# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/dev-libs/klibc/klibc-1.2.1-r2.ebuild,v 1.7 2007/07/02 14:54:32 peper Exp $

inherit eutils linux-info multilib

# klibc has no PT_GNU_STACK support, so scanning for execstacks is moot
QA_EXECSTACK="*"

export CTARGET=${CTARGET:-${CHOST}}
if [[ ${CTARGET} == ${CHOST} ]] ; then
	if [[ ${CATEGORY/cross-} != ${CATEGORY} ]] ; then
		export CTARGET=${CATEGORY/cross-}
	fi
fi

DESCRIPTION="A minimal libc subset for use with initramfs."
HOMEPAGE="http://www.zytor.com/mailman/listinfo/klibc"
SRC_URI="ftp://ftp.kernel.org/pub/linux/libs/klibc/${P}.tar.bz2
	ftp://ftp.kernel.org/pub/linux/libs/klibc/Stable/${P}.tar.bz2
	ftp://ftp.kernel.org/pub/linux/libs/klibc/Testing/${P}.tar.bz2"
LICENSE="|| ( GPL-2 LGPL-2 )"
# Mips patches needs updating ...
KEYWORDS="amd64 -mips ppc x86"
IUSE="n32"
RESTRICT="strip"

DEPEND="dev-lang/perl
	virtual/linux-sources"
RDEPEND="dev-lang/perl"

if [[ ${CTARGET} != ${CHOST} ]] ; then
	SLOT="${CTARGET}"
else
	SLOT="0"
fi

is_cross() { [[ ${CHOST} != ${CTARGET} ]] ; }

guess_arch() {
	local x
	local host=$(echo "${CTARGET%%-*}" | sed -e 's/i.86/i386/' \
	                                         -e 's/sun4u/sparc64/' \
	                                         -e 's/arm.*/arm/' \
	                                         -e 's/sa110/arm/' \
	                                         -e 's/powerpc/ppc/')

	# Sort reverse so that we will get ppc64 before ppc, etc
	for x in $(ls -1 "${S}/include/arch/" | sort -r) ; do
		if [[ ${host} == "${x}" ]] ; then
			echo "${x}"
			return 0
		fi
	done

	return 1
}

pkg_setup() {
	# Make sure kernel sources are OK
	# (Override for linux-mod eclass)
	check_kernel_built
}

src_unpack() {
	unpack ${A}

	if [[ ! -d /usr/${CTARGET} ]] ; then
		echo
		eerror "It does not look like your cross-compiler is setup properly!"
		die "It does not look like your cross-compiler is setup properly!"
	fi

	if ! guess_arch &>/dev/null ; then
		echo
		eerror "Could not guess klibc's ARCH from your CTARGET!"
		die "Could not guess klibc's ARCH from your CTARGET!"
	fi

	kernel_arch=$(readlink "${KV_OUT_DIR}/include/asm" | sed -e 's:asm-::' | \
	              sed -e 's/powerpc/ppc/')
	if [[ ${kernel_arch} != $(guess_arch) ]] ; then
		echo
		eerror "Your kernel sources are not configured for your chosen arch!"
		eerror "(KERNEL_ARCH=\"${kernel_arch}\", ARCH=\"$(guess_arch)\")"
		die "Your kernel sources are not configured for your chosen arch!"
	fi

	cd "${S}"

	# Add our linux source tree symlink
	ln -snf ${KV_DIR} linux

	# We do not want all the nice prelink warnings
	# NOTE: for amd64, we might change below to '/usr/$(get_libdir)/klibc',
	#       but I do not do it right now, as the build system do not support
	#       the lib64 yet ....
	cat > "${S}/70klibc" <<-EOF
		PRELINK_PATH_MASK="/usr/lib/klibc"
	EOF

	# Export the NOSTDINC_FLAGS to ensure -nostdlib is passed, bug #120678
	epatch "${FILESDIR}"/${P}-nostdinc-flags.patch

	# Fix building when KBUILD_OUTPUT is set, bug #122173.
	epatch "${FILESDIR}"/${PN}-1.2.4-kbuild.patch

	# Fix a nasty typedef error in the sources, appearing on >= linux-2.6.19
	# (see #165472).
	epatch "${FILESDIR}"/${PN}-1.4.13-types.h.patch

	# klibc detects mips64 systems as having 64bit userland
	# Force them to 32bit userlands instead
#	if ! use n32; then
#		epatch "${FILESDIR}"/${PN}-1.1.16-mips32.patch
#	fi

	# Linker path is awry
#	epatch "${FILESDIR}"/${PN}-1.1.16-mips-ldpaths.patch
}

src_compile() {
	local myargs

	[[ ${KV_DIR} != "${KV_OUT_DIR}" ]] && \
		myargs="KLIBCKERNELOBJ='${KV_OUT_DIR}/' KBUILD_SRC='1'"

	if is_cross ; then
		einfo "ARCH = \"$(guess_arch)\""
		einfo "CROSS = \"${CTARGET}-\""
		emake ARCH=$(guess_arch) \
			CROSS="${CTARGET}-" \
			libdir="/usr/$(get_libdir)" \
			SHLIBDIR="/$(get_libdir)" \
			mandir="/usr/share/man" \
			INSTALLDIR="/usr/$(get_libdir)/klibc" \
			${myargs} || die "Compile failed!"
	else
		env -u ARCH \
		emake \
			libdir="/usr/$(get_libdir)" \
			SHLIBDIR="/$(get_libdir)" \
			mandir="/usr/share/man" \
			INSTALLDIR="/usr/$(get_libdir)/klibc" \
			${myargs} || die "Compile failed!"
	fi
}

src_install() {
	local myargs klibc_prefix

	[[ ${KV_DIR} != "${KV_OUT_DIR}" ]] && \
		myargs="KLIBCKERNELOBJ='${KV_OUT_DIR}/' KBUILD_SRC='1'"

	if is_cross ; then
		klibc_prefix=$("${S}/klcc/${CTARGET}-klcc" -print-klibc-prefix)

		make INSTALLROOT="${D}" \
			ARCH=$(guess_arch) \
			CROSS="${CTARGET}-" \
			libdir="/usr/$(get_libdir)" \
			SHLIBDIR="/$(get_libdir)" \
			mandir="/usr/share/man" \
			INSTALLDIR="/usr/$(get_libdir)/klibc" \
			${myargs} \
			install || die "Install failed!"
	else
		klibc_prefix=$("${S}/klcc/klcc" -print-klibc-prefix)

		env -u ARCH \
		make INSTALLROOT="${D}" \
			libdir="/usr/$(get_libdir)" \
			SHLIBDIR="/$(get_libdir)" \
			mandir="/usr/share/man" \
			INSTALLDIR="/usr/$(get_libdir)/klibc" \
			${myargs} \
			install || die "Install failed!"
	fi

	# Hardlinks becoming copies
	for x in gunzip zcat ; do
		rm -f "${D}/${klibc_prefix}/bin/${x}"
		dosym gzip "${klibc_prefix}/bin/${x}"
	done

	if ! is_cross ; then
		insinto /usr/share/aclocal
		doins "${FILESDIR}"/klibc.m4

		doenvd "${S}"/70klibc

		dodoc "${S}"/README "${S}"/klibc/{LICENSE,CAVEATS}
		newdoc "${S}"/klibc/README README.klibc
		newdoc "${S}"/klibc/arch/README README.klibc.arch
		docinto dash; newdoc "${S}"/dash/README.klibc README
		docinto gzip; dodoc "${S}"/gzip/{COPYING,README}
	fi
}

pkg_postinst() {
	# Override for linux-mod eclass
	return 0
}