proj/gentoo: Initial commit

This commit represents a new era for Gentoo:
Storing the gentoo-x86 tree in Git, as converted from CVS.

This commit is the start of the NEW history.
Any historical data is intended to be grafted onto this point.

Creation process:
1. Take final CVS checkout snapshot
2. Remove ALL ChangeLog* files
3. Transform all Manifests to thin
4. Remove empty Manifests
5. Convert all stale $Header$/$Id$ CVS keywords to non-expanded Git $Id$
5.1. Do not touch files with -kb/-ko keyword flags.

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
X-Thanks: Alec Warner <antarus@gentoo.org> - did the GSoC 2006 migration tests
X-Thanks: Robin H. Johnson <robbat2@gentoo.org> - infra guy, herding this project
X-Thanks: Nguyen Thai Ngoc Duy <pclouds@gentoo.org> - Former Gentoo developer, wrote Git features for the migration
X-Thanks: Brian Harring <ferringb@gentoo.org> - wrote much python to improve cvs2svn
X-Thanks: Rich Freeman <rich0@gentoo.org> - validation scripts
X-Thanks: Patrick Lauer <patrick@gentoo.org> - Gentoo dev, running new 2014 work in migration
X-Thanks: Michał Górny <mgorny@gentoo.org> - scripts, QA, nagging
X-Thanks: All of other Gentoo developers - many ideas and lots of paint on the bikeshed

14 files changed, 2665 insertions, 0 deletions

diff --git a/sci-physics/lammps/Manifest b/sci-physics/lammps/Manifest
new file mode 100644
index 000000000000..67afd43f390d
--- /dev/null
+++ b/sci-physics/lammps/Manifest
@@ -0,0 +1,10 @@
+DIST lammps-10Feb15.tar.gz 62912048 SHA256 59373e9b5592f7b697a144bbce1fb742726e03536b7bb355dac7a9e013ddf9b8 SHA512 a7804377a23f03f338bdaf443439dffcdc52293b4c45e6369b340a1107510fed0b8a198e3b5afcff2e04e109985b52ee62e7b28276697bae37ac6f783d1ab9f2 WHIRLPOOL 09f29cadf8b072d388abe45ec219341d2a14a6c9cc9e4010a0f7945e930e9984738f7837748d117ab95ca76ce0c8d9160fe88dcec17e8d21b81f385dec8f7005
+DIST lammps-15May15.tar.gz 63835027 SHA256 0233ea98c7d77d31bd0a538bb674c0ee8f000f1d0ee1b8c049072873192aa228 SHA512 a23c16b98117590b15ca7662b878fb2f76ec41399c329c98deb48e28a0ffce293443269513a96c2503389894b598787b19dadc210d4b4dbc6a7432caf633e7d1 WHIRLPOOL 4c4edfd772bbf534e42fc43e1feaf3b8f76e74c58ec1e985e3c29ee0d8e64aa8c501b8e45e078643409c320a1d834b0d5eb699e7d1ec29df06be0126d12492f1
+DIST lammps-16Apr15.tar.gz 63842472 SHA256 65aecf6f25a055734ef113890a86ecbf7f8478105238c507e5f9bcbeb657bc99 SHA512 95639145db66e76bd27a865849dc0ad15d3920f7ca9f1fb9a426e457376d0c939c57440e89fa6903d1989ca5e5c6c97d8d283928e1dbf33dd94ba88dbb05a252 WHIRLPOOL 422f6814093f22820cfd8fada1d97735c1a8f0388b34e6bad49e361e411b254ea89e6bf7afa8390c0cba1371a6d038fa84cf93583568c5223e42d95210f13515
+DIST lammps-18Apr15.tar.gz 63883297 SHA256 4ce74978da738383a1d808a37481c3c43d4f8f44d919770b3f2cdd4fcf03345b SHA512 be088ec59b7fe495fff3cdfcc5ccb52d2705eec20deb5c8694a215943786652c9dc22a81ba48324707495c3f56c0c347af964d1952ae077c8db02258cf31387a WHIRLPOOL c90403147cc4eda5b4f581cd1bd18bcc8f45a73b1d0e51dcd64c52fc636116c9d57337b89b5753c86e1bbf386f8a2391a9813a6e32154a819f3e35cfc816b5e2
+DIST lammps-18Jul15.tar.gz 66065642 SHA256 deb6625b7c21cf94fc7ee9aefb2edf55a6c8dc870e919028c9ffa1cd169d57ed SHA512 d26dd0084779e037af35bc26f81cdca5a7617f841860e6eab7d52f6c023d2c001075aad5dc3d656ceb6e92650589acc472fa5c8954fd9ab81ec0b737e377284b WHIRLPOOL 66794b7250cdb077bcbeb2b95a464aecc684f7592d81f3db4a3702195ef1d8404eb4b1f38e6c1dd859a42dd8ca1ebd039cbac4d9fd11be99a376168f2c498cdd
+DIST lammps-21Jul15.tar.gz 66715434 SHA256 2e24a7b6131a35ef83cec08f4dc9f7cc5188c59a630ba61f2a8ac3cfbd284ef7 SHA512 cbf39b3559ac60d5ad92299370bf9af76c0bd7fec62dbaa429d5127d561978426d16b03510b815ffeb6b0acdb362523809adf7ac3fbc2fea8cc484010b1ef7bc WHIRLPOOL 41df92b1f5baf52e846032f12c80f813b84fcd1c71f8c7dad5594780da154345d1b1bdea6b68f4c4b71029346d74d4ff3a813f1101437a01be65df7cf6d0d246
+DIST lammps-22Jul15.tar.gz 67275212 SHA256 b75cdf8ead17f20433737c203c8d29c0cc3e157c9b3d175093467873aea0b869 SHA512 f6e5eaf3ca8bcd25a580a4608e0aec0021f2ed5eb23cf9ccd0a707cb8bc320568504ccffc25cccb5acfe2fc3515c58f8afc8936aea63acb3062bdc897a5eb2ee WHIRLPOOL 13c09e1045a0bdabe15e2125ccef0ea622cb12fcce63d8441b7f9843b8f1a3f7aa0c13908a2e215c1fdba8a579a17a5833111b5cf31a2471bf66e781ef281c59
