--- a/llvm.SlackBuild	2023-09-30 01:51:01.252515847 +0300
+++ b/llvm.SlackBuild	2023-09-30 01:57:17.598534225 +0300
@@ -51,6 +51,27 @@ if [ -z "$ARCH" ]; then
   esac
 fi
 
+# Building lldb will be determined automatically unless BUILD_LLDB is
+# preset to YES or NO:
+if [ -z $BUILD_LLDB ]; then
+  if [ "$ARCH" = "riscv64" ]; then
+    BUILD_LLDB=NO
+  else
+    BUILD_LLDB=YES
+  fi
+fi
+
+# Building OpenMP will be determined automatically unless BUILD_OPENMP is
+# preset to YES or NO:
+if [ -z $BUILD_OPENMP ]; then
+  if [ "$ARCH" = "riscv64" ]; then
+    # OpenMP not supported on RISC-V
+    BUILD_OPENMP=NO
+  else
+    BUILD_OPENMP=YES
+  fi
+fi
+
 # If the variable PRINT_PACKAGE_NAME is set, then this script will report what
 # the name of the created package would be, and then exit. This information
 # could be useful to other scripts.
@@ -67,6 +88,8 @@ BUILDDIR=${TMP}/llvm-build-${VERSION}
 # massive warning spew:
 IGNORE_GNU_EXTENSIONS=${IGNORE_GNU_EXTENSIONS:--Wno-unknown-warning-option -Wno-gnu-line-marker -Wno-gnu-anonymous-struct -Wno-gnu-include-next}
 
+LINKER="lld"
+
 if [ "$ARCH" = "i586" ]; then
   SLKCFLAGS="-O2 -march=i586 -mtune=i686 $IGNORE_GNU_EXTENSIONS"
   LIBDIRSUFFIX=""
@@ -76,11 +99,23 @@ elif [ "$ARCH" = "i686" ]; then
 elif [ "$ARCH" = "x86_64" ]; then
   SLKCFLAGS="-O2 -fPIC $IGNORE_GNU_EXTENSIONS"
   LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "aarch64" ]; then
+  SLKCFLAGS="-O2 -fPIC $IGNORE_GNU_EXTENSIONS"
+  LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "riscv64" ]; then
+  SLKCFLAGS="-O2 -fPIC $IGNORE_GNU_EXTENSIONS"
+  LIBDIRSUFFIX="64"
+  CMAKE_EXTRA="-DCMAKE_SHARED_LINKER_FLAGS=-latomic"
+  LINKER="bfd"
 else
   SLKCFLAGS="-O2 $IGNORE_GNU_EXTENSIONS"
   LIBDIRSUFFIX=""
 fi
 
+# Choose a compiler (gcc/g++ or clang/clang++):
+export CC=${CC:-clang}
+export CXX=${CXX:-clang++}
+
 # Building clangd will be determined automatically unless BUILD_CLANG is
 # preset to YES or NO:
 if [ -z $BUILD_CLANGD ]; then
@@ -136,8 +171,10 @@ cd $PKGNAM-${VERSION}.src/tools || cd $P
   #tar xf $CWD/flang-$VERSION.src.tar.xz || exit 1
   #mv flang-${VERSION} flang 2>/dev/null || mv flang-${VERSION}.src flang || exit 1
   echo "Extracting $CWD/lldb-$VERSION.src.tar.xz..."
-  tar xf $CWD/lldb-$VERSION.src.tar.xz || exit 1
-  mv lldb-${VERSION} lldb 2>/dev/null || mv lldb-${VERSION}.src lldb || exit 1
+  if [ "$BUILD_LLDB" = "YES" ]; then
+    tar xf $CWD/lldb-$VERSION.src.tar.xz || exit 1
+    mv lldb-${VERSION} lldb 2>/dev/null || mv lldb-${VERSION}.src lldb || exit 1
+  fi
   echo "Extracting $CWD/lld-$VERSION.src.tar.xz..."
   tar xf $CWD/lld-$VERSION.src.tar.xz || exit 1
   mv lld-${VERSION} lld 2>/dev/null || mv lld-${VERSION}.src lld || exit 1
@@ -157,6 +194,10 @@ cd projects || exit 1
   echo "Extracting $CWD/openmp-$VERSION.src.tar.xz..."
   tar xf $CWD/openmp-$VERSION.src.tar.xz || exit 1
   mv openmp-${VERSION} openmp 2>/dev/null || mv openmp-${VERSION}.src openmp || exit 1
+  if [ "$BUILD_OPENMP" = "YES" ]; then
+    tar xf $CWD/openmp-$VERSION.src.tar.xz || exit 1
+    mv openmp-${VERSION} openmp 2>/dev/null || mv openmp-${VERSION}.src openmp || exit 1
+  fi
   echo "Extracting $CWD/libcxx-${VERSION}.src.tar.xz..."
   tar xf $CWD/libcxx-${VERSION}.src.tar.xz || exit 1
   mv libcxx-${VERSION} libcxx 2>/dev/null || mv libcxx-${VERSION}.src libcxx || exit 1
@@ -175,6 +216,12 @@ cd ../
 # Support GCC built for i586-slackware-linux:
 zcat $CWD/clang.toolchains.i586.triple.diff.gz | patch -p1 --verbose || exit 1
 
