#!/bin/busybox sh
#
# Copyright (c) 2019 David Demelier <markand@malikania.fr>
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#

PKGNAME=kmod
PKGVERSION=26
PKGREVISION=1
PKGLICENSE="GPLv2"
PKGSUMMARY="Linux kernel module utilities"
PKGDOWNLOAD="https://www.kernel.org/pub/linux/utils/kernel/$PKGNAME/$PKGNAME-$PKGVERSION.tar.xz"
PKGDEPENDS="zlib"
PKGOPTIONS="XZ ZLIB"

: ${CHOST:=$(uname -m)-linux-musl}
: ${CBUILD:=$(uname -m)-linux-musl}
: ${CC:=clang}
: ${CFLAGS:=-O2}
: ${LDFLAGS:=}
: ${LIBS:=}
: ${XZ:=yes}
: ${ZLIB:=yes}

if [ "$XZ" = "yes" ]; then
	PKGDEPENDS="xz $PKGDEPENDS"
	with_xz="--with-xz"
else
	with_xz="--without-xz"
fi

if [ "$ZLIB" = "yes" ]; then
	PKGDEPENDS="zlib $PKGDEPENDS"
	with_zlib="--with-zlib"
else
	with_zlib="--without-zlib"
fi

build()
{
	rm -rf $PKGNAME-$PKGVERSION
	tar xvf $PKGNAME-$PKGVERSION.tar.xz
	cd $PKGNAME-$PKGVERSION

	CC="$CC" \
	CFLAGS="$CFLAGS" \
	LDFLAGS="$LDFLAGS" \
	LIBS="$LIBS" \
	./configure \
		--build=$CBUILD \
		--host=$CHOST \
		--prefix= \
		$with_xz \
		$with_zlib
	make
	make install DESTDIR=$DESTDIR
	find $DESTDIR -type f -name "*.la" -delete

	# compatibility symlinks like lsmod, rmmod are installed as well.
	for tool in lsmod insmod rmmod depmod modinfo modprove; do
		ln -sf kmod $DESTDIR/bin/$tool
	done

	cd ..
	rm -rf $PKGNAME-$PKGVERSION
}