# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sci-mathematics/octave/octave-2.1.73-r2.ebuild,v 1.2 2007/07/13 05:28:09 mr_bones_ Exp $

inherit flag-o-matic fortran autotools

DESCRIPTION="GNU Octave is a high-level language (MatLab compatible) intended for numerical computations"
LICENSE="GPL-2"
HOMEPAGE="http://www.octave.org/"
SRC_URI="ftp://ftp.octave.org/pub/octave/${P}.tar.bz2"

SLOT="0"
IUSE="doc emacs hdf5 mpi readline static zlib"
KEYWORDS="~alpha ~amd64 ~ppc ~ppc64 ~sparc ~x86"

DEPEND="virtual/libc
	dev-util/dejagnu
	>=sys-libs/ncurses-5.2-r3
	>=sci-visualization/gnuplot-3.7.1-r3
	>=sci-libs/fftw-2.1.3
	>=dev-util/gperf-2.7.2
	virtual/blas
	virtual/lapack
	zlib? ( sys-libs/zlib )
	hdf5? ( sci-libs/hdf5 )
	doc? ( virtual/tetex )
	mpi? ( virtual/mpi )
	!=app-text/texi2html-1.70"

# NOTE: octave supports blas/lapack from intel but this is not open
# source nor is it free (as in beer OR speech) Check out...
# http://developer.intel.com/software/products/mkl/mkl52/index.htm for
# more information
FORTRAN="gfortran g77 f2c"

src_unpack() {
	unpack ${A}
	cd "${S}"

	# patch has already been applied upstream
	# epatch "${FILESDIR}"/${P}-gcc4.1-gentoo.patch

	# source file no longer exists
	# epatch "${FILESDIR}"/${PN}-example-fix.patch

	# patch target no longer exists
	# epatch "${FILESDIR}"/${P}-f2c-fix.patch

	# release 2.9.17 does not build octave.dvi by default
	# without this octave-install-doc will fail
	epatch "${FILESDIR}/${P}-octave.dvi.patch"

	eautoconf
}

src_compile() {
	filter-flags -ffast-math

	local myconf="--localstatedir=/var/state/octave --enable-rpath"
	myconf="${myconf} --enable-lite-kernel"
	use static || myconf="${myconf} --disable-static --enable-shared --enable-dl"
	# Only add -lz to LDFLAGS if we have zlib in USE !
	# BUG #52604
	# Danny van Dyk 2004/08/26
	use zlib && append-ldflags -lz

	# MPI requires the use of gcc/g++ wrappers
	# mpicc/mpic++
	# octave links agains -lmpi by default
	# mpich needs -lmpich instead
	if use mpi; then
		CC="mpicc" && CXX="mpiCC"
		if has_version 'sys-cluster/mpich'; then
			myconf="${myconf} --with-mpi=mpich"
		else
			myconf="${myconf} --with-mpi=mpi"
		fi
	else
		CC="$(tc-getCC)"
		CXX="$(tc-getCXX)"
		myconf="${myconf} --without-mpi"
	fi

	# force use of external blas and lapack
	myconf="${myconf} --with-blas=blas --with-lapack=lapack"

	CC="${CC}" CXX="${CXX}" \
	econf \
		$(use_with hdf5) \
		$(use_enable readline) \
		${myconf} \
		|| die "econf failed"

	emake || die "emake failed"
}

src_install() {
	make install DESTDIR="${D}" || die "make install failed"
	if use doc; then
		octave-install-doc || die "Octave doc install failed"
	fi
	if use emacs; then
		cd emacs
		exeinto /usr/bin
		# otags was changed to octave-tags
		doexe octave-tags || die
		doman octave-tags.1 || die
		for emacsdir in /usr/share/emacs/site-lisp /usr/lib/xemacs/site-lisp; do
			insinto ${emacsdir}
			doins *.el || die
		done
		cd ..
	fi
	dodir /etc/env.d || die
	echo "LDPATH=/usr/lib/octave-${PV}" > "${D}"/etc/env.d/99octave || die

	# Fixes ls-R files to remove /var/tmp/portage references.
	sed -i -e "s:${D}::g" "${D}"/usr/libexec/${PN}/ls-R || die
	sed -i -e "s:${D}::g" "${D}"/usr/share/${PN}/ls-R || die
}

pkg_postinst() {
	echo
	einfo "Some users have reported failures at running simple tests if"
	einfo "octave was built with agressive optimisations. You can check if"
	einfo "your setup is affected by this bug by running the following test"
	einfo "(inside the octave interpreter):"
	einfo
	einfo "octave:1> y = [1 3 4 2 1 5 3 5 6 7 4 5 7 10 11 3];"
	einfo "octave:2> g = [1 1 1 1 1 1 1 1 2 2 2 2 2 3 3 3];"
	einfo "octave:3> anova(y, g)"
	einfo
	einfo "If these commands complete successfully with no error message,"
	einfo "your installation should be ok. Otherwise, try recompiling"
	einfo "octave using less agressive \"CFLAGS\" (combining \"-O3\" and"
	einfo "\"-march=pentium4\" is known to cause problems)."
	echo
}

octave-install-doc() {
	echo "Installing documentation..."
	insinto /usr/share/doc/${PF}
	doins doc/faq/Octave-FAQ.dvi || die
	doins doc/interpreter/octave.dvi || die
	doins doc/liboctave/liboctave.dvi || die
	doins doc/refcard/refcard-a4.dvi || die
	doins doc/refcard/refcard-legal.dvi || die
	doins doc/refcard/refcard-letter.dvi || die
}