# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sci-mathematics/octave/octave-2.1.57-r1.ebuild,v 1.10 2007/11/20 14:46:56 markusle Exp $

inherit flag-o-matic

DESCRIPTION="GNU Octave is a high-level language (MatLab compatible) intended for numerical computations"
HOMEPAGE="http://www.octave.org/"
SRC_URI="ftp://ftp.octave.org/pub/octave/bleeding-edge/${P}.tar.bz2
		ftp://ftp.math.uni-hamburg.de/pub/soft/math/octave/${P}.tar.bz2"

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="x86 ppc alpha ~sparc amd64"
IUSE="emacs static readline zlib latex hdf5 mpi ifc blas"

DEPEND="virtual/libc
	>=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
	zlib? ( sys-libs/zlib )
	hdf5? ( sci-libs/hdf5 )
	latex? ( virtual/latex-base )
	x86? ( ifc? ( dev-lang/ifc ) )
	blas? ( virtual/blas )"

# 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

pkg_setup() {
	use ifc || if [[ -z $(type -P g77) ]]; then
		#if ifc is defined then the dep was already checked
		eerror "No fortran compiler found on the system!"
		eerror "Please add fortran to your USE flags and reemerge gcc!"
		die
	fi
}

src_compile() {
	filter-flags -ffast-math

	local myconf

	use static || myconf="--disable-static --enable-shared --enable-dl"
	use readline || myconf="${myconf} --disable-readline"
	use hdf5 || myconf="${myconf} --without-hdf5"
	use mpi  || myconf="${myconf} --without-mpi"

	# Only add -lz to LDFLAGS if we have zlib in USE !
	# BUG #52604
	# Danny van Dyk 2004/08/26
	use zlib && LDFLAGS="${LDFLAGS} -lz"

	# NOTE: This version actually works with gcc-3.x
	./configure ${myconf} --prefix=/usr \
		--sysconfdir=/etc \
		--localstatedir=/var/state/octave \
		--infodir=/usr/share/info \
		--mandir=/usr/share/man \
		--host=${CHOST} \
		--build=${CHOST} \
		--target=${CHOST} \
		--enable-rpath \
		--enable-lite-kernel \
		LDFLAGS="${LDFLAGS}" || die "configure failed"

	emake || die "emake failed"
}

src_install() {
	make \
		prefix=${D}/usr \
		mandir=${D}/usr/share/man \
		infodir=${D}/usr/share/info \
		install || die "make install failed"
	use latex && octave-install-doc
	if use emacs; then
		cd emacs
		exeinto /usr/bin
		doexe otags
		doman otags.1
		for emacsdir in /usr/share/emacs/site-lisp /usr/lib/xemacs/site-lisp; do
			insinto ${emacsdir}
			doins *.el
		done
		cd ..
	fi
	dodir /etc/env.d
	echo "LDPATH=/usr/lib/octave-${PV}" > "${D}"/etc/env.d/99octave
}

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
	doins doc/interpreter/octave.dvi
	doins doc/liboctave/liboctave.dvi
	doins doc/refcard/refcard-a4.dvi
	doins doc/refcard/refcard-legal.dvi
	doins doc/refcard/refcard-letter.dvi
}