# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header$

RESTRICT="nostrip nomirror"
IUSE=""
HOMEPAGE="http://wwwasd.web.cern.ch/wwwasd/cernlib"
SRC_PATH="http://cernlib.web.cern.ch/cernlib/download/${PV}_source/tar"
SRC_URI="${SRC_PATH}/src_Imakefile.tar.gz
         ${SRC_PATH}/src_car.tar.gz
         ${SRC_PATH}/src_cfortran.tar.gz
         ${SRC_PATH}/src_cmz.tar.gz
         ${SRC_PATH}/src_config.tar.gz
         ${SRC_PATH}/src_geant321.tar.gz
         ${SRC_PATH}/src_graflib.tar.gz
         ${SRC_PATH}/src_include.tar.gz
         ${SRC_PATH}/src_mathlib.tar.gz
         ${SRC_PATH}/src_mclibs.tar.gz
         ${SRC_PATH}/src_packlib.tar.gz
         ${SRC_PATH}/src_patchy.tar.gz
         ${SRC_PATH}/src_pawlib.tar.gz
         ${SRC_PATH}/src_phtools.tar.gz
         ${SRC_PATH}/src_scripts.tar.gz
        "
PROVIDE="virtual/cernlib"
LICENSE="LGPL-BSD-as-is"
SLOT="0"
KEYWORDS="~x86 ~amd64"
DEPEND="virtual/lapack 
	!app-sci/cernlib-bin
        x11-libs/openmotif"
DESCRIPTION="CERN Program Library for Particle Physics: paw, mathlib, packlib, geant,.."

S=${WORKDIR}/${PV}

CERNDEST=/usr/lib/cern

#
# Note from cernlib source install web site:
#  "There are a number of products, mainly in "bin", which are 
#   not part of the standard build procedures. 
#   These include old stable products which are 
#   simply copied from previous releases as long as they keep working. 
#   There are the Patchy 4 programs (ypatchy etc.) 
#   and the Patchy 5 suite (nypatchy etc.). 
#   Other special programs may also be added as a 
#   convenience to certain users or as a backup. 
#   There may also be packages (e.g. Stdhep) which are 
#   not compiled at CERN and Cernlib is then only a distributor."
#

src_compile() {

	# env variables for local build.
	export CERN=${WORKDIR}
	export CERN_LEVEL=${PV}
	export CERN_ROOT=$CERN/$CERN_LEVEL
	export CVSCOSRC=$CERN_ROOT/src
	export PATH=${CERN_ROOT}/bin:${CERN_ROOT}/src/scripts:$PATH
	echo CERN=${CERN}
	echo CERN_LEVEL=${CERN_LEVEL}
	mkdir -p ${CERN_ROOT}/lib ${CERN_ROOT}/bin ${CERN_ROOT}/build

	# get blas/lapack libraries.
	ln -sv /usr/lib/liblapack.a ${CERN_ROOT}/lib/liblapack3.a
	ln -sv /usr/lib/libblas.a ${CERN_ROOT}/lib/libblas.a

	# compile and install locally
	cd $CERN_ROOT/build
	$CVSCOSRC/config/imake_boot
	make bin/kuipc
	make scripts/Makefile
	cd scripts
	make -k install.bin
	# make sure the install worked for those 3 execs.
	install -m 755 scripts/{cernlib,paw,gxint} ${CERN_ROOT}/bin
	cd $CERN_ROOT/build
	make  || die "make failed"
	for cerndir in cfortran  geant321  graflib  mathlib  mclibs  mgr  packlib  patchy  pawlib  phtools  scripts; do
		make -C ${cerndir} install.bin
	done

	 # prepare the includes for the install
        cp -rL ${CVSCOSRC}/include ${CERN_ROOT}
	rm -r ${CERN_ROOT}/include/*/CVS

        # test packlib and mathlib
	cd $CERN_ROOT/build/packlib
	make test
	cd $CERN_ROOT/build/mathlib
	make test

	# clean up ready for install
	rm ${CERN_ROOT}/lib/xsneut95.dat
	rm ${CERN_ROOT}/lib/liblapack3.a
	rm ${CERN_ROOT}/lib/libblas.a
}

src_install() {
	
	dodir ${CERNDEST}
	dodir ${CERNDEST}/${PV}
	dosym ${PV} ${CERNDEST}/pro

	# use copy to preserve the links. modes should be fine already
	cp -Rd include  ${D}${CERNDEST}/pro
	cp -Rd bin ${D}${CERNDEST}/pro
	cp -Rd lib ${D}${CERNDEST}/pro

	dodir /etc/env.d
	echo  -e "CERN=${CERNDEST}\nCERN_LEVEL=pro\nCERN_ROOT=${CERNDEST}/pro\nPATH=${CERNDEST}/pro/bin\nLDPATH=${CERNDEST}/pro/lib" \
	      > ${D}etc/env.d/99cernlib 
}

pkg_postinst () {
	einfo
	einfo " The cernlib is organized in ${CERNDEST}. "
	einfo " Some wrappers as shell scripts exist such as paw and cernlib"
	einfo " To link a piece of code with a cern library, use the cernlib script"
	einfo
}