+DIST lammps-24Jul15.tar.gz 67180142 SHA256 bd183f7b073e1ca86656a8f6ea99195123ce3c7829c872ca45216da4132ff96d SHA512 e285a1f326658bd23f32ecf9409d9f0bf16ed635656bbcee0d84da58e1c008363c7815001bcaa5b7701d99b3318a56240b021447e94754607c2ceb178e377122 WHIRLPOOL 003237f8e9a7caec98aa1f8f0c5e03c0cda6d60f20460e32c4eea3c92707e349f4e1a71510f1290b6e6aeac1621951080f904b1bb2224c8eb9e25067206d2b1b
+DIST lammps-28Apr15.tar.gz 63883556 SHA256 6e7c32690cf8bb5a4fb147bab6029cc1d03594ec7b3ea3833e7dc89acc596d8a SHA512 414c786e8666cddd31a3200baedc76974371280dc219636914dd7863f03e32e11f637a9c184af78d8d4da22afe4cf734b6a0eb32c78d6f53ee95d796a3e080c0 WHIRLPOOL c57a91f9d5e977d26cdb2076b5bbd2f3b5791396c23b5326f16cc609b9646e80c602a492b312b4e5f78d1d638c4a6b66e9a49b1ced02274ad7202821a2884975
+DIST lammps-30Apr15.tar.gz 63892754 SHA256 d4a193fd5aa9417ec9d15a3be1e2b149302aacf3d9321886a806b0f4ca91611e SHA512 889fc315719e6f50f802b72a8a0c6e6d7eedb84b67e8b39ae9ea93feb2d526914639848cbfbcbb6dd8b8718c3b332f617f001c6ef04fe14d0685106fcac821bd WHIRLPOOL a681662a0c37fcb701ced8f2cd4f085dfd0ff250faac2c62abd07b718e3bf12ddbf366f725fbc21bc4547e6ef3ca3042ee84571a1fa0277a4c3d7d273ccaa099
diff --git a/sci-physics/lammps/files/lammps-python3.patch b/sci-physics/lammps/files/lammps-python3.patch
new file mode 100644
index 000000000000..1937881c9339
--- /dev/null
+++ b/sci-physics/lammps/files/lammps-python3.patch
@@ -0,0 +1,11 @@
+--- lammps-11Apr15/python/lammps.py	2015-03-13 16:06:20.000000000 -0600
++++ lammps-11Apr15-new/python/lammps.py	2015-04-13 09:40:43.000000000 -0600
+@@ -28,7 +28,7 @@
+     except:
+       type,value,tb = sys.exc_info()
+       traceback.print_exception(type,value,tb)
+-      raise OSError,"Could not load LAMMPS dynamic library"
++      raise OSError("Could not load LAMMPS dynamic library")
+ 
+     # if no ptr provided, create an instance of LAMMPS
+     #   don't know how to pass an MPI communicator from PyPar
diff --git a/sci-physics/lammps/files/python-shebang.patch b/sci-physics/lammps/files/python-shebang.patch
new file mode 100644
index 000000000000..7dd45797d4ad
--- /dev/null
+++ b/sci-physics/lammps/files/python-shebang.patch
@@ -0,0 +1,7 @@
+--- lammps-25Mar15/python/lammps.py	2015-03-13 16:06:20.000000000 -0600
++++ lammps-25Mar15-new/python/lammps.py	2015-04-10 15:31:14.000000000 -0600
+@@ -1,3 +1,4 @@
++#!/usr/bin/env python
+ # ----------------------------------------------------------------------
+ #   LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
+ #   http://lammps.sandia.gov, Sandia National Laboratories
diff --git a/sci-physics/lammps/lammps-20150210.ebuild b/sci-physics/lammps/lammps-20150210.ebuild
new file mode 100644
index 000000000000..b450fcc7a7e4
--- /dev/null
+++ b/sci-physics/lammps/lammps-20150210.ebuild
@@ -0,0 +1,206 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+inherit eutils flag-o-matic fortran-2 multilib
+
+convert_month() {
+	case $1 in
+		01) echo Jan
+			;;
+		02) echo Feb
+			;;
+		03) echo Mar
+			;;
+		04) echo Apr
+			;;
+		05) echo May
+			;;
+		06) echo Jun
+			;;
+		07) echo Jul
+			;;
+		08) echo Aug
+			;;
+		09) echo Sep
+			;;
+		10) echo Oct
+			;;
+		11) echo Nov
+			;;
+		12) echo Dec
+			;;
+		*)  echo unknown
+			;;
+	esac
+}
+
+MY_P=${PN}-$((10#${PV:6:2}))$(convert_month ${PV:4:2})${PV:2:2}
+
+DESCRIPTION="Large-scale Atomic/Molecular Massively Parallel Simulator"
+HOMEPAGE="http://lammps.sandia.gov/"
+SRC_URI="http://lammps.sandia.gov/tars/${MY_P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="amd64 x86"
+IUSE="doc examples gzip lammps-memalign mpi static-libs"
+
+DEPEND="
+	mpi? (
+		virtual/blas
+		virtual/lapack
+		virtual/mpi
+	)
+	sci-libs/voro++
+	"
+RDEPEND="${DEPEND}"
+
+S="${WORKDIR}/${MY_P}"
+
+lmp_emake() {
+	local LAMMPS_INCLUDEFLAGS
+	LAMMPS_INCLUDEFLAGS="$(usex gzip '-DLAMMPS_GZIP' '')"
+	LAMMPS_INCLUDEFLAGS+="$(usex lammps-memalign ' -DLAMMPS_MEMALIGN' '')"
+
+	# The lammps makefile uses CC to indicate the C++ compiler.
