# 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"

IUSE="mpi X"

RDEPEND="mpi? ( sys-cluster/mpich )
	!sys-cluster/mpich2
	!sys-cluster/lam-mpi
                     virtual/lapack
	virtual/blas
	sys-devel/libtool"

# need find during install process
DEPEND="sys-apps/findutils
	sys-apps/sed
	${RDEPEND}"

S1=${WORKDIR}/${P}
S=${WORKDIR}/${PN}

src_unpack() {
	unpack ${A}
	mv ${S1} ${S}
	cd ${S}
#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() {

	use mpi || myconf="--with-mpi=0"
    use X && myconf="--with-X=1" || myconf="--with-X=0"


	export PETSC_ARCH="linux_local" || die
	export PETSC_DIR=${S} || die

	./config/configure.py ${myconf} \
	--prefix=/opt/ \
                    -PETSC_ARCH=$PETSC_ARCH \
	-PETSC_DIR=$PETSC_DIR \
	--with-gcov=1 \
	--with-default-language=c \
	--with-libtool=1 \
	--CFLAGS="-fno-strict-aliasing" \
	--CXXFLAGS="-fno-strict-aliasing" \
	-CFLAGS_g="-ggdb -ggdb3" \
	-CFLAGS_O="$CFLAGS" \
	--with-mpi-compiler=0 \
	--with-mpi-dir=/usr/ \
	 --with-matlab=0 || die "PETSc config failed."
	make BOPT=g all || die
	make BOPT=O all || die
}

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

	# 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_local"      >> ${D}/etc/env.d/33${PN}
}




pkg_postinst() {
	einfo "If it is a binary installation, the tests will not be run."
	if [ -d ${S} ] ; then
		cd ${S}
		export PETSC_ARCH="linux_local" || die
		export PETSC_DIR=${S} || die
		make BOPT=g test || petsc_test
		make BOPT=O 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"

}