--- a/lrzip.SlackBuild	2021-02-22 09:27:26.514631343 +0200
+++ b/lrzip.SlackBuild	2021-02-22 09:32:53.406395851 +0200
@@ -55,6 +55,12 @@
 elif [ "$ARCH" = "x86_64" ]; then
   SLKCFLAGS="-O2 -fPIC"
   LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "aarch64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "riscv64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
 else
   SLKCFLAGS="-O2"
   LIBDIRSUFFIX=""
@@ -77,6 +83,8 @@
   \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
   -exec chmod 644 {} \+
 
+[[ "$ARCH" == "aarch64" || "$ARCH" == "riscv64" ]] && OPTIONS="--disable-asm"
+
 CFLAGS="$SLKCFLAGS" \
 ./configure \
   --prefix=/usr \
@@ -85,6 +93,7 @@
   --mandir=/usr/man \
   --docdir=/usr/doc/$PKGNAM-$VERSION \
   --disable-static \
+  $OPTIONS \
   --build=$ARCH-slackware-linux || exit 1
 
 make $NUMJOBS || make || exit 1