+	emake \
+		ARCHIVE=$(tc-getAR) \
+		CC=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		F90=$(usex mpi "mpif90" "$(tc-getFC)") \
+		LINK=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		CCFLAGS="${CXXFLAGS}" \
+		F90FLAGS="${FCFLAGS}" \
+		LINKFLAGS="${LDFLAGS}" \
+		LMP_INC="${LAMMPS_INCLUDEFLAGS}" \
+		MPI_INC=$(usex mpi '' "-I../STUBS") \
+		MPI_PATH=$(usex mpi '' '-L../STUBS') \
+		MPI_LIB=$(usex mpi '' '-lmpi_stubs') \
+		user-atc_SYSLIB="$(usex mpi "$($(tc-getPKG_CONFIG) --libs blas) $($(tc-getPKG_CONFIG) --libs lapack)" '')"\
+		"$@"
+}
+
+src_prepare() {
+	# Fix inconsistent use of SHFLAGS.
+	sed -i \
+		-e 's:voronoi_SYSINC\s\+=.*$:voronoi_SYSINC = -I/usr/include/voro++:' \
+		-e 's:voronoi_SYSPATH\s\+=.*$:voronoi_SYSPATH =:' \
+		lib/voronoi/Makefile.lammps || die
+
+	# Fix missing .so name.
+	sed -i \
+		-e 's:SHLIBFLAGS\s\+=\s\+:SHLIBFLAGS = -Wl,-soname,liblammps.so.0 :' \
+		src/MAKE/Makefile.serial || die
+
+	# Fix makefile in tools.
+	sed -i \
+		-e 's:g++:$(CXX) $(CXXFLAGS):' \
+		-e 's:gcc:$(CC) $(CCFLAGS):' \
+		-e 's:ifort:$(FC) $(FCFLAGS):' \
+		tools/Makefile || die
+}
+
+src_compile() {
+	# Prepare compiler flags.
+	append-cxxflags -fPIC -I../../src
+	append-fflags -fPIC
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src stubs
+
+	# Build packages
+	emake -C src yes-asphere
+	emake -C src yes-body
+	emake -C src yes-class2
+	emake -C src yes-colloid
+	emake -C src yes-dipole
+	emake -C src yes-fld
+	#emake -C src yes-gpu
+	emake -C src yes-granular
+	# Need OpenKIM external dependency.
+	#emake -C src yes-kim
+	# Need Kokkos external dependency.
+	#emake -C src yes-kokkos
+	emake -C src yes-kspace
+	emake -C src yes-manybody
+	emake -C src yes-mc
+	lmp_emake -C src yes-meam
+	lmp_emake -j1 -C lib/meam -f Makefile.gfortran
+	emake -C src yes-misc
+	emake -C src yes-molecule
+	#emake -C src yes-mpiio
+	emake -C src yes-opt
+	emake -C src yes-peri
+	emake -C src yes-poems
+	lmp_emake -C lib/poems -f Makefile.g++
+	emake -C src yes-reax
+	lmp_emake -j1 -C lib/reax -f Makefile.gfortran
+	emake -C src yes-replica
+	emake -C src yes-rigid
+	emake -C src yes-shock
+	emake -C src yes-snap
+	emake -C src yes-srd
+	emake -C src yes-voronoi
+	emake -C src yes-xtc
+
+	emake -C src yes-user-eff
+	emake -C src yes-user-fep
+	use mpi && emake -C src yes-user-lb
+	emake -C src yes-user-phonon
+	emake -C src yes-user-sph
+
+	if use mpi; then
+		emake -C src yes-user-atc
+		lmp_emake -C lib/atc -f Makefile.g++
+	fi
+
+	if use static-libs; then
+		# Build static library.
+		lmp_emake -C src makelib
+		lmp_emake -C src -f Makefile.lib serial
+	fi
+
+	# Build shared library.
+	lmp_emake -C src makeshlib
+	lmp_emake -C src -f Makefile.shlib serial
+
+	# Compile main executable.
+	lmp_emake -C src serial
+
+	# Compile tools.
+	emake -C tools binary2txt chain micelle2d data2xmovie
+}
+
+src_install() {
+	use static-libs && newlib.a src/liblammps_serial.a liblammps.a
+	newlib.so src/liblammps_serial.so liblammps.so.0.0.0
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so.0
+	newbin src/lmp_serial lmp
+	dobin tools/binary2txt
+	# Don't forget to add header files of optional packages as they are added
+	# to this ebuild. There may also be .mod files from Fortran based
+	# packages.
