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#!/usr/bin/env sh
#
# Install musl and musl-sanitized linux kernel headers
# to musl-{$1} directory
set -ex
MUSL_VERSION=1.1.22
MUSL="musl-${MUSL_VERSION}"
# Download, configure, build, and install musl:
curl --retry 5 https://www.musl-libc.org/releases/${MUSL}.tar.gz | tar xzf -
cd $MUSL
case ${1} in
aarch64)
musl_arch=aarch64
kernel_arch=arm64
CC=aarch64-linux-gnu-gcc \
./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
make install -j4
;;
arm)
musl_arch=arm
kernel_arch=arm
CC=arm-linux-gnueabihf-gcc CFLAGS="-march=armv6 -marm -mfpu=vfp" \
./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
make install -j4
;;
i686)
# cross-compile musl for i686 using the system compiler on an x86_64
# system.
musl_arch=i686
kernel_arch=i386
# Specifically pass -m32 in CFLAGS and override CC when running
# ./configure, since otherwise the script will fail to find a compiler.
CC=gcc CFLAGS="-m32" \
./configure --prefix="/musl-${musl_arch}" --disable-shared --target=i686
# unset CROSS_COMPILE when running make; otherwise the makefile will
# call the non-existent binary 'i686-ar'.
make CROSS_COMPILE= install -j4
;;
x86_64)
musl_arch=x86_64
kernel_arch=x86_64
./configure --prefix="/musl-${musl_arch}"
make install -j4
;;
*)
echo "Unknown target arch: \"${1}\""
exit 1
;;
esac
# shellcheck disable=SC2103
cd ..
rm -rf $MUSL
# Download, configure, build, and install musl-sanitized kernel headers:
KERNEL_HEADER_VER="4.4.2-2"
curl --retry 5 -L \
"https://github.com/sabotage-linux/kernel-headers/archive/v${KERNEL_HEADER_VER}.tar.gz" | \
tar xzf -
(
cd kernel-headers-${KERNEL_HEADER_VER}
make ARCH="${kernel_arch}" prefix="/musl-${musl_arch}" install -j4
)
rm -rf kernel-headers-${KERNEL_HEADER_VER}
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