# Copyright 1999-2015 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-libs/uclibc/uclibc-0.9.33.2-r3.ebuild,v 1.6 2015/02/27 08:05:56 vapier Exp $

inherit eutils flag-o-matic multilib toolchain-funcs savedconfig
if [[ ${PV} == "9999" ]] ; then
	EGIT_REPO_URI="git://git.busybox.net/uClibc"
	inherit git-2
fi

export CBUILD=${CBUILD:-${CHOST}}
export CTARGET=${CTARGET:-${CHOST}}
if [[ ${CTARGET} == ${CHOST} ]] ; then
	if [[ ${CATEGORY} == cross-* ]] ; then
		export CTARGET=${CATEGORY#cross-}
	fi
fi

MY_P=uClibc-${PV}
DESCRIPTION="C library for developing embedded Linux systems"
HOMEPAGE="http://www.uclibc.org/"
if [[ ${PV} != "9999" ]] ; then
	PATCH_VER="5"
	SRC_URI="http://uclibc.org/downloads/${MY_P}.tar.bz2
		${PATCH_VER:+mirror://gentoo/${MY_P}-patches-${PATCH_VER}.tar.bz2}"
	KEYWORDS="-* amd64 arm m68k ~mips ppc sh sparc x86"
fi

LICENSE="LGPL-2"
SLOT="0"
IUSE="debug hardened iconv ipv6 nptl rpc ssp uclibc-compat wordexp crosscompile_opts_headers-only"
RESTRICT="strip"

S=${WORKDIR}/${MY_P}

is_crosscompile() {
	[[ ${CHOST} != ${CTARGET} ]]
}
alt_build_kprefix() {
	if [[ ${CBUILD} == ${CHOST} && ${CTARGET} == ${CHOST} ]] ; then
		echo /usr/include
	else
		echo /usr/${CTARGET}/usr/include
	fi
}

just_headers() {
	use crosscompile_opts_headers-only && is_crosscompile
}

uclibc_endian() {
	# XXX: this wont work for a toolchain which is bi-endian, but we
	#      dont have any such thing at the moment, so not a big deal
	touch "${T}"/endian.s
	$(tc-getAS ${CTARGET}) "${T}"/endian.s -o "${T}"/endian.o
	case $(file "${T}"/endian.o) in
		*" MSB "*) echo "BIG";;
		*" LSB "*) echo "LITTLE";;
		*)         echo "NFC";;
	esac
	rm -f "${T}"/endian.{s,o}
}

pkg_setup() {
	if [ ${CTARGET} == ${CHOST} ] ; then
		case ${CHOST} in
		*-uclinux*|*-uclibc*) ;;
		*) die "Use sys-devel/crossdev to build a uclibc toolchain" ;;
		esac
	fi
}

# XXX: We should kill these off.
CPU_ALPHA=""
CPU_AMD64=""
CPU_ARM="GENERIC_ARM ARM{610,710,7TDMI,720T,920T,922T,926T,10T,1136JF_S,1176JZ{_,F_}S,_{SA110,SA1100,XSCALE,IWMMXT},_CORTEX_{M3,M1}}"
CPU_IA64=""
CPU_M68K=""
CPU_MIPS="MIPS_ISA_{1,2,3,4,MIPS{32{,R2},64}} MIPS_{N64,O32,N32}_ABI"
CPU_PPC=""
CPU_SH="SH{2,2A,3,4,5}"
CPU_SPARC="SPARC_V{7,8,9,9B}"
CPU_X86="GENERIC_386 {3,4,5,6}86 586MMX PENTIUM{II,III,4} K{6,7} ELAN CRUSOE WINCHIP{C6,2} CYRIXIII NEHEMIAH"
IUSE_UCLIBC_CPU="${CPU_ARM} ${CPU_MIPS} ${CPU_PPC} ${CPU_SH} ${CPU_SPARC} ${CPU_X86}"

check_cpu_opts() {
	local cpu_var="CPU_$(echo $(tc-arch) | tr [a-z] [A-Z])"
	[[ -z ${!cpu_var} ]] && return 0