+	insinto "/usr/include/${PN}"
+	doins -r src/*.h lib/meam/*.mod
+
+	local LAMMPS_POTENTIALS="usr/share/${PN}/potentials"
+	insinto "/${LAMMPS_POTENTIALS}"
+	doins potentials/*
+	echo "LAMMPS_POTENTIALS=${EROOT}${LAMMPS_POTENTIALS}" > 99lammps
+	doenvd 99lammps
+
+	if use examples; then
+		local LAMMPS_EXAMPLES="/usr/share/${PN}/examples"
+		insinto "${LAMMPS_EXAMPLES}"
+		doins -r examples/*
+	fi
+
+	dodoc README
+	if use doc; then
+		dodoc doc/Manual.pdf
+		dohtml -r doc/*
+	fi
+}
diff --git a/sci-physics/lammps/lammps-20150416.ebuild b/sci-physics/lammps/lammps-20150416.ebuild
new file mode 100644
index 000000000000..020cfbdc4747
--- /dev/null
+++ b/sci-physics/lammps/lammps-20150416.ebuild
@@ -0,0 +1,267 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+PYTHON_COMPAT=( python{2_7,3_3} )
+
+inherit eutils flag-o-matic fortran-2 multilib python-r1
+
+convert_month() {
+	case $1 in
+		01) echo Jan
+			;;
+		02) echo Feb
+			;;
+		03) echo Mar
+			;;
+		04) echo Apr
+			;;
+		05) echo May
+			;;
+		06) echo Jun
+			;;
+		07) echo Jul
+			;;
+		08) echo Aug
+			;;
+		09) echo Sep
+			;;
+		10) echo Oct
+			;;
+		11) echo Nov
+			;;
+		12) echo Dec
+			;;
+		*)  echo unknown
+			;;
+	esac
+}
+
+MY_P=${PN}-$((10#${PV:6:2}))$(convert_month ${PV:4:2})${PV:2:2}
+
+DESCRIPTION="Large-scale Atomic/Molecular Massively Parallel Simulator"
+HOMEPAGE="http://lammps.sandia.gov/"
+SRC_URI="http://lammps.sandia.gov/tars/${MY_P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="doc examples gzip lammps-memalign mpi python static-libs"
+
+DEPEND="
+	mpi? (
+		virtual/blas
+		virtual/lapack
+		virtual/mpi
+	)
+	gzip? ( app-arch/gzip )
+	sci-libs/voro++
+	python? ( ${PYTHON_DEPS} )
+	"
+RDEPEND="${DEPEND}"
+
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+S="${WORKDIR}/${MY_P}"
+
+lmp_emake() {
+	local LAMMPS_INCLUDEFLAGS
+	LAMMPS_INCLUDEFLAGS="$(usex gzip '-DLAMMPS_GZIP' '')"
+	LAMMPS_INCLUDEFLAGS+="$(usex lammps-memalign ' -DLAMMPS_MEMALIGN' '')"
+
+	# The lammps makefile uses CC to indicate the C++ compiler.
+	emake \
+		ARCHIVE=$(tc-getAR) \
+		CC=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		F90=$(usex mpi "mpif90" "$(tc-getFC)") \
+		LINK=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		CCFLAGS="${CXXFLAGS}" \
+		F90FLAGS="${FCFLAGS}" \
+		LINKFLAGS="${LDFLAGS}" \
+		LMP_INC="${LAMMPS_INCLUDEFLAGS}" \
+		MPI_INC=$(usex mpi "" "-I../STUBS") \
+		MPI_PATH=$(usex mpi "" "-L../STUBS") \
+		MPI_LIB=$(usex mpi "" "-lmpi_stubs") \
+		user-atc_SYSLIB="$(usex mpi "$($(tc-getPKG_CONFIG) --libs blas) $($(tc-getPKG_CONFIG) --libs lapack)" '')"\
+		"$@"
+}
+
+lmp_activate_packages() {
+	# Build packages
+	lmp_emake -C src yes-asphere
+	lmp_emake -C src yes-body
+	lmp_emake -C src yes-class2
+	lmp_emake -C src yes-colloid
+	lmp_emake -C src yes-coreshell
+	lmp_emake -C src yes-dipole
+	lmp_emake -C src yes-fld
+	#lmp_emake -C src yes-gpu
+	lmp_emake -C src yes-granular
+	# Need OpenKIM external dependency.
+	#lmp_emake -C src yes-kim
+	# Need Kokkos external dependency.
+	#lmp_emake -C src yes-kokkos
+	lmp_emake -C src yes-kspace
+	lmp_emake -C src yes-manybody
+	lmp_emake -C src yes-mc
+	lmp_emake -C src yes-meam
+	lmp_emake -C src yes-misc
+	lmp_emake -C src yes-molecule
+	#lmp_emake -C src yes-mpiio
+	lmp_emake -C src yes-opt
+	lmp_emake -C src yes-peri
+	lmp_emake -C src yes-poems
+	lmp_emake -C src yes-qeq
+	lmp_emake -C src yes-reax
+	lmp_emake -C src yes-replica
+	lmp_emake -C src yes-rigid
+	lmp_emake -C src yes-shock
+	lmp_emake -C src yes-snap
+	lmp_emake -C src yes-srd
+	lmp_emake -C src yes-voronoi
+	lmp_emake -C src yes-xtc
+
+	if use mpi; then
+		lmp_emake -C src yes-user-atc
+	fi
+	lmp_emake -C src yes-user-eff
+	lmp_emake -C src yes-user-fep
+	use mpi && lmp_emake -C src yes-user-lb
+	lmp_emake -C src yes-user-phonon
+	lmp_emake -C src yes-user-sph
+}
+
+lmp_build_packages() {
+	lmp_emake -C lib/meam -j1 -f Makefile.gfortran
+	lmp_emake -C lib/poems -f Makefile.g++
+	lmp_emake -C lib/reax -j1 -f Makefile.gfortran
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++
+}
+
+lmp_clean_packages() {
+	lmp_emake -C lib/meam -f Makefile.gfortran clean
+	lmp_emake -C lib/poems -f Makefile.g++ clean
+	lmp_emake -C lib/reax -f Makefile.gfortran clean
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++ clean
+}
+
+src_prepare() {
+	# Fix inconsistent use of SHFLAGS.
