musllvm/scripts/headers.sh

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#!/bin/sh
set -eu
ARCH=$(uname -m)
FROOT="$ARCH-musllvm"
LINUX_TAR=$(ls ./sources/linux-*.tar.* 2>/dev/null | head -n 1 | xargs basename)
if [ -z "$LINUX_TAR" ]; then
echo "ERR: No Linux tarball found in sources directory"
exit 1
fi
LINUX_SOURCE="${LINUX_TAR%%.tar*}"
if command -v "clang" >/dev/null 2>&1 && command -v "lld" >/dev/null 2>&1; then
export LLVM=1
export LLVM_IAS=1
fi
if [ -z ./build/"$LINUX_SOURCE" ]; then
echo "Extracting Linux tarball to ./build/"
tar -xpf ./sources/"$LINUX_TAR" -C ./build
else
echo "Linux source already extracted."
fi
echo "Creating target include directory"
mkdir -pv ./build/"$FROOT"/include
echo "Building Headers"
if [ -d ./build/"$FROOT"/include/linux ]; then
echo "Headers already built, skipping..."
exit
fi
cd ./build/"$LINUX_SOURCE"
make mrproper
make headers
find usr/include -type f ! -name '*.h' -delete
cp -rv usr/include/* ../"$FROOT"/include/
rm -v ../"$FROOT"/include/Makefile
exit