--- a/a52dec.SlackBuild	2021-02-13 03:04:22.900063754 +0200
+++ b/a52dec.SlackBuild	2021-02-13 03:05:40.936023890 +0200
@@ -57,6 +57,12 @@
 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=""
@@ -78,6 +84,10 @@
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \+
 
+xzcat $CWD/a52dec-configure-optflags.patch.xz | patch -p1 --verbose || exit 1
+xzcat $CWD/a52dec-0.7.4-rpath64.patch.xz | patch -p1 --verbose || exit 1
+xzcat $CWD/liba52-silence.patch.xz | patch -p1 --verbose || exit 1
+
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 ./configure \