kpatch/kpatch-build/kpatch-gcc

#!/bin/bash

set -x

TOOLCHAINCMD="$1"
shift

if [[ "$TOOLCHAINCMD" != "gcc" ]] || [[ -z "$TEMPDIR" ]]; then
    exec "$TOOLCHAINCMD" "$@"
fi

declare -a args=($@)

while [ "$#" -gt 0 ]; do
	if [ "$1" = "-o" ]; then
		obj=$2
		[[ $2 = */.tmp_*.o ]] && obj=${2/.tmp_/}
		case "$obj" in
			*.mod.o|\
			*built-in.o|\
			vmlinux.o|\
			.tmp_kallsyms1.o|\
			.tmp_kallsyms2.o|\
			init/version.o|\
			arch/x86/boot/version.o|\
			arch/x86/boot/compressed/eboot.o|\
			arch/x86/boot/header.o|\
			arch/x86/boot/compressed/efi_stub_64.o|\
			arch/x86/boot/compressed/piggy.o|\
			kernel/system_certificates.o|\
			.*.o)
			break
			;;
		*.o)
			mkdir -p "$TEMPDIR/orig/$(dirname $obj)"
			cp -f "$obj" "$TEMPDIR/orig/$obj"
			echo "$obj" >> "$TEMPDIR/changed_objs"
			break
			;;
		*)
			break
			;;
		esac
	fi
	shift
done

exec "$TOOLCHAINCMD" "${args[@]}"