build-toolchain.sh

#!/usr/bin/env bash

set -eo pipefail

# Function to show an informational message
function msg() {
    echo -e "\e[1;32m$@\e[0m"
}

# Don't touch repo if running on CI
[ -z "$GH_RUN_ID" ] && repo_flag="--shallow-clone" || repo_flag="--no-update"

# Build LLVM
msg "Building LLVM..."
./build-llvm.py \
	--clang-vendor "Proton" \
	--targets "ARM;AArch64;X86" \
	"$repo_flag" \
	--pgo kernel-defconfig \
	--lto full

# Build binutils
msg "Building binutils..."
./build-binutils.py --targets arm aarch64 x86_64

# Remove unused products
msg "Removing unused products..."
rm -fr install/include
rm -f install/lib/*.a install/lib/*.la

# Strip remaining products
msg "Stripping remaining products..."
for f in $(find install -type f -exec file {} \; | grep 'not stripped' | awk '{print $1}'); do
	strip ${f: : -1}
done

# Set executable rpaths so setting LD_LIBRARY_PATH isn't necessary
msg "Setting library load paths for portability..."
for bin in $(find install -mindepth 2 -maxdepth 3 -type f -exec file {} \; | grep 'ELF .* interpreter' | awk '{print $1}'); do
	# Remove last character from file output (':')
	bin="${bin: : -1}"

	echo "$bin"
	patchelf --set-rpath '$ORIGIN/../lib' "$bin"
done