# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7
inherit toolchain-funcs

DESCRIPTION="High-performance and portable C++ number theory library"
HOMEPAGE="https://www.shoup.net/ntl/"
SRC_URI="https://www.shoup.net/ntl/${P}.tar.gz"

LICENSE="LGPL-2.1+"
SLOT="0/43"
KEYWORDS="amd64 ppc x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos"
IUSE="bindist doc static-libs threads cpu_flags_x86_avx2"

BDEPEND="dev-lang/perl"
DEPEND="dev-libs/gmp:0=
	dev-libs/gf2x
	threads? ( >=dev-libs/gf2x-1.2 )"
RDEPEND="${DEPEND}"

S="${WORKDIR}/${P}/src"

REQUIRED_USE="bindist? ( !cpu_flags_x86_avx2 )"

DOCS=( "${WORKDIR}/${P}"/README )

src_configure() {
	# Currently the build system can build a static library or both
	# static and shared libraries, but not only shared libraries. The
	# name NTL_GMP_LIP is *not* a typo.
	perl DoConfig \
		PREFIX="${EPREFIX}"/usr \
		LIBDIR="${EPREFIX}"/usr/$(get_libdir) \
		CXXFLAGS="${CXXFLAGS}" \
		CPPFLAGS="${CPPFLAGS}" \
		LDFLAGS="${LDFLAGS}" \
		CXX="$(tc-getCXX)" \
		AR="$(tc-getAR)" \
		RANLIB="$(tc-getRANLIB)" \
		SHARED=on \
		NTL_GMP_LIP=on \
		NTL_GF2X_LIB=on \
		NTL_THREADS=$(usex threads on off) \
		NTL_ENABLE_AVX_FFT=$(usex cpu_flags_x86_avx2 on off) \
		NATIVE=$(usex bindist off on) \
		|| die "DoConfig failed"

	if use doc; then
		DOCS+=( "${WORKDIR}/${P}"/doc/*.txt )
		HTML_DOCS=( "${WORKDIR}/${P}"/doc/*.html "${WORKDIR}/${P}"/doc/*.gif )
	fi
}

src_install() {
	default
	if ! use static-libs; then
		rm "${ED}/usr/$(get_libdir)"/libntl.{la,a} || die
	fi

	rm -r "${ED}"/usr/share/doc/NTL || die
}