	if [[ -z ${UCLIBC_CPU} ]] ; then
		ewarn "You really should consider setting UCLIBC_CPU"
		ewarn "Otherwise, the build will be generic (read: slow)."
		ewarn "Available CPU options:"
		UCLIBC_CPU=$(eval echo ${!cpu_var})
		echo ${UCLIBC_CPU}
		case ${CTARGET} in
			mips[1234]*) export UCLIBC_CPU="MIPS_ISA_${CTARGET:4:1}";;
			sh[2345]*)   export UCLIBC_CPU="SH${CTARGET:2:1}";;
			i[456]86*)   export UCLIBC_CPU="${CTARGET:1:1}86";;
			*)           export UCLIBC_CPU=${UCLIBC_CPU%% *};;
		esac
	else
		local cpu found=0
		for cpu in $(eval echo ${!cpu_var}) ; do
			[[ ${UCLIBC_CPU} == "${cpu}" ]] && found=1 && break
		done
		if [[ ${found} -eq 0 ]] ; then
			ewarn "UCLIBC_CPU choice '${UCLIBC_CPU}' not supported"
			ewarn "Valid choices:"
			eval echo ${!cpu_var}
			die "pick a supported cpu type"
		fi
	fi
}

kconfig_q_opt() {
	local flag=$1; shift
	case ${flag} in
	y|n) ;;
	*) flag=$(usex ${flag} y n) ;;
	esac

	local var="defs_${flag}"
	eval "${var}+=( $* )"
}

get_opt() {
	(
	unset ${1}
	. ${2:-"${S}"/.config}
	echo ${!1}
	)
}

src_oldconfig() {
	yes "" 2>/dev/null | emake -s oldconfig >/dev/null
}
src_config() {
	restore_config .config
	if [ -f .config ]; then
		src_oldconfig
		return 0
	else
		ewarn "Could not locate user configfile, so we will save a default one"
	fi

	emake ARCH=${target} defconfig >/dev/null || die

	local defs_{y,n} defs

	defs=(
		DO{DEBUG_PT,ASSERTS}
		SUPPORT_LD_DEBUG_EARLY
		UCLIBC_HAS_PROFILING
	)
	kconfig_q_opt n "${defs[@]}"
	kconfig_q_opt debug DODEBUG SUPPORT_LD_DEBUG

	sed -i -e '/ARCH_.*_ENDIAN/d' .config
	kconfig_q_opt y "ARCH_WANTS_$(uclibc_endian)_ENDIAN"

	if [[ ${CTARGET} == arm* ]] ; then
		kconfig_q_opt n CONFIG_ARM_OABI
		kconfig_q_opt y CONFIG_ARM_EABI
	fi

	defs=(
		MALLOC_GLIBC_COMPAT
		DO_C99_MATH
		UCLIBC_HAS_{CTYPE_CHECKED,WCHAR,HEXADECIMAL_FLOATS,GLIBC_CUSTOM_PRINTF,FOPEN_EXCLUSIVE_MODE,GLIBC_CUSTOM_STREAMS,PRINTF_M_SPEC}
		UCLIBC_HAS_FENV
		UCLIBC_HAS_{N,}FTW
		UCLIBC_HAS_GNU_GLOB
		UCLIBC_HAS_LIBUTIL
		UCLIBC_HAS_PROGRAM_INVOCATION_NAME
		UCLIBC_HAS_RESOLVER_SUPPORT
		UCLIBC_HAS_TZ_FILE_READ_MANY
		UCLIBC_HAS_UTMPX
		UCLIBC_SUPPORT_AI_ADDRCONFIG
		UCLIBC_SUSV3_LEGACY
		UCLIBC_SUSV3_LEGACY_MACROS
		UCLIBC_SUSV4_LEGACY
		UCLIBC_USE_NETLINK
		PTHREADS_DEBUG_SUPPORT
	)
	kconfig_q_opt y "${defs[@]}"
	kconfig_q_opt n UCLIBC_HAS_CTYPE_UNSAFE
	kconfig_q_opt n UCLIBC_HAS_LOCALE
	kconfig_q_opt n HAS_NO_THREADS
	kconfig_q_opt ipv6 UCLIBC_HAS_IPV6
	kconfig_q_opt nptl UCLIBC_HAS_THREADS_NATIVE
	kconfig_q_opt !nptl LINUXTHREADS_OLD
	kconfig_q_opt rpc UCLIBC_HAS_{,{FULL,REENTRANT}_}RPC
	kconfig_q_opt wordexp UCLIBC_HAS_WORDEXP
	kconfig_q_opt uclibc-compat UCLIBC_HAS_LIB{NSL,RESOLV}_STUB COMPAT_ATEXIT