+	sed -i \
+		-e 's:voronoi_SYSINC\s\+=.*$:voronoi_SYSINC = -I/usr/include/voro++:' \
+		-e 's:voronoi_SYSPATH\s\+=.*$:voronoi_SYSPATH =:' \
+		lib/voronoi/Makefile.lammps || die
+
+	# Fix missing .so name.
+	sed -i \
+		-e 's:SHLIBFLAGS\s\+=\s\+:SHLIBFLAGS = -Wl,-soname,liblammps.so.0 :' \
+		src/MAKE/Makefile.serial || die
+
+	# Fix makefile in tools.
+	sed -i \
+		-e 's:g++:$(CXX) $(CXXFLAGS):' \
+		-e 's:gcc:$(CC) $(CCFLAGS):' \
+		-e 's:ifort:$(FC) $(FCFLAGS):' \
+		tools/Makefile || die
+
+	# Patch python.
+	epatch "${FILESDIR}/lammps-python3.patch"
+	epatch "${FILESDIR}/python-shebang.patch"
+}
+
+src_compile() {
+	# Fix atc...
+	append-cxxflags -I../../src
+
+	# Acticate packages.
+	elog "Activating lammps packages..."
+	lmp_activate_packages
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	if use static-libs; then
+		# Build static library.
+		elog "Building static library..."
+		lmp_emake -C src mode=lib serial
+	fi
+
+	# Clean out packages (that's not done by the build system with the clean
+	# target), so we can rebuild the packages with -fPIC.
+	elog "Cleaning packages..."
+	lmp_clean_packages
+
+	# The build system does not rebuild the packages with -fPIC, adding flag
+	# manually.
+	append-cxxflags -fPIC
+	append-fflags -fPIC
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	# Build shared library.
+	elog "Building shared library..."
+	lmp_emake -C src mode=shlib serial
+
+	# Compile main executable. The shared library is always built, and
+	# mode=shexe is simply a way to re-use the object files built in the
+	# "shlib" step when linking the executable. The executable is not actually
+	# using the shared library. If we have built the static library, then we
+	# link that into the executable.
+	elog "Linking executable..."
+	if use static-libs; then
+		lmp_emake -C src mode=exe serial
+	else
+		lmp_emake -C src mode=shexe serial
+	fi
+
+	# Compile tools.
+	elog "Building tools..."
+	lmp_emake -C tools binary2txt chain data2xmovie micelle2d
+}
+
+src_install() {
+	use static-libs && newlib.a src/liblammps_serial.a liblammps.a
+	newlib.so src/liblammps_serial.so liblammps.so.0.0.0
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so.0
+	newbin src/lmp_serial lmp
+	dobin tools/binary2txt
+	dobin tools/chain
+	dobin tools/data2xmovie
+	dobin tools/micelle2d
+	# Don't forget to add header files of optional packages as they are added
+	# to this ebuild. There may also be .mod files from Fortran based
+	# packages.
+	insinto "/usr/include/${PN}"
+	doins -r src/*.h lib/meam/*.mod
+
+	local LAMMPS_POTENTIALS="usr/share/${PN}/potentials"
+	insinto "/${LAMMPS_POTENTIALS}"
+	doins potentials/*
+	echo "LAMMPS_POTENTIALS=${EROOT}${LAMMPS_POTENTIALS}" > 99lammps
+	doenvd 99lammps
+
+	# Install python script.
+	use python && python_foreach_impl python_domodule python/lammps.py
+
+	if use examples; then
+		local LAMMPS_EXAMPLES="/usr/share/${PN}/examples"
+		insinto "${LAMMPS_EXAMPLES}"
+		doins -r examples/*
+	fi
+
+	dodoc README
+	if use doc; then
+		dodoc doc/Manual.pdf
+		dohtml -r doc/*
+	fi
+}
diff --git a/sci-physics/lammps/lammps-20150418.ebuild b/sci-physics/lammps/lammps-20150418.ebuild
new file mode 100644
index 000000000000..020cfbdc4747
--- /dev/null
+++ b/sci-physics/lammps/lammps-20150418.ebuild
@@ -0,0 +1,267 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+PYTHON_COMPAT=( python{2_7,3_3} )
+
+inherit eutils flag-o-matic fortran-2 multilib python-r1
+
+convert_month() {
+	case $1 in
+		01) echo Jan
+			;;
+		02) echo Feb
+			;;
+		03) echo Mar
+			;;
+		04) echo Apr
+			;;
+		05) echo May
+			;;
+		06) echo Jun
+			;;
+		07) echo Jul
+			;;
+		08) echo Aug
+			;;
+		09) echo Sep
+			;;
+		10) echo Oct
+			;;
+		11) echo Nov
+			;;
+		12) echo Dec
+			;;
+		*)  echo unknown
+			;;
+	esac
+}
+
+MY_P=${PN}-$((10#${PV:6:2}))$(convert_month ${PV:4:2})${PV:2:2}
+
+DESCRIPTION="Large-scale Atomic/Molecular Massively Parallel Simulator"
+HOMEPAGE="http://lammps.sandia.gov/"
+SRC_URI="http://lammps.sandia.gov/tars/${MY_P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="doc examples gzip lammps-memalign mpi python static-libs"
+
+DEPEND="
+	mpi? (
+		virtual/blas
+		virtual/lapack
+		virtual/mpi
+	)
+	gzip? ( app-arch/gzip )
+	sci-libs/voro++
+	python? ( ${PYTHON_DEPS} )
+	"
+RDEPEND="${DEPEND}"
+
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+S="${WORKDIR}/${MY_P}"
+
+lmp_emake() {
+	local LAMMPS_INCLUDEFLAGS
+	LAMMPS_INCLUDEFLAGS="$(usex gzip '-DLAMMPS_GZIP' '')"
+	LAMMPS_INCLUDEFLAGS+="$(usex lammps-memalign ' -DLAMMPS_MEMALIGN' '')"
+
+	# The lammps makefile uses CC to indicate the C++ compiler.
