# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

DESCRIPTION="number theory and algebraic geometry software"
HOMEPAGE="http://modular.math.washington.edu/sage/"
SRC_URI="http://modular.math.washington.edu/sage/dist/src/${P}.tar"

inherit eutils flag-o-matic fortran

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="x86 ppc"
IUSE=""

DEPEND="sys-devel/flex
	dev-lang/perl
	|| (sys-devel/bison dev-util/yacc)
   app-arch/bzip2
   sys-libs/readline
   sys-libs/zlib
   >=net-libs/gnutls-1.6.3
   >=media-libs/libpng-1.2.22
   >=media-libs/freetype-2.3.5
   >=sci-libs/gsl-1.9
   >=sci-libs/blas-atlas-3.8.0
   >=sci-libs/lapack-atlas-3.8.0
   >=dev-db/sqlite-3
   media-libs/gd
   sci-mathematics/maxima"

# linbox doesn't configure properly with -Wl,--as-needed so I zap it.
filter-ldflags -Wl,--as-needed
#  lcalc has problem with some optimizations enabled by -march=native on an athlon-4.
#  Until we can find what exactly is wrong, I filter all -march= setting.
#  I'll be glad if someone can point to a better way to do it or which which flag to suppress.
#  The error is :
#  /scratch/portage/sci-mathematics/sage-2.9.1.1/temp/ccHexhRT.o: In function `__exchange_and_add':
#  /usr/lib/gcc/i686-pc-linux-gnu/4.2.2/include/g++-v4/ext/atomicity.h:51: undefined reference to `__sync_fetch_and_add_4'
#
ARCHFLAG=$(get-flag -march)
filter-flags ${ARCHFLAG}

pkg_setup() {
	FORTRAN="gfortran"
	fortran_pkg_setup
}

src_unpack() {
   ewarn "maxima cannot be called from sage if built with sbcl"
   ewarn "it works with clisp, cmucl and possibly gcl"
	unpack ${A}
   cd ${S}
   echo 'patching in progress'
#  bypass the sage fortran package alltogether and set sage_fortran
#  to be gfortran.
   epatch $FILESDIR/prereq.patch
   cp $FILESDIR/which_fortran ${S}/spkg/base/
   cp $FILESDIR/sage_fortran ${S}/spkg/base/
#  change the deps file to only build what we want to be internal.
   epatch $FILESDIR/deps.patch
	cd ${S}/spkg/standard
###################################################################
#     comment as I reverted to using internal gmp/mpfr because
#        problems from a sage-gmp patch.
###################################################################
#  patching mpfi spkg
#  fix spkg-install so mpfi can be find external gmp and mpfr
#   tar xfj mpfi-1.3.4-cvs20071125.p2.spkg
#   rm mpfi-1.3.4-cvs20071125.p2.spkg
#   epatch $FILESDIR/mpfi-build.patch
#   tar cjf mpfi-1.3.4-cvs20071125.p2.spkg mpfi-1.3.4-cvs20071125.p2
#   rm -rf mpfi-1.3.4-cvs20071125.p2
#  patching genus2reduction spkg
#  fix the header from pari.h to pari/pari.h and the compiler options
#  accordingly
####################################################################
#     Switch back to internal pari until gentoo provides the
#     newest version and includes gallois data.
####################################################################
#   tar xfj genus2reduction-0.3.spkg
#   rm genus2reduction-0.3.spkg
#   epatch $FILESDIR/genus2reduction-spkg.patch
#   epatch $FILESDIR/genus2reduction.patch
#   tar cjf genus2reduction-0.3.spkg genus2reduction-0.3
#   rm -rf genus2reduction-0.3
#  patching lcalc
#  Another pari header fix (2 files) and adjust the makefile
#   tar xjf lcalc-20070107.p0.spkg
#   rm lcalc-20070107.p0.spkg
#   epatch $FILESDIR/lcalc.patch
#   tar cjf lcalc-20070107.p0.spkg lcalc-20070107.p0
#   rm -rf lcalc-20070107.p0
#  patching scipy
#  fix to find external blas atlas.
   tar xjf scipy-20071020-0.6.p2.spkg
   rm scipy-20071020-0.6.p2.spkg
   epatch $FILESDIR/scipy.patch
   tar cjf scipy-20071020-0.6.p2.spkg scipy-20071020-0.6.p2
   rm -rf scipy-20071020-0.6.p2
#  patching scipy_sandbox
#  fix to find external blas atlas.
   tar xjf scipy_sandbox-20071020.spkg
   rm scipy_sandbox-20071020.spkg
   epatch $FILESDIR/scipy_sandbox.patch
   tar cjf scipy_sandbox-20071020.spkg scipy_sandbox-20071020
   rm -rf scipy_sandbox-20071020
#  patching cvxopt
#  forget about f77blas which should be provided by blas
#  [equivalent of Gentoo blas-reference but providing f77blas]
   tar xjf cvxopt-0.9.p5.spkg
   rm cvxopt-0.9.p5.spkg
   epatch $FILESDIR/cvxopt.patch
   tar cjf cvxopt-0.9.p5.spkg cvxopt-0.9.p5
   rm -rf cvxopt-0.9.p5
   echo 'patching done'
}

src_compile() {
	emake || die "make failed"
	if ( grep "sage: An error occurred" ${S}/install.log ); then
		die "make failed"
	fi
}

src_install() {
	make DESTDIR="${D}/opt" install
	sed -i "s/SAGE_ROOT=.*\/opt/SAGE_ROOT=\"\/opt/" "${D}/opt/bin/sage" "${D}/opt/sage/sage"
}

src_postinstall(){
#  make sure file are correctly setup in the new location by running
#  sage as root. This prevent nasty message to be presented to the user.
   sage -v
}