	# we need to do it independently of hardened to get ssp.c built into libc
	kconfig_q_opt y UCLIBC_HAS_SSP
	kconfig_q_opt n UCLIBC_HAS_SSP_COMPAT
	kconfig_q_opt y UCLIBC_HAS_ARC4RANDOM
	kconfig_q_opt n PROPOLICE_BLOCK_ABRT
	kconfig_q_opt y PROPOLICE_BLOCK_SEGV

	# arm/mips do not emit PT_GNU_STACK, but if we enable this here
	# it will be emitted as RWE, ppc has to be checked, x86 needs it
	# this option should be used independently of hardened
	if has $(tc-arch) x86 || has $(tc-arch) ppc ; then
		kconfig_q_opt y UCLIBC_BUILD_NOEXECSTACK
	else
		kconfig_q_opt n UCLIBC_BUILD_NOEXECSTACK
	fi
	kconfig_q_opt y UCLIBC_BUILD_RELRO
	kconfig_q_opt hardened UCLIBC_BUILD_PIE
	kconfig_q_opt hardened UCLIBC_BUILD_NOW
	kconfig_q_opt !ssp SSP_QUICK_CANARY
	kconfig_q_opt ssp UCLIBC_BUILD_SSP

	local def
	for def in 1 2 ; do
		# Run twice as some config opts depend on others being enabled first.
		for def in ${defs_y[@]} ; do
			sed -i -e "s:.*\<${def}\>.*set:${def}=y:g" .config
		done
		for def in ${defs_n[@]} ; do
			sed -i -e "s:${def}=y:# ${def} is not set:g" .config
		done
		src_oldconfig
	done

	einfo "Enabled options:"
	for def in ${defs_y[@]} ; do
		einfo " " $(grep "^${def}=y" .config || echo "could not find ${def}")
	done
	einfo "Disabled options:"
	for def in ${defs_n[@]} ; do
		einfo " " $(grep "^# ${def} is not set" .config || echo "could not find ${def}")
	done

	# setup build and run paths
	sed -i \
		-e "/^CROSS_COMPILER_PREFIX/s:=.*:=\"${CTARGET}-\":" \
		-e "/^KERNEL_HEADERS/s:=.*:=\"$(alt_build_kprefix)\":" \
		-e "/^SHARED_LIB_LOADER_PREFIX/s:=.*:=\"/$(get_libdir)\":" \
		-e "/^DEVEL_PREFIX/s:=.*:=\"/usr\":" \
		-e "/^RUNTIME_PREFIX/s:=.*:=\"/\":" \
		-e "/^UCLIBC_EXTRA_CFLAGS/s:=.*:=\"${UCLIBC_EXTRA_CFLAGS}\":" \
		.config || die

	src_oldconfig
}

src_unpack() {
	if [[ ${PV} == "9999" ]] ; then
		git-2_src_unpack
	else
		unpack ${A}
	fi
	cd "${S}"
	if [[ -n ${PATCH_VER} ]] ; then
		EPATCH_SUFFIX="patch" epatch "${WORKDIR}"/patch
	fi

	epatch_user

	check_cpu_opts

	echo
	einfo "Runtime Prefix: /"
	einfo "Devel Prefix:   /usr"
	einfo "Kernel Prefix:  $(alt_build_kprefix)"
	einfo "CBUILD:         ${CBUILD}"
	einfo "CHOST:          ${CHOST}"
	einfo "CTARGET:        ${CTARGET}"
	einfo "CPU:            ${UCLIBC_CPU:-default}"
	einfo "ENDIAN:         $(uclibc_endian)"
	echo

