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#!/usr/bin/env bash
set -ex
source shared.sh
LLVM=llvmorg-15.0.0
mkdir llvm-project
cd llvm-project
curl -L https://github.com/llvm/llvm-project/archive/$LLVM.tar.gz | \
tar xzf - --strip-components=1
mkdir clang-build
cd clang-build
# For whatever reason the default set of include paths for clang is different
# than that of gcc. As a result we need to manually include our sysroot's
# include path, /rustroot/include, to clang's default include path.
INC="/rustroot/include:/usr/include"
# We need compiler-rt for the profile runtime (used later to PGO the LLVM build)
# but sanitizers aren't currently building. Since we don't need those, just
# disable them. BOLT is used for optimizing LLVM.
hide_output \
cmake ../llvm \
-DCMAKE_C_COMPILER=/rustroot/bin/gcc \
-DCMAKE_CXX_COMPILER=/rustroot/bin/g++ \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_INSTALL_PREFIX=/rustroot \
-DCOMPILER_RT_BUILD_SANITIZERS=OFF \
-DCOMPILER_RT_BUILD_XRAY=OFF \
-DCOMPILER_RT_BUILD_MEMPROF=OFF \
-DLLVM_TARGETS_TO_BUILD=X86 \
-DLLVM_INCLUDE_BENCHMARKS=OFF \
-DLLVM_INCLUDE_TESTS=OFF \
-DLLVM_INCLUDE_EXAMPLES=OFF \
-DLLVM_ENABLE_PROJECTS="clang;lld;compiler-rt;bolt" \
-DC_INCLUDE_DIRS="$INC"
hide_output make -j$(nproc)
hide_output make install
cd ../..
rm -rf llvm-project
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