+	emake \
+		ARCHIVE=$(tc-getAR) \
+		CC=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		F90=$(usex mpi "mpif90" "$(tc-getFC)") \
+		LINK=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		CCFLAGS="${CXXFLAGS}" \
+		F90FLAGS="${FCFLAGS}" \
+		LINKFLAGS="${LDFLAGS}" \
+		LMP_INC="${LAMMPS_INCLUDEFLAGS}" \
+		MPI_INC=$(usex mpi "" "-I../STUBS") \
+		MPI_PATH=$(usex mpi "" "-L../STUBS") \
+		MPI_LIB=$(usex mpi "" "-lmpi_stubs") \
+		user-atc_SYSLIB="$(usex mpi "$($(tc-getPKG_CONFIG) --libs blas) $($(tc-getPKG_CONFIG) --libs lapack)" '')"\
+		"$@"
+}
+
+lmp_activate_packages() {
+	# Build packages
+	lmp_emake -C src yes-asphere
+	lmp_emake -C src yes-body
+	lmp_emake -C src yes-class2
+	lmp_emake -C src yes-colloid
+	lmp_emake -C src yes-coreshell
+	lmp_emake -C src yes-dipole
+	lmp_emake -C src yes-fld
+	#lmp_emake -C src yes-gpu
+	lmp_emake -C src yes-granular
+	# Need OpenKIM external dependency.
+	#lmp_emake -C src yes-kim
+	# Need Kokkos external dependency.
+	#lmp_emake -C src yes-kokkos
+	lmp_emake -C src yes-kspace
+	lmp_emake -C src yes-manybody
+	lmp_emake -C src yes-mc
+	lmp_emake -C src yes-meam
+	lmp_emake -C src yes-misc
+	lmp_emake -C src yes-molecule
+	#lmp_emake -C src yes-mpiio
+	lmp_emake -C src yes-opt
+	lmp_emake -C src yes-peri
+	lmp_emake -C src yes-poems
+	lmp_emake -C src yes-qeq
+	lmp_emake -C src yes-reax
+	lmp_emake -C src yes-replica
+	lmp_emake -C src yes-rigid
+	lmp_emake -C src yes-shock
+	lmp_emake -C src yes-snap
+	lmp_emake -C src yes-srd
+	lmp_emake -C src yes-voronoi
+	lmp_emake -C src yes-xtc
+
+	if use mpi; then
+		lmp_emake -C src yes-user-atc
+	fi
+	lmp_emake -C src yes-user-eff
+	lmp_emake -C src yes-user-fep
+	use mpi && lmp_emake -C src yes-user-lb
+	lmp_emake -C src yes-user-phonon
+	lmp_emake -C src yes-user-sph
+}
+
+lmp_build_packages() {
+	lmp_emake -C lib/meam -j1 -f Makefile.gfortran
+	lmp_emake -C lib/poems -f Makefile.g++
+	lmp_emake -C lib/reax -j1 -f Makefile.gfortran
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++
+}
+
+lmp_clean_packages() {
+	lmp_emake -C lib/meam -f Makefile.gfortran clean
+	lmp_emake -C lib/poems -f Makefile.g++ clean
+	lmp_emake -C lib/reax -f Makefile.gfortran clean
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++ clean
+}
+
+src_prepare() {
+	# Fix inconsistent use of SHFLAGS.
+	sed -i \
+		-e 's:voronoi_SYSINC\s\+=.*$:voronoi_SYSINC = -I/usr/include/voro++:' \
+		-e 's:voronoi_SYSPATH\s\+=.*$:voronoi_SYSPATH =:' \
+		lib/voronoi/Makefile.lammps || die
+
+	# Fix missing .so name.
+	sed -i \
+		-e 's:SHLIBFLAGS\s\+=\s\+:SHLIBFLAGS = -Wl,-soname,liblammps.so.0 :' \
+		src/MAKE/Makefile.serial || die
+
+	# Fix makefile in tools.
+	sed -i \
+		-e 's:g++:$(CXX) $(CXXFLAGS):' \
+		-e 's:gcc:$(CC) $(CCFLAGS):' \
+		-e 's:ifort:$(FC) $(FCFLAGS):' \
+		tools/Makefile || die
+
+	# Patch python.
+	epatch "${FILESDIR}/lammps-python3.patch"
+	epatch "${FILESDIR}/python-shebang.patch"
+}
+
+src_compile() {
+	# Fix atc...
+	append-cxxflags -I../../src
+
+	# Acticate packages.
+	elog "Activating lammps packages..."
+	lmp_activate_packages
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	if use static-libs; then
+		# Build static library.
+		elog "Building static library..."
+		lmp_emake -C src mode=lib serial
+	fi
+
+	# Clean out packages (that's not done by the build system with the clean
+	# target), so we can rebuild the packages with -fPIC.
+	elog "Cleaning packages..."
+	lmp_clean_packages
+
+	# The build system does not rebuild the packages with -fPIC, adding flag
+	# manually.
+	append-cxxflags -fPIC
+	append-fflags -fPIC
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	# Build shared library.
