build.sh

#!/usr/bin/env bash

set -eux

BUSTER_LLVM_ENABLE_ASSERTIONS_STRING=""

DEFAULT_ASSERTION_FLAG=""
case $BUSTER_OS in
    Debug) DEFAULT_ASSERTION_FLAG="ON";;
    *) DEFAULT_ASSERTION_FLAG="OFF";;
esac

BASENAME_ASSERTION=""

if [[ -n "${BUSTER_LLVM_ENABLE_ASSERTIONS:-}" ]]; then
    if [[ "$BUSTER_LLVM_ENABLE_ASSERTIONS" == "ON" ]]; then
        if [[ "${CMAKE_BUILD_TYPE}" != "Debug" ]]; then
            BASENAME_ASSERTION="-assertions"
        fi
    fi
else
    BUSTER_LLVM_ENABLE_ASSERTIONS=$DEFAULT_ASSERTION_FLAG
fi

BUSTER_WINDOWS_WORKAROUND=""
if [[ "$BUSTER_OS" == "windows" ]]; then
    if [[ $CMAKE_BUILD_TYPE == "Release" ]]; then
        if [[ -n "${BUSTER_LLVM_ENABLE_ASSERTIONS:-}" ]]; then
            if [[ "$BUSTER_LLVM_ENABLE_ASSERTIONS" == "ON" ]]; then
                BUSTER_WINDOWS_WORKAROUND="-DCMAKE_C_FLAGS=-U_DEBUG -DCMAKE_CXX_FLAGS=-U_DEBUG"
            fi
        fi
    fi
fi

BUSTER_LLVM_ENABLE_ASSERTIONS_STRING="-DLLVM_ENABLE_ASSERTIONS=$BUSTER_LLVM_ENABLE_ASSERTIONS"

ROOT_DIR=$(pwd)
source basename.sh
INSTALL_DIRECTORY_PATH=$ROOT_DIR/install/$LLVM_BASENAME

ZSTD_BUILD_DIR=$ROOT_DIR/build/zstd-$LLVM_BASENAME
mkdir -p $ZSTD_BUILD_DIR
cd $ZSTD_BUILD_DIR
cmake $ROOT_DIR/zstd \
    -G Ninja \
    -DCMAKE_C_COMPILER=clang \
    -DCMAKE_CXX_COMPILER=clang++ \
    -DCMAKE_ASM_COMPILER=clang \
    -DCMAKE_POSITION_INDEPENDENT_CODE=OFF \
    -DCMAKE_INSTALL_PREFIX="$INSTALL_DIRECTORY_PATH" \
    -DCMAKE_BUILD_TYPE=$CMAKE_BUILD_TYPE \
    -DCMAKE_LINKER_TYPE=LLD
cmake --build . --target install
cd $ROOT_DIR

ZLIB_BUILD_DIR=$ROOT_DIR/build/zlib-$LLVM_BASENAME
mkdir -p $ZLIB_BUILD_DIR
cd $ZLIB_BUILD_DIR
cmake $ROOT_DIR/zlib \
    -G Ninja \
    -DCMAKE_C_COMPILER=clang \
    -DCMAKE_CXX_COMPILER=clang++ \
    -DCMAKE_ASM_COMPILER=clang \
    -DCMAKE_POSITION_INDEPENDENT_CODE=OFF \
    -DCMAKE_INSTALL_PREFIX="$INSTALL_DIRECTORY_PATH" \
    -DCMAKE_BUILD_TYPE=$CMAKE_BUILD_TYPE \
    -DCMAKE_LINKER_TYPE=LLD
cmake --build . --target install
cd $ROOT_DIR

case $BUSTER_OS in
    windows) BUSTER_OPTIONAL_TRIPLE_ARG="-DLLVM_HOST_TRIPLE=$BUSTER_ARCH-pc-windows-msvc";;
    *) BUSTER_OPTIONAL_TRIPLE_ARG="";;
esac

if [[ "$BUSTER_ENABLE_CLANG" == "true" && "$BUSTER_OS" == "windows" && "$BUSTER_LLVM_ENABLE_ASSERTIONS" == "ON" ]]; then
    BUSTER_ENABLE_CLANG="false"
fi

