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#!/usr/bin/env bash
set -e
# Checkout LLVM sources
git clone --filter=blob:none --depth=1 --branch llvmorg-19.1.6 --no-checkout https://github.com/llvm/llvm-project.git llvm-project
cd llvm-project
git sparse-checkout set --cone
git checkout llvmorg-19.1.6
git sparse-checkout set cmake llvm/cmake runtimes libcxx libcxxabi
cd ..
## Setup libc++ options
if [ -z "$BUILD_32_BITS" ]; then
export BUILD_32_BITS=OFF && echo disabling 32 bit build
fi
## Build and install libc++ (Use unstable ABI for better sanitizer coverage)
mkdir llvm-build && cd llvm-build
cmake -GNinja \
-DCMAKE_C_COMPILER=${CC} \
-DCMAKE_CXX_COMPILER=${CXX} \
-DCMAKE_BUILD_TYPE=RelWithDebInfo \
-DCMAKE_INSTALL_PREFIX=/usr \
-DLIBCXX_ABI_UNSTABLE=OFF \
-DLLVM_USE_SANITIZER=${LIBCXX_SANITIZER} \
-DLLVM_BUILD_32_BITS=${BUILD_32_BITS} \
-DLIBCXXABI_USE_LLVM_UNWINDER=OFF \
-DLLVM_INCLUDE_TESTS=OFF \
-DLIBCXX_INCLUDE_TESTS=OFF \
-DLIBCXX_INCLUDE_BENCHMARKS=OFF \
-DLLVM_ENABLE_RUNTIMES='libcxx;libcxxabi' \
../llvm-project/runtimes/
cmake --build . -- cxx cxxabi
cd ..
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