+	elog "Building shared library..."
+	lmp_emake -C src mode=shlib serial
+
+	# Compile main executable. The shared library is always built, and
+	# mode=shexe is simply a way to re-use the object files built in the
+	# "shlib" step when linking the executable. The executable is not actually
+	# using the shared library. If we have built the static library, then we
+	# link that into the executable.
+	elog "Linking executable..."
+	if use static-libs; then
+		lmp_emake -C src mode=exe serial
+	else
+		lmp_emake -C src mode=shexe serial
+	fi
+
+	# Compile tools.
+	elog "Building tools..."
+	lmp_emake -C tools binary2txt chain data2xmovie micelle2d
+}
+
+src_install() {
+	use static-libs && newlib.a src/liblammps_serial.a liblammps.a
+	newlib.so src/liblammps_serial.so liblammps.so.0.0.0
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so.0
+	newbin src/lmp_serial lmp
+	dobin tools/binary2txt
+	dobin tools/chain
+	dobin tools/data2xmovie
+	dobin tools/micelle2d
+	# Don't forget to add header files of optional packages as they are added
+	# to this ebuild. There may also be .mod files from Fortran based
+	# packages.
+	insinto "/usr/include/${PN}"
+	doins -r src/*.h lib/meam/*.mod
+
+	local LAMMPS_POTENTIALS="usr/share/${PN}/potentials"
+	insinto "/${LAMMPS_POTENTIALS}"
+	doins potentials/*
+	echo "LAMMPS_POTENTIALS=${EROOT}${LAMMPS_POTENTIALS}" > 99lammps
+	doenvd 99lammps
+
+	# Install python script.
+	use python && python_foreach_impl python_domodule python/lammps.py
+
+	if use examples; then
+		local LAMMPS_EXAMPLES="/usr/share/${PN}/examples"
+		insinto "${LAMMPS_EXAMPLES}"
+		doins -r examples/*
+	fi
+
+	dodoc README
+	if use doc; then
+		dodoc doc/Manual.pdf
+		dohtml -r doc/*
+	fi
+}
diff --git a/sci-physics/lammps/lammps-20150428.ebuild b/sci-physics/lammps/lammps-20150428.ebuild
new file mode 100644
index 000000000000..020cfbdc4747
--- /dev/null
+++ b/sci-physics/lammps/lammps-20150428.ebuild
@@ -0,0 +1,267 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+PYTHON_COMPAT=( python{2_7,3_3} )
+
+inherit eutils flag-o-matic fortran-2 multilib python-r1
+
+convert_month() {
+	case $1 in
+		01) echo Jan
+			;;
+		02) echo Feb
+			;;
+		03) echo Mar
+			;;
+		04) echo Apr
+			;;
+		05) echo May
+			;;
+		06) echo Jun
+			;;
+		07) echo Jul
+			;;
+		08) echo Aug
+			;;
+		09) echo Sep
+			;;
+		10) echo Oct
+			;;
+		11) echo Nov
+			;;
+		12) echo Dec
+			;;
+		*)  echo unknown
+			;;
+	esac
+}
+
+MY_P=${PN}-$((10#${PV:6:2}))$(convert_month ${PV:4:2})${PV:2:2}
+
+DESCRIPTION="Large-scale Atomic/Molecular Massively Parallel Simulator"
+HOMEPAGE="http://lammps.sandia.gov/"
+SRC_URI="http://lammps.sandia.gov/tars/${MY_P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="doc examples gzip lammps-memalign mpi python static-libs"
+
+DEPEND="
+	mpi? (
+		virtual/blas
+		virtual/lapack
+		virtual/mpi
+	)
+	gzip? ( app-arch/gzip )
+	sci-libs/voro++
+	python? ( ${PYTHON_DEPS} )
+	"
+RDEPEND="${DEPEND}"
+
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+S="${WORKDIR}/${MY_P}"
+
+lmp_emake() {
+	local LAMMPS_INCLUDEFLAGS
+	LAMMPS_INCLUDEFLAGS="$(usex gzip '-DLAMMPS_GZIP' '')"
+	LAMMPS_INCLUDEFLAGS+="$(usex lammps-memalign ' -DLAMMPS_MEMALIGN' '')"
+
+	# The lammps makefile uses CC to indicate the C++ compiler.
+	emake \
+		ARCHIVE=$(tc-getAR) \
+		CC=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		F90=$(usex mpi "mpif90" "$(tc-getFC)") \
+		LINK=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		CCFLAGS="${CXXFLAGS}" \
+		F90FLAGS="${FCFLAGS}" \
+		LINKFLAGS="${LDFLAGS}" \
+		LMP_INC="${LAMMPS_INCLUDEFLAGS}" \
+		MPI_INC=$(usex mpi "" "-I../STUBS") \
+		MPI_PATH=$(usex mpi "" "-L../STUBS") \
+		MPI_LIB=$(usex mpi "" "-lmpi_stubs") \
+		user-atc_SYSLIB="$(usex mpi "$($(tc-getPKG_CONFIG) --libs blas) $($(tc-getPKG_CONFIG) --libs lapack)" '')"\
+		"$@"
+}
+
+lmp_activate_packages() {
+	# Build packages
+	lmp_emake -C src yes-asphere
+	lmp_emake -C src yes-body
+	lmp_emake -C src yes-class2
+	lmp_emake -C src yes-colloid
+	lmp_emake -C src yes-coreshell
+	lmp_emake -C src yes-dipole
+	lmp_emake -C src yes-fld
+	#lmp_emake -C src yes-gpu
+	lmp_emake -C src yes-granular
+	# Need OpenKIM external dependency.
