--- ./tools/clang/lib/Driver/ToolChains/Gnu.cpp.orig	2021-09-24 11:18:10.000000000 -0500
+++ ./tools/clang/lib/Driver/ToolChains/Gnu.cpp	2021-10-05 14:17:02.597518687 -0500
@@ -2114,6 +2114,7 @@
       "i586-linux-gnu",     "i686-linux-gnu",
       "i686-pc-linux-gnu",  "i386-redhat-linux6E",
       "i686-redhat-linux",  "i386-redhat-linux",
+      "i586-slackware-linux",  "i686-slackware-linux",
       "i586-suse-linux",    "i686-montavista-linux",
       "i686-linux-android", "i686-gnu",
   };