Install clang-10

build-clang.sh

#!/usr/bin/env bash

set -ex

MY_PREFIX="${DEFAULT_PREFIX:-${HOME}/.local}"

LLVM_TAG=llvmorg-10.0.1

mkdir llvm-project && cd $_
curl -L "https://github.com/llvm/llvm-project/archive/${LLVM_TAG}.tar.gz" \
| tar xzf - --strip-components=1
mkdir build-clang && cd $_

cmake ../llvm \
  -G Ninja \
  -DCMAKE_BUILD_TYPE=Release \
  -DCMAKE_C_COMPILER=/usr/bin/gcc \
  -DCMAKE_CXX_COMPILER=/usr/bin/g++ \
  -DCMAKE_INSTALL_PREFIX="${MY_PREFIX}" \
  -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON \
  -DLLVM_INSTALL_UTILS=ON \
  -DLLVM_ENABLE_FFI=ON \
  -DLLVM_ENABLE_RTTI=ON \
  -DLLVM_TARGETS_TO_BUILD=X86 \
  -DLLVM_HOST_TRIPLE=x86_64-unknown-linux-gnu \
  -DLLVM_DEFAULT_TARGET_TRIPLE=x86_64-unknown-linux-gnu \
  -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;lld" \
  -DLLVM_CCACHE_BUILD=true\

ninja
ninja install

Useful links:

• https://github.com/rust-lang/rust/blob/master/src/ci/docker/dist-x86_64-linux/build-clang.sh
• http://www.linuxfromscratch.org/blfs/view/svn/general/llvm.html
• http://llvm.org/docs/GettingStarted.html#checkout
• https://llvm.org/docs/CMake.html

For compiler-rt build, see https://git.archlinux.org/svntogit/packages.git/tree/trunk/PKGBUILD?h=packages/compiler-rt