM4ICJ2NKA">mute the thread</a>.<img src="https://github.com/notifications/beacon/ADLPZUYOD57KYQLWKLWF5ZLQAWOG7A5CNFSM4ICJ2NKKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2PWCRA.gif" height="1" width="1" alt="" /></p>
<script type="application/ld+json">[
{
"@context": "http://schema.org",
"@type": "EmailMessage",
"potentialAction": {
"@type": "ViewAction",
"target": "https://github.com/rpm-software-management/rpm/issues/791?email_source=notifications\u0026email_token=ADLPZUYPDP475WMONWJWRATQAWOG7A5CNFSM4ICJ2NKKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2PWCRA#issuecomment-513761604",
"url": "https://github.com/rpm-software-management/rpm/issues/791?email_source=notifications\u0026email_token=ADLPZUYPDP475WMONWJWRATQAWOG7A5CNFSM4ICJ2NKKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD2PWCRA#issuecomment-513761604",
"name": "View Issue"
},
"description": "View this Issue on GitHub",
"publisher": {
"@type": "Organization",
"name": "GitHub",
"url": "https://github.com"
}
}
]</script>