repo/core/busybox/build
2021-09-15 08:08:03 +03:00

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#!/bin/sh -e
for patch in patch/*.patch; do
patch -p1 < "$patch"
done
# Remove forced gcc/g++ usage so builds work on gcc-less systems.
sed -e "s#= g[c+][c+]#= $CC#g" \
-e "s#\(\$(CROSS_COMPILE)\)gcc#\1$CC#g" Makefile > _
mv -f _ Makefile
case $("$CC" --version) in *clang*)
# Disable UB based optimizations which are optimized out by
# clang and become null pointer dereferences(?).
patch -p1 < patch-clang/fix-UB.patch
# Ensure that busybox's build system is aware that 'cc' may point
# to clang rather than GCC. This is the case in non-GCC systems.
sed "s&\(\$(CC),\)clang&\1$CC&g" Makefile.flags > _
mv -f _ Makefile.flags
esac
# Build and install regular busybox.
# This excludes utilities which require 'suid' to function.
make HOSTCC="$CC"
make CONFIG_PREFIX="$1/usr" install
# Rename the binary temporarily.
mv "$1/usr/bin/busybox" "$1/usr/bin/busybox-nosuid"
# Build and install suid busybox.
# This _only_ includes utlities which require 'suid' to function.
cp -f .config-suid .config
make HOSTCC="$CC"
make CONFIG_PREFIX="$1/usr" install
# Aptly name the busybox binaries.
mv -f "$1/usr/bin/busybox" "$1/usr/bin/busybox-suid"
mv -f "$1/usr/bin/busybox-nosuid" "$1/usr/bin/busybox"
# Install the non-suid symlinks.
"$1/usr/bin/busybox" --list | while read -r bin; do
ln -s busybox "$1/usr/bin/$bin"
done
# Install the suid symlinks.
"$1/usr/bin/busybox-suid" --list | while read -r bin; do
ln -s busybox-suid "$1/usr/bin/$bin"
done
# Set suid on busybox suid.
chmod u+s "$1/usr/bin/busybox-suid"
# The acpid command requires that this directory exist
# and does not automatically create it..
mkdir -p "$1/etc/acpi"
# Install runit services.
for s in acpid crond syslogd mdev ntpd; do
mkdir -p "$1/etc/sv/$s"
cp -f "$s.run" "$1/etc/sv/$s/run"
ln -sf "/run/runit/supervise.$s" "$1/etc/sv/$s/supervise"
done
cp -f mdev.conf "$1/etc/mdev.conf"