if [[ "$BUSTER_ENABLE_CLANG" == "true" ]]; then
    BUSTER_CMAKE_CLANG_ARGS="-DLLVM_ENABLE_RUNTIMES=compiler-rt -DCOMPILER_RT_BUILD_SANITIZERS=ON -DCOMPILER_RT_BUILD_LIBFUZZER=ON -DCLANG_BUILD_TOOLS=OFF -DCLANG_BUILD_EXAMPLES=OFF -DCLANG_INCLUDE_DOCS=OFF -DCLANG_INCLUDE_TESTS=OFF -DCLANG_TOOL_CLANG_IMPORT_TEST_BUILD=OFF -DCLANG_TOOL_CLANG_LINKER_WRAPPER_BUILD=OFF -DCLANG_TOOL_C_INDEX_TEST_BUILD=OFF -DCLANG_TOOL_LIBCLANG_BUILD=OFF -DCLANG_ENABLE_OBJC_REWRITER=ON -DCLANG_ENABLE_STATIC_ANALYZER=ON"
    BUSTER_LLVM_ENABLE_PROJECTS_FLAG="-DLLVM_ENABLE_PROJECTS=lld;clang"
    BUSTER_CMAKE_TARGETS="llvm-config llvm-tblgen clang-tblgen clang"
else
    BUSTER_CMAKE_CLANG_ARGS=
    BUSTER_LLVM_ENABLE_PROJECTS_FLAG=-DLLVM_ENABLE_PROJECTS="lld"
    BUSTER_CMAKE_TARGETS="llvm-config llvm-tblgen"
fi

LLVM_BUILD_DIR=$ROOT_DIR/build/$LLVM_BASENAME
mkdir -p $LLVM_BUILD_DIR

LLVM_SOURCE_DIR="$ROOT_DIR/source/$LLVM_SOURCE_BASENAME"
if [ ! -d "$LLVM_SOURCE_DIR" ]; then
    git clone --depth 1 --single-branch --branch llvmorg-$LLVM_VERSION https://github.com/llvm/llvm-project.git $LLVM_SOURCE_DIR
    cd $LLVM_SOURCE_DIR
    #git apply $ROOT_DIR/patches/disable_clang_tools.patch
    cd $ROOT_DIR
fi

cd $LLVM_BUILD_DIR
cmake $LLVM_SOURCE_DIR/llvm \
    -G Ninja \
    -DCMAKE_INSTALL_PREFIX="$INSTALL_DIRECTORY_PATH" \
    -DCMAKE_PREFIX_PATH="$INSTALL_DIRECTORY_PATH" \
    -DCMAKE_BUILD_TYPE=$CMAKE_BUILD_TYPE \
    -DCMAKE_C_COMPILER=clang \
    -DCMAKE_CXX_COMPILER=clang++ \
    -DCMAKE_ASM_COMPILER=clang \
    -DCMAKE_LINKER_TYPE=LLD \
    -DLLVM_ENABLE_PIC=OFF \
    $BUSTER_OPTIONAL_TRIPLE_ARG \
    $BUSTER_LLVM_ENABLE_PROJECTS_FLAG \
    $BUSTER_LLVM_ENABLE_ASSERTIONS_STRING \
    $BUSTER_WINDOWS_WORKAROUND \
    -DBUILD_SHARED_LIBS=OFF \
    -DLLVM_TARGETS_TO_BUILD="X86;AArch64" \
    -DLLVM_PARALLEL_LINK_JOBS=1 \
    -DLLVM_BUILD_LLVM_DYLIB=OFF \
    -DLLVM_LINK_LLVM_DYLIB=OFF \
    -DLLVM_OPTIMIZED_TABLEGEN=ON \
    -DLLVM_ENABLE_BINDINGS=OFF \
    -DLLVM_ENABLE_LIBEDIT=OFF \
    -DLLVM_ENABLE_LIBPFM=OFF \
    -DLLVM_ENABLE_LIBXML2=OFF \
    -DLLVM_ENABLE_OCAMLDOC=OFF \
    -DLLVM_ENABLE_PLUGINS=OFF \
    -DLLVM_ENABLE_Z3_SOLVER=OFF \
    -DLLVM_ENABLE_ZSTD=OFF \
    -DLLVM_BUILD_UTILS=OFF \
    -DLLVM_BUILD_TOOLS=OFF \
    -DLLVM_BUILD_EXAMPLES=OFF \
    -DLLVM_INCLUDE_TOOLS=ON \
    -DLLVM_INCLUDE_UTILS=OFF \
    -DLLVM_INCLUDE_TESTS=OFF \
    -DLLVM_INCLUDE_EXAMPLES=OFF \
    -DLLVM_INCLUDE_BENCHMARKS=OFF \
    -DLLVM_INCLUDE_DOCS=OFF \
    -DLLVM_TOOL_LLVM_LTO2_BUILD=OFF \
    -DLLVM_TOOL_LLVM_LTO_BUILD=OFF \
    -DLLVM_TOOL_LTO_BUILD=OFF \
    -DLLVM_TOOL_REMARKS_SHLIB_BUILD=OFF \
    -DLLD_BUILD_TOOLS=ON \
    $BUSTER_CMAKE_CLANG_ARGS

