<p></p>
<p><b>@fjmolinas</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/16719#discussion_r697839169">makefiles/vars.inc.mk</a>:</p>
<pre style='color:#555'>> @@ -19,6 +19,7 @@ export MCU                   # The MCU, set by the board's Makefile.include, or
 export INCLUDES              # The extra include paths, set by the various Makefile.include files.
 export CXXINCLUDES           # The extra include paths for c++, set by the various Makefile.include files.
 export NATIVEINCLUDES        # The native include paths, set by the various native Makefile.include files.
+export DEVELHELP             # Set to 1 to enable code in RIOT that does safety checking which is not needed in a production environment but helps in the development process.
</pre>
<p>Hmmm...why is this being exported?</p>

<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/RIOT-OS/RIOT/pull/16719#pullrequestreview-741005181">view it on GitHub</a>, or <a href="https://github.com/notifications/unsubscribe-auth/ABE7WYBAAYDZ36NQOUK435LT7CPVPANCNFSM5B2GYGCA">unsubscribe</a>.<br />Triage notifications on the go with GitHub Mobile for <a href="https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675">iOS</a> or <a href="https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub">Android</a>.
<img src="https://github.com/notifications/beacon/ABE7WYBPVC6MZABLDU4DQQTT7CPVPA5CNFSM5B2GYGCKYY3PNVWWK3TUL52HS4DFWFIHK3DMKJSXC5LFON2FEZLWNFSXPKTDN5WW2ZLOORPWSZGOFQVNO7I.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/RIOT-OS/RIOT/pull/16719#pullrequestreview-741005181",
"url": "https://github.com/RIOT-OS/RIOT/pull/16719#pullrequestreview-741005181",
"name": "View Pull Request"
},
"description": "View this Pull Request on GitHub",
"publisher": {
"@type": "Organization",
"name": "GitHub",
"url": "https://github.com"
}
}
]</script>