--- a/net-tools.SlackBuild	2021-02-13 01:52:38.073015774 +0200
+++ b/net-tools.SlackBuild	2021-02-13 01:53:15.501008219 +0200
@@ -57,6 +57,10 @@
   SLKCFLAGS="-O2"
 elif [ "$ARCH" = "x86_64" ]; then
   SLKCFLAGS="-O2 -fPIC"
+elif [ "$ARCH" = "aarch64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+elif [ "$ARCH" = "riscv64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
 else
   SLKCFLAGS="-O2"
 fi
@@ -75,6 +79,16 @@
   \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
   -exec chmod 644 {} \+
 
+# Patch to fix FTBFS:
+sed -i 's? HAVE_HWSTRIP 1? HAVE_HWSTRIP 0?g' config.h
+# http://lists.linuxfromscratch.org/pipermail/blfs-support/2012-August/070428.html
+find -name "*.c" -o -name "*.h" | while read src; do
+   sed -i "s?<linux/if_ether.h>?<netinet/if_ether.h>?g" $src
+   sed -i "s?<linux/if_tr.h>?<netinet/if_tr.h>?g" $src
+   sed -i "s?<linux/if_fddi.h>?<netinet/if_fddi.h>?g" $src
+   sed -i "s?<netinet/ip.h>?<linux/ip.h>?g" $src
+done
+
 mkdir -p $PKG/usr/doc/net-tools-$VERSION
 cp -a \
   COPYING* INSTALLING README* THANKS TODO \