# Copyright 1999-2004 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2
# $Header: $

inherit eutils

DESCRIPTION="A serial or parallel linear system solver library based on iterative methods."
HOMEPAGE="http://www-unix.mcs.anl.gov/petsc/petsc-2/"
SRC_URI="ftp://ftp.mcs.anl.gov/pub/petsc/${PN}.tar.gz"

LICENSE="TO_DEFINE"

SLOT="0"

KEYWORDS="~x86 ~ppc"

IUSE="mpi X fortran"

RDEPEND="mpi? ( sys-cluster/mpich )
	!sys-cluster/lam-mpi
    virtual/lapack
	virtual/blas"

MY_PV=${P/_p/-p}
S1=${WORKDIR}/${MY_PV}
S=${WORKDIR}/${PN}

src_unpack() {
	unpack ${A}
	mv ${S1} ${S}
	cd ${S}
	epatch "${FILESDIR}"/root_priv.patch
#this will help in the configure part. It will be installed in /opt/petsc
}

petsc_test() {
        eerror
        eerror "PETSc  test failed."
        eerror "Do emerge -C petsc"	
        eerror
        die 
}


src_compile() {
	export PETSC_DIR=${S} || die
	
	local myconf=""

	use mpi && myconf="${myconf} --with-mpi=1 --with-mpi-compiler=1" || myconf="${myconf} --with-mpi=0"
    	
	use X && myconf="${myconf} --with-X=1" || myconf="${myconf} --with-X=0"
	
	use fortran && myconf="${myconf} --with-fortran=1" || myconf="${myconf} --with-fortran=0"
	
	myconf="${myconf} --with-clanguage=C  --with-matlab=0 --with-python=0 \
	--with-shared=0 --prefix=/opt/ -PETSC_DIR=$PETSC_DIR"
#--with-gcov=1

	export OPT_D="-PETSC_ARCH=linux_opt_d --with-precision=double --with-debugging=no"
	
	export OPT_M="-PETSC_ARCH=linux_opt_m --with-precision=matsingle --with-debugging=no"
	
	export OPT_S="-PETSC_ARCH=linux_opt_s --with-precision=single --with-debugging=no"

	export DEB_D="-PETSC_ARCH=linux_deb_d --with-precision=double --with-debugging=yes"

	export DEB_M="-PETSC_ARCH=linux_deb_m --with-precision=matsingle --with-debugging=yes"

	export DEB_S="-PETSC_ARCH=linux_deb_s --with-precision=single --with-debugging=yes"
	
	./config/configure.py ${myconf} ${OPT_D}  || die "PETSc OPT_D config failed."
	./config/configure.py ${myconf} ${OPT_M}  || die "PETSc OPT_M config failed."
	./config/configure.py ${myconf} ${OPT_S}  || die "PETSc OPT_S config failed."	

	./config/configure.py ${myconf} ${DEB_D}  || die "PETSc DEB_D config failed."
	./config/configure.py ${myconf} ${DEB_M}  || die "PETSc DEB_M config failed."
	./config/configure.py ${myconf} ${DEB_S}  || die "PETSc DEB_S config failed."	

	export PETSC_ARCH=linux_opt_d
	make all || die "error in make opt_d"
	export PETSC_ARCH=linux_opt_m
	make all || die "error in make opt_m"
	export PETSC_ARCH=linux_opt_s
	make all || die "error in make opt_s"

	export PETSC_ARCH=linux_deb_d
	make all || die "error in make deb_d"
	export PETSC_ARCH=linux_deb_m
	make all || die "error in make deb_m"
	export PETSC_ARCH=linux_deb_s
	make all || die "error in make deb_s"
}

src_install() {
#	cd ${S} || die
	export PETSC_ARCH="linux_deb_s" || die
	export PETSC_DIR=${S} || die
	make INSTALL_DIR="${D}/opt/${PN}" install || die
	make INSTALL_DIR="${D}/opt/${PN}" install_src || die
	make INSTALL_DIR="${D}/opt/${PN}" install_docs || die


	export PETSC_ARCH="linux_deb_m" || die
	make INSTALL_DIR="${D}/opt/${PN}" install || die

	export PETSC_ARCH="linux_deb_d" || die
	make INSTALL_DIR="${D}/opt/${PN}" install || die

	export PETSC_ARCH="linux_opt_s" || die
	make INSTALL_DIR="${D}/opt/${PN}" install || die

	export PETSC_ARCH="linux_opt_m" || die
	make INSTALL_DIR="${D}/opt/${PN}" install || die

	export PETSC_ARCH="linux_opt_d" || die
	make INSTALL_DIR="${D}/opt/${PN}" install || die

	# fix the libtool .la files
	#LAOBJS=`find  . | grep  ".la$"`
	#dosed -i -e "s:${WORKDIR}:/opt:g" ${LAOBJS}

	# fix broken libtool executable stuff
	#dosed -i -e "s:${SHELL} ${top_builddir}/libtool:`which libtool`:g" bmake/linux_local/variables
	#dosed -i -e "s:/bin/sh /opt/petsc/libtool:`which libtool`:g" bmake/linux_local/petscmachineinfo.h
}


pkg_preinst() {
	# replace this with doenvd (doenv?)
	dodir /etc/env.d

	echo "PATH=/opt/${PN}/bin"      > ${D}/etc/env.d/33${PN}
	echo "PETSC_DIR=/opt/${PN}"    >> ${D}/etc/env.d/33${PN}
	echo "PETSC_ARCH=linux_deb_s"  >> ${D}/etc/env.d/33${PN}
}

pkg_postinst() {
	einfo "If it is a binary installation, the tests will not be run."
	if [ -d ${S} ] ; then
		cd ${S}
		export PETSC_ARCH="linux_deb_s" || die
		export PETSC_DIR=${S} || die
		make test || petsc_test
		einfo "Running env-update to add the binaries to the PATH and"
		einfo "to add the PETSC_ARCH and PETSC_DIR variables"
		einfo "to the environment"

		/usr/sbin/env-update && source /etc/profile
	fi

	#einfo "Need to modify some .la in the library dirs and the bmake/linux_local/petscmachineinfo.h"
}