--- a/qt5.SlackBuild	2023-07-01 13:38:40.212964533 +0300
+++ b/qt5.SlackBuild	2023-07-01 13:49:55.355763684 +0300
@@ -81,6 +81,16 @@ elif [ "$ARCH" = "armv7hl" ]; then
   SLKCFLAGS="-O2 -march=armv7-a -mfpu=vfpv3-d16 -fno-strict-volatile-bitfields"
   SLKLDFLAGS=""
   LIBDIRSUFFIX=""
+elif [ "$ARCH" = "aarch64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  SLKLDFLAGS=""
+  SLKLDFLAGS="-L/usr/lib64"
+  LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "riscv64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  SLKLDFLAGS="-latomic"
+  SLKLDFLAGS="-L/usr/lib64"
+  LIBDIRSUFFIX="64"
 else
   SLKCFLAGS="-O2"
   SLKLDFLAGS=""
@@ -153,6 +163,22 @@ cd qtbase
   zcat $CWD/patches/qt5.qtbase_cmake_isystem_includes.patch.gz | patch -p1 --verbose || exit 1
 cd - 1>/dev/null
 
+# Fix sandbox functions for glibc-2.33:
+cd qtwebengine
+  zcat $CWD/patches/qtwebengine-everywhere-src-5.15.2-%231904652.patch.gz | patch -p1 --verbose || exit 1
+  zcat $CWD/patches/qtwebengine-mips-ppc-riscv-s390-support.diff.gz | patch -p1 --verbose || exit 1
+  zcat $CWD/patches/qtwebengine-mips32-limit-mksnapshot-memory.diff.gz | patch -p1 --verbose || exit 1
+  zcat $CWD/patches/qtwebengine-bigendian.diff.gz | patch -p1 --verbose || exit 1
+  tar xvf $CWD/patches/qtwebengine-mips-ppc-riscv-s390-newfiles.tar.gz
+cd - 1>/dev/null
+
+# Apply upstream patch to move the wayland socket polling to a separate event
+# thread. This greatly improves the behavior of Plasma Wayland sessions, fixing
+# (for example) stuttering that was occuring on multimedia applications.
+cd qtwayland
+  zcat $CWD/patches/24.diff.gz | patch -p1 --verbose || exit 1
+cd - 1>/dev/null
+
 # If PulseAudio is not found, use the _alsa $TAG and disable it in the build:
 if ! pkg-config --exists libpulse 2>/dev/null ; then
   PULSEAUDIO_OPTION="-no-pulseaudio -no-webengine-pulseaudio"