# Copyright 1999-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$

inherit flag-o-matic eutils libtool toolchain-funcs

DESCRIPTION="Library for arithmetic on arbitrary precision integers, rational numbers, and floating-point numbers"
HOMEPAGE="http://gmplib.org/"
SRC_URI="mirror://gnu/${PN}/${P}.tar.bz2"
#	doc? ( http://www.nada.kth.se/~tege/${PN}-man-${PV}.pdf )"

LICENSE="LGPL-3"
SLOT="0"
KEYWORDS="alpha amd64 arm hppa ia64 m68k ~mips ppc ppc64 s390 sh sparc x86 ~sparc-fbsd ~x86-fbsd"
IUSE="cxx" #doc

DEPEND="sys-devel/m4"
RDEPEND=""

src_unpack() {
	unpack ${A}
	cd "${S}"
	[[ -d ${FILESDIR}/${PV} ]] && EPATCH_SUFFIX="diff" EPATCH_FORCE="yes" epatch "${FILESDIR}"/${PV}
	epatch "${FILESDIR}"/${PN}-4.1.4-noexecstack.patch
	epatch "${FILESDIR}"/${PN}-5.0.0-s390.diff

	# disable -fPIE -pie in the tests for x86  #236054
	if use x86 && gcc-specs-pie ; then
		epatch "${FILESDIR}"/${PN}-5.0.1-x86-nopie-tests.patch
	fi

	# note: we cannot run autotools here as gcc depends on this package
	elibtoolize

	# GMP uses the "ABI" env var during configure as does Gentoo (econf).
	# So, to avoid patching the source constantly, wrap things up.
	mv configure configure.wrapped || die
	cat <<-\EOF > configure
	#!/bin/sh
	exec env ABI="$GMPABI" "${0}.wrapped" "$@"
	EOF
	chmod a+rx configure
}

src_compile() {
	# Because of our 32-bit userland, 1.0 is the only HPPA ABI that works
	# http://gmplib.org/manual/ABI-and-ISA.html#ABI-and-ISA (bug #344613)
	if [[ ${CHOST} == hppa2.0-* ]] ; then
		export GMPABI="1.0"
	fi

	# ABI mappings (needs all architectures supported)
	case ${ABI} in
		32|x86)       GMPABI=32;;
		64|amd64|n64) GMPABI=64;;
		o32|n32)      GMPABI=${ABI};;
	esac
	export GMPABI

	tc-export CC
	econf \
		--localstatedir=/var/state/gmp \
		--disable-mpbsd \
		$(use_enable cxx) \
		|| die "configure failed"

	emake || die "emake failed"
}

src_install() {
	emake DESTDIR="${D}" install || die "make install failed"

	dodoc AUTHORS ChangeLog NEWS README
	dodoc doc/configuration doc/isa_abi_headache
	dohtml -r doc

	#use doc && cp "${DISTDIR}"/gmp-man-${PV}.pdf "${D}"/usr/share/doc/${PF}/
}

pkg_preinst() {
	preserve_old_lib /usr/$(get_libdir)/libgmp.so.3
}

pkg_postinst() {
	preserve_old_lib_notify /usr/$(get_libdir)/libgmp.so.3
}