+xzcat $CWD/clang.dynamic.linker.aarch64.patch.xz | patch -p1 --verbose || exit 1
+xzcat $CWD/clang.toolchains.aarch64.triple.patch.xz | patch -p1 --verbose || exit 1
+
+xzcat $CWD/clang.dynamic.linker.riscv64.patch.xz | patch -p1 --verbose || exit 1
+xzcat $CWD/clang.toolchains.riscv64.triple.patch.xz | patch -p1 --verbose || exit 1
+
 # We require libatomic on 32-bit platforms:
 if [ -f ./tools/lldb/source/Utility/CMakeLists.txt ]; then
   if [ "$ARCH" = "i586" -o "$ARCH" = "i686" ]; then
@@ -194,6 +241,15 @@ cd projects
 ln -sf ../../cmake .
 cd -
 
+# Patch invalid conversion from unwind state:
+zcat $CWD/unwind_state_invalid_conversion.diff.gz | patch -p1 --verbose || exit 1
+
+# Patch riscv64: AllWinner D1 does not have fence.tso instruction:
+zcat $CWD/riscv64-no-fence.tso.diff.gz | patch -p1 --verbose || exit 1
+
+# Patch alpha: Fix invalid variable name __alpha:
+zcat $CWD/alpha_fix_variable_name.diff.gz | patch -p1 --verbose || exit 1
+
 chown -R root:root .
 find . \
   \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 -o -perm 511 \) \
@@ -218,8 +274,8 @@ cd build
   # Nuke LLVM libunwind as it conflicts with the one already on the system:
   rm -r ../projects/libunwind
   cmake -GNinja \
-    -DCMAKE_C_COMPILER="clang" \
-    -DCMAKE_CXX_COMPILER="clang++" \
+    -DCMAKE_C_COMPILER="$CC" \
+    -DCMAKE_CXX_COMPILER="$CXX" \
     -DCMAKE_C_FLAGS:STRING="$SLKCFLAGS" \
     -DCMAKE_CXX_FLAGS:STRING="$SLKCFLAGS" \
     -DCMAKE_INSTALL_PREFIX=/usr \
@@ -228,7 +284,7 @@ cd build
     -DLIBCXXABI_LIBDIR_SUFFIX=${LIBDIRSUFFIX} \
     -DCMAKE_BUILD_TYPE=Release \
     $SHARED_LIBRARY_OPTIONS \
-    -DLLVM_USE_LINKER=lld \
+    -DLLVM_USE_LINKER=$LINKER \
     -DLLVM_ENABLE_RTTI=ON \
     -DLLVM_ENABLE_FFI=ON \
     -DLLVM_ENABLE_ZLIB=ON \
@@ -244,6 +300,7 @@ cd build
     -DCLANG_DEFAULT_PIE_ON_LINUX=ON \
     -DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=ON \
     $CLANGD \
+    $CMAKE_EXTRA \
     ..  || exit 1
 
   "${NINJA:=ninja}" $NUMJOBS || exit 1
@@ -286,8 +343,10 @@ python -m compileall "$PKG/usr/lib$LIBDI
 python -O -m compileall "$PKG/usr/lib$LIBDIRSUFFIX/python${PY2}/site-packages/clang"
 python3 -m compileall "$PKG/usr/lib$LIBDIRSUFFIX/python${PY3}/site-packages/clang"
 python3 -O -m compileall "$PKG/usr/lib$LIBDIRSUFFIX/python${PY3}/site-packages/clang"
-python -m compileall "$PKG/usr/lib$LIBDIRSUFFIX/python${PY2}/site-packages/lldb"
-python -O -m compileall "$PKG/usr/lib$LIBDIRSUFFIX/python${PY2}/site-packages/lldb"
+if [ "$BUILD_LLDB" = "YES" ]; then
+  python -m compileall "$PKG/usr/lib$LIBDIRSUFFIX/python${PY2}/site-packages/lldb"
+  python -O -m compileall "$PKG/usr/lib$LIBDIRSUFFIX/python${PY2}/site-packages/lldb"
+fi
 python -m compileall "$PKG/usr/share/scan-view"
 python -O -m compileall "$PKG/usr/share/scan-view"
 python -m compileall "$PKG/usr/share/clang"