cmake --build . --target $BUSTER_CMAKE_TARGETS install
cd $ROOT_DIR

case "$BUSTER_OS" in
    windows) EXE_EXTENSION=".exe";;
    *) EXE_EXTENSION="";;
esac

if [[ "$BUSTER_OS" == "macos" ]]; then
    PATH=$BUSTER_LLD_PREFIX:$PATH
fi

# Install manually just these couple exes
mkdir -p $INSTALL_DIRECTORY_PATH/bin
cp $LLVM_BUILD_DIR/bin/llvm-config$EXE_EXTENSION $INSTALL_DIRECTORY_PATH/bin
cp $LLVM_BUILD_DIR/bin/llvm-tblgen$EXE_EXTENSION $INSTALL_DIRECTORY_PATH/bin
if [[ "$BUSTER_ENABLE_CLANG" == "true" ]]; then
    cp $LLVM_BUILD_DIR/bin/clang$EXE_EXTENSION $INSTALL_DIRECTORY_PATH/bin
    if [[ "$BUSTER_OS" == "windows" ]]; then
        cp $LLVM_BUILD_DIR/bin/clang$EXE_EXTENSION $INSTALL_DIRECTORY_PATH/bin/clang++$EXE_EXTENSION
    fi
    cp $LLVM_BUILD_DIR/bin/clang-tblgen$EXE_EXTENSION $INSTALL_DIRECTORY_PATH/bin
fi
rm $INSTALL_DIRECTORY_PATH/bin/amdgpu-arch$EXE_EXTENSION || true
rm $INSTALL_DIRECTORY_PATH/bin/nvptx-arch$EXE_EXTENSION || true

LLVM_BINDINGS_SOURCE_DIR=$ROOT_DIR/bindings
LLVM_BINDINGS_BUILD_DIR=$ROOT_DIR/build/bindings-$LLVM_BASENAME
mkdir -p $LLVM_BINDINGS_BUILD_DIR
cd $LLVM_BINDINGS_BUILD_DIR

cmake $LLVM_BINDINGS_SOURCE_DIR \
    -G Ninja \
    -DCMAKE_INSTALL_PREFIX="$INSTALL_DIRECTORY_PATH" \
    -DCMAKE_PREFIX_PATH="$INSTALL_DIRECTORY_PATH" \
    -DCMAKE_BUILD_TYPE=$CMAKE_BUILD_TYPE \
    -DCMAKE_POSITION_INDEPENDENT_CODE=OFF \
    -DCMAKE_C_COMPILER=clang \
    -DCMAKE_CXX_COMPILER=clang++ \
    -DCMAKE_ASM_COMPILER=clang \
    -DCMAKE_LINKER_TYPE=LLD

cmake --build .

if [[ "$BUSTER_OS" == "windows" ]]; then
    cp $LLVM_BINDINGS_BUILD_DIR/lld_bindings.lib $INSTALL_DIRECTORY_PATH/lib
else
    cp $LLVM_BINDINGS_BUILD_DIR/liblld_bindings.a $INSTALL_DIRECTORY_PATH/lib
fi
cp $ROOT_DIR/bindings/include/* $INSTALL_DIRECTORY_PATH/include

cd $ROOT_DIR

7z a -t7z -m0=lzma2 -mx=9 -mfb=64 -md=64m -ms=on $LLVM_BASENAME.7z $INSTALL_DIRECTORY_PATH
b2sum $LLVM_BASENAME.7z > "$LLVM_BASENAME.7z.b2sum"
cat "$LLVM_BASENAME.7z.b2sum"
LLVM_ASSET_BASE_PATH="$(pwd)/$LLVM_BASENAME"
case "$BUSTER_OS" in
    windows) LLVM_ASSET_BASE_PATH="$(cygpath -w ${LLVM_ASSET_BASE_PATH})" ;;
    *) ;;
esac

if [[ "$GITHUB_ACTIONS" == "true" ]]; then
    echo "LLVM_ASSET_BASE_PATH=$LLVM_ASSET_BASE_PATH" >> $GITHUB_ENV
    echo "LLVM_BASENAME=$LLVM_BASENAME" >> $GITHUB_ENV
fi