# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$

inherit toolchain-funcs multilib

DESCRIPTION="machine-learning library, written in simple C++"
HOMEPAGE="http://www.torch.ch/"
SRC_URI="http://www.torch.ch/archives/Torch${PV}src.tgz
	doc? ( http://www.torch.ch/archives/Torch3doc.tgz )"

LICENSE="BSD"
SLOT="0"
KEYWORDS="x86 ~amd64"
IUSE="doc debug"

DEPEND=""

S=${WORKDIR}/Torch${PV}

torch_packages="convolutions datasets decoder distributions gradients kernels matrix nonparametrics speech"

src_compile() {
	local shalldebug="OPT"
	use debug && shalldebug="DBG"
	# -malign-double makes no sense on a 64-bit arch
	use amd64 || extraflags="-malign-double"
	cp config/Makefile_options_Linux .
	sed -i \
		-e "s:^PACKAGES.*:PACKAGES = ${torch_packages}:" \
		-e "s:^DEBUG.*:DEBUG = ${shalldebug}:" \
		-e "s:^CFLAGS_OPT_FLOAT.*:CFLAGS_OPT_FLOAT = -Wall ${CFLAGS} -ffast-math ${extraflags}:" \
		Makefile_options_Linux

	make depend
	emake || die "emake failed"
}

src_install() {
	dolib lib/*/*.a
	dodir /usr/include/torch
	insinto /usr/include/torch
	for directory in core ${torch_packages}; do
		doins ${directory}/*.h
	done
	# prepare the options Makefile
	sed -i \
		-e "s:^LIBS_DIR.*:LIBS_DIR=/usr/$(get_libdir):" \
		-e 's|^INCS := .*|INCS := -I /usr/include/torch $(MYINCS)|' \
		-e '/^INCS +=/c\\' \
		Makefile_options_Linux
	dodir /usr/share/${PN}
	insinto /usr/share/${PN}
	doins Makefile_options_Linux
	dodir /usr/share/doc/${PF}
	insinto /usr/share/doc/${PF}
	cp -pPR examples "${D}"/usr/share/doc/${PF}
	cd "${D}"/usr/share/doc/${PF}
	sed -i \
		-e 's|^TORCHDIR.*|TORCHDIR := /usr/share/torch|' \
		-e '/MAKE/c\\' -e '/VERSION_KEY/c\\' \
		examples/*/Makefile
	for ex in examples/*/Makefile; do
		echo -e '\t$(CC) $(CFLAGS_$(MODE)) $(INCS) -o $@ $< $(LIBS)' >> ${ex}
	done
	if use doc; then
		cd "${WORKDIR}"/docs
		doins *.pdf
		dohtml -r manual/.
	fi
}