build_stage2-prof-use-lto.bash

#!/bin/bash
TOPLEV=~/toolchain/llvm
cd ${TOPLEV}

echo "Building Clang with PGO and LTO"

mkdir ${TOPLEV}/stage2-prof-use-lto
cd ${TOPLEV}/stage2-prof-use-lto
CPATH=${TOPLEV}/llvm-bolt/bin

echo "== Configure Build"
echo "== Build with stage1-tools -- $CPATH"

cmake -G Ninja ${TOPLEV}/llvm-project/llvm \
    -DLLVM_BINUTILS_INCDIR=/usr/include \
    -DCLANG_ENABLE_ARCMT=OFF \
    -DCLANG_ENABLE_STATIC_ANALYZER=OFF \
    -DCLANG_PLUGIN_SUPPORT=OFF \
    -DLLVM_ENABLE_BINDINGS=OFF  \
    -DLLVM_ENABLE_OCAMLDOC=OFF \
    -DLLVM_INCLUDE_DOCS=OFF \
    -DLLVM_INCLUDE_EXAMPLES=OFF \
    -DCMAKE_C_COMPILER=${CPATH}/clang \
    -DCMAKE_CXX_COMPILER=${CPATH}/clang++ \
    -DLLVM_USE_LINKER=${CPATH}/ld.lld \
    -DLLVM_ENABLE_PROJECTS="clang;lld;compiler-rt;polly" \
    -DLLVM_TARGETS_TO_BUILD="X86" \
    -DCMAKE_BUILD_TYPE=Release \
    -DCLANG_VENDOR="CachyOS - LLVM 17 BOLT" \
    -DLLVM_ENABLE_WARNINGS=OFF \
    -DCMAKE_INSTALL_PREFIX=${TOPLEV}/stage2-prof-use-lto/install \
    -DLLVM_PROFDATA_FILE=${TOPLEV}/stage2-prof-gen/profiles/clang.profdata \
    -DLLVM_ENABLE_LTO=Thin \
    -DCMAKE_C_FLAGS="-O3 -march=x86-64-v3 -mtune=haswell -ffunction-sections -fdata-sections" \
    -DCMAKE_ASM_FLAGS="-O3 -march=x86-64-v3 -mtune=haswell -ffunction-sections -fdata-sections" \
    -DCMAKE_CXX_FLAGS="-O3 -march=x86-64-v3 -mtune=haswell -ffunction-sections -fdata-sections" \
    -DCMAKE_EXE_LINKER_FLAGS="-Wl,-znow -Wl,--emit-relocs" \
    -DLLVM_ENABLE_PLUGINS=ON \
    -DLLVM_ENABLE_TERMINFO=OFF  || (echo "Could not configure project!"; exit 1)

echo "== Start Build"
ninja install || (echo "Could not build project!"; exit 1)