Update

3rdparty/libyuv/riscv_script/prepare_toolchain_qemu.sh

@@ -0,0 +1,74 @@
+#!/bin/bash
+set -ev
+
+# Download & build RISC-V Clang toolchain & QEMU emulator. 
+# RISC-V Clang is for cross compile with  the RISC-V Vector ISA.
+# RISC-V QEMU is used to run the test suite.
+#
+# Requirements: Linux host w/ working C++ compiler, git, cmake, ninja, wget, tar
+
+# NOTE: this script must be run from the top-level directory of the LIBYUV_SRC_DIR.
+
+RISCV_TRIPLE="riscv64-unknown-linux-gnu"
+RISCV_QEMU="qemu-riscv64"
+
+LIBYUV_SRC_DIR=$(pwd)
+BUILD_DIR="$LIBYUV_SRC_DIR"/build-toolchain-qemu
+INSTALL_QEMU="$BUILD_DIR"/riscv-qemu
+INSTALL_CLANG="$BUILD_DIR"/riscv-clang
+
+LLVM_VERSION="16.0.0"
+LLVM_NAME=llvm-project-"$LLVM_VERSION".src
+
+RISCV_GNU_TOOLCHAIN="$BUILD_DIR"/riscv-gnu-toolchain
+RISCV_CLANG_TOOLCHAIN="$BUILD_DIR"/"$LLVM_NAME"
+
+QEMU_NAME="qemu-7.0.0"
+
+mkdir -p "$BUILD_DIR"
+cd "$BUILD_DIR"
+
+# Download and install RISC-V GNU Toolchain (needed to build Clang)
+if [ ! -d "$RISCV_GNU_TOOLCHAIN" ]
+then
+  git clone git@github.com:riscv/riscv-gnu-toolchain.git
+  pushd "$RISCV_GNU_TOOLCHAIN"
+  git submodule update --init --recursive
+  ./configure --with-cmodel=medany --prefix="$INSTALL_CLANG"
+  ionice nice make linux -j `nproc` install
+  popd
+fi
+
+# Download Clang toolchain & build cross compiler
+if [ ! -d "$RISCV_CLANG_TOOLCHAIN" ]
+then
+  wget https://github.com/llvm/llvm-project/releases/download/llvmorg-"$LLVM_VERSION"/"$LLVM_NAME".tar.xz
+  tar xvJf "$LLVM_NAME".tar.xz
+  pushd "$RISCV_CLANG_TOOLCHAIN"
+	cmake -DCMAKE_INSTALL_PREFIX="$INSTALL_CLANG" \
+      -DCMAKE_BUILD_TYPE=Release \
+      -DLLVM_TARGETS_TO_BUILD="RISCV" \
+      -DLLVM_ENABLE_PROJECTS="clang" \
+      -DLLVM_DEFAULT_TARGET_TRIPLE="$RISCV_TRIPLE" \
+      -DLLVM_INSTALL_TOOLCHAIN_ONLY=On \
+      -DDEFAULT_SYSROOT=../sysroot \
+      -G "Ninja" "$RISCV_CLANG_TOOLCHAIN"/llvm
+	ionice nice ninja -j `nproc`
+	ionice nice ninja -j `nproc` install
+  popd
+  pushd "$INSTALL_CLANG"/bin
+  ln -sf clang "$RISCV_TRIPLE"-clang
+  ln -sf clang++ "$RISCV_TRIPLE"-clang++
+  popd
+fi
+
+# Download QEMU and build the riscv64 Linux usermode emulator
+if [ ! -d "$QEMU_NAME" ]
+then
+  wget https://download.qemu.org/"$QEMU_NAME".tar.xz
+  tar xvJf "$QEMU_NAME".tar.xz
+  pushd "$QEMU_NAME"
+  ./configure --target-list=riscv64-linux-user --prefix="$INSTALL_QEMU"
+  ionice nice make -j `nproc` install
+  popd
+fi