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+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+inherit eutils subversion versionator
+
+DESCRIPTION="Yet another factoring utility"
+HOMEPAGE="http://sourceforge.net/projects/yafu/"
+#SRC_URI="mirror://sourceforge/${PN}/${PV}/${P}-src.zip"
+ESVN_REPO_URI="https://svn.code.sf.net/p/yafu/code/"
+
+SLOT="0"
+LICENSE="public-domain"
+KEYWORDS=""
+# nfs is overloaded, so using less confusing sieve here
+IUSE="+sieve"
+
+DEPEND="
+	dev-libs/gmp
+	sci-mathematics/gmp-ecm
+	sieve? (
+		sci-mathematics/msieve
+		sci-mathematics/ggnfs )"
+RDEPEND="${DEPEND}"
+
+src_prepare() {
+	cd trunk
+	# This is not nice. But then the Makefile is quite special :)
+	sed -i -e 's:../gmp/include:gmp:' Makefile 		|| die "Failed to rectify things"
+	sed -i -e 's:../gmp-ecm/include:gmp-ecm:' Makefile 	|| die "Failed to rectify things"
+	sed -i -e 's:LIBS += -L../:# LIBS += -L../:g' Makefile	|| die "Failed to rectify things"
+	sed -i -e 's:\"config.h\":<gmp-ecm/config.h>:g' top/driver.c	|| die "Failed to rectify things"
+	sed -i -e 's:# LIBS += -L../msieve/lib/linux/x86_64:LIBS += -lmsieve -lz -ldl:' Makefile	|| die "Failed to rectify things"
+	sed -i -e 's:CFLAGS = -g:#CFLAGS = -g:' Makefile	|| die "Failed to rectify things"
+	sed -i -e '/$(LIBS)$/s:$(CC):$(CC) $(LDFLAGS):g' Makefile || die
+
+	# proper ggnfs default path
+	sed -i -e 's~strcpy(fobj->nfs_obj.ggnfs_dir,"./");~strcpy(fobj->nfs_obj.ggnfs_dir,"/usr/bin/");~' factor/factor_common.c || die "Failed to rectify things"
+}
+
+src_compile() {
+	local VAR=""
+	cd trunk
+	# hmm, not that useful:
+	#VAR="TIMING=1 "
+	use sieve && VAR+="NFS=1"
+	use amd64 && emake $VAR x86_64
+	use x86 && emake $VAR x86
+}
+
+src_install() {
+	dobin "${S}/yafu"
+	dodoc docfile.txt README yafu.ini
+}