	########## CPU SELECTION ##########

	local target config_target
	case $(tc-arch) in
		alpha) target="alpha";   config_target="no cpu-specific options";;
		amd64) target="x86_64";  config_target="no cpu-specific options";;
		arm)   target="arm";     config_target="GENERIC_ARM";;
		avr)   target="avr32";   config_target="no cpu-specific options";;
		bfin)  target="bfin";    config_target="no cpu-specific options";;
		ia64)  target="ia64";    config_target="no cpu-specific options";;
		m68k)  target="m68k";    config_target="no cpu-specific options";;
		mips)  target="mips";    config_target="MIPS_ISA_1";;
		ppc)   target="powerpc"; config_target="no cpu-specific options";;
		sh)    target="sh";      config_target="SH4";;
		sparc) target="sparc";   config_target="no cpu-specific options";;
		x86)   target="i386";    config_target="GENERIC_386";;
		*)     die "$(tc-arch) lists no defaults :/";;
	esac
	sed -i -e "s:default CONFIG_${config_target}:default CONFIG_${UCLIBC_CPU:-${config_target}}:" \
		extra/Configs/Config.${target}
	sed -i -e "s:^HOSTCC.*=.*:HOSTCC=$(tc-getBUILD_CC):" Rules.mak

	src_config

	if use iconv ; then
		# Run after make clean, otherwise files removed
		find ./extra/locale/charmaps -name "*.pairs" > extra/locale/codesets.txt
		if [[ ! -f /etc/locale.gen ]] ; then
			# See ./extra/locale/LOCALES for examples
			die "Please create an appropriate /etc/locale.gen for locale support"
		fi
		echo -e "@euro e\n@cyrillic c\n#---\nUTF-8 yes\n8-BIT yes\n#---\n\n" > ./extra/locale/locales.txt
		cat /etc/locale.gen >> ./extra/locale/locales.txt
	fi
}

src_compile() {
	emake headers || die
	just_headers && return 0

	emake || die
	if is_crosscompile ; then
		emake -C utils hostutils || die
	else
		emake utils || die
	fi
}

src_test() {
	is_crosscompile && return 0

	# assert test fails on pax/grsec enabled kernels - normal
	# vfork test fails in sandbox (both glibc/uclibc)
	emake UCLIBC_ONLY=1 check || die
}

src_install() {
	local sysroot=${D}
	is_crosscompile && sysroot+="/usr/${CTARGET}"

	local target="install"
	just_headers && target="install_headers"
	emake DESTDIR="${sysroot}" ${target} || die

	save_config .config

	# remove files coming from kernel-headers
	rm -rf "${sysroot}"/usr/include/{linux,asm*}

	# Make sure we install the sys-include symlink so that when
	# we build a 2nd stage cross-compiler, gcc finds the target
	# system headers correctly.  See gcc/doc/gccinstall.info
	if is_crosscompile ; then
		dosym usr/include /usr/${CTARGET}/sys-include
		if ! just_headers && [[ -n $(get_opt HAVE_SHARED) ]] ; then
			newbin utils/ldconfig.host ${CTARGET}-ldconfig || die
			newbin utils/ldd.host ${CTARGET}-ldd || die
		fi
		return 0
	fi

	emake DESTDIR="${D}" install_utils || die
	dobin extra/scripts/getent
	dodoc Changelog* README TODO docs/*.txt DEDICATION.mjn3
}

pkg_postinst() {
	is_crosscompile && return 0

	if [ ! -e "${ROOT}"/etc/TZ ] ; then
		ewarn "Please remember to set your timezone in /etc/TZ"
		mkdir -p "${ROOT}"/etc
		echo "UTC" > "${ROOT}"/etc/TZ
	fi
	[ "${ROOT}" != "/" ] && return 0
	# update cache before reloading init
	ldconfig
	# reload init ...
	/sbin/telinit U 2>/dev/null
}