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Showing content from https://github.com/google/llvm-propeller below:

google/llvm-propeller: PROPELLER: Profile Guided Optimizing Large Scale LLVM-based Relinker

Propeller is a profile-guided, relinking optimizer for warehouse-scale applications. It is built on top of LLVM and provides a framework for computing whole-program optimizations for applications built with LLVM.

For artifact evaluation, see ArtifactEvaluation/README.md

While the Propeller build system automatically pulls in most of its dependencies, you will need to install a few packages manually:

# Common dependencies
sudo apt install -y wget lsb-release software-properties-common gnupg

# Propeller builds with Clang 19.0.0 or newer.
wget https://apt.llvm.org/llvm.sh
chmod +x llvm.sh
sudo ./llvm.sh 19
export CC=clang-19
export CXX=clang++-19

# For the CMake build
sudo apt-get update && sudo apt-get install -y \
    libelf-dev \
    libssl-dev \
    libzstd-dev

The Propeller repository provides both CMake and Bazel build configurations. The CMake build requires CMake 3.24 or newer, and the Bazel build requires Bazel 5.0 or newer.

cmake -G Ninja -B build
ninja -C build generate_propeller_profiles

# Build and run tests (optional)
ninja -C build
ninja -C build test

bazel build //propeller:generate_propeller_profiles

# Build and run tests (optional)
bazel test //propeller/...:all

./generate_propeller_profiles \
    --binary=/path/to/profiled/binary \
    --profile=/path/to/input/profile.txt \
    --cc_profile=/path/to/out/cc_profile.txt \
    --ld_profile=/path/to/out/ld_profile.txt

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