+	#lmp_emake -C src yes-kim
+	# Need Kokkos external dependency.
+	#lmp_emake -C src yes-kokkos
+	lmp_emake -C src yes-kspace
+	lmp_emake -C src yes-manybody
+	lmp_emake -C src yes-mc
+	lmp_emake -C src yes-meam
+	lmp_emake -C src yes-misc
+	lmp_emake -C src yes-molecule
+	#lmp_emake -C src yes-mpiio
+	lmp_emake -C src yes-opt
+	lmp_emake -C src yes-peri
+	lmp_emake -C src yes-poems
+	lmp_emake -C src yes-qeq
+	lmp_emake -C src yes-reax
+	lmp_emake -C src yes-replica
+	lmp_emake -C src yes-rigid
+	lmp_emake -C src yes-shock
+	lmp_emake -C src yes-snap
+	lmp_emake -C src yes-srd
+	lmp_emake -C src yes-voronoi
+	lmp_emake -C src yes-xtc
+
+	if use mpi; then
+		lmp_emake -C src yes-user-atc
+	fi
+	lmp_emake -C src yes-user-eff
+	lmp_emake -C src yes-user-fep
+	use mpi && lmp_emake -C src yes-user-lb
+	lmp_emake -C src yes-user-phonon
+	lmp_emake -C src yes-user-sph
+}
+
+lmp_build_packages() {
+	lmp_emake -C lib/meam -j1 -f Makefile.gfortran
+	lmp_emake -C lib/poems -f Makefile.g++
+	lmp_emake -C lib/reax -j1 -f Makefile.gfortran
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++
+}
+
+lmp_clean_packages() {
+	lmp_emake -C lib/meam -f Makefile.gfortran clean
+	lmp_emake -C lib/poems -f Makefile.g++ clean
+	lmp_emake -C lib/reax -f Makefile.gfortran clean
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++ clean
+}
+
+src_prepare() {
+	# Fix inconsistent use of SHFLAGS.
+	sed -i \
+		-e 's:voronoi_SYSINC\s\+=.*$:voronoi_SYSINC = -I/usr/include/voro++:' \
+		-e 's:voronoi_SYSPATH\s\+=.*$:voronoi_SYSPATH =:' \
+		lib/voronoi/Makefile.lammps || die
+
+	# Fix missing .so name.
+	sed -i \
+		-e 's:SHLIBFLAGS\s\+=\s\+:SHLIBFLAGS = -Wl,-soname,liblammps.so.0 :' \
+		src/MAKE/Makefile.serial || die
+
+	# Fix makefile in tools.
+	sed -i \
+		-e 's:g++:$(CXX) $(CXXFLAGS):' \
+		-e 's:gcc:$(CC) $(CCFLAGS):' \
+		-e 's:ifort:$(FC) $(FCFLAGS):' \
+		tools/Makefile || die
+
+	# Patch python.
+	epatch "${FILESDIR}/lammps-python3.patch"
+	epatch "${FILESDIR}/python-shebang.patch"
+}
+
+src_compile() {
+	# Fix atc...
+	append-cxxflags -I../../src
+
+	# Acticate packages.
+	elog "Activating lammps packages..."
+	lmp_activate_packages
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	if use static-libs; then
+		# Build static library.
+		elog "Building static library..."
+		lmp_emake -C src mode=lib serial
+	fi
+
+	# Clean out packages (that's not done by the build system with the clean
+	# target), so we can rebuild the packages with -fPIC.
+	elog "Cleaning packages..."
+	lmp_clean_packages
+
+	# The build system does not rebuild the packages with -fPIC, adding flag
+	# manually.
+	append-cxxflags -fPIC
+	append-fflags -fPIC
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	# Build shared library.
+	elog "Building shared library..."
+	lmp_emake -C src mode=shlib serial
+
+	# Compile main executable. The shared library is always built, and
+	# mode=shexe is simply a way to re-use the object files built in the
+	# "shlib" step when linking the executable. The executable is not actually
+	# using the shared library. If we have built the static library, then we
+	# link that into the executable.
+	elog "Linking executable..."
+	if use static-libs; then
+		lmp_emake -C src mode=exe serial
+	else
+		lmp_emake -C src mode=shexe serial
+	fi
+
+	# Compile tools.
+	elog "Building tools..."
+	lmp_emake -C tools binary2txt chain data2xmovie micelle2d
+}
+
+src_install() {
+	use static-libs && newlib.a src/liblammps_serial.a liblammps.a
+	newlib.so src/liblammps_serial.so liblammps.so.0.0.0
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so.0
+	newbin src/lmp_serial lmp
+	dobin tools/binary2txt
+	dobin tools/chain
+	dobin tools/data2xmovie
+	dobin tools/micelle2d
+	# Don't forget to add header files of optional packages as they are added
+	# to this ebuild. There may also be .mod files from Fortran based
+	# packages.
+	insinto "/usr/include/${PN}"
+	doins -r src/*.h lib/meam/*.mod
+
+	local LAMMPS_POTENTIALS="usr/share/${PN}/potentials"
+	insinto "/${LAMMPS_POTENTIALS}"
+	doins potentials/*
+	echo "LAMMPS_POTENTIALS=${EROOT}${LAMMPS_POTENTIALS}" > 99lammps
+	doenvd 99lammps
+
+	# Install python script.
+	use python && python_foreach_impl python_domodule python/lammps.py
+
+	if use examples; then
+		local LAMMPS_EXAMPLES="/usr/share/${PN}/examples"
+		insinto "${LAMMPS_EXAMPLES}"
+		doins -r examples/*
+	fi
+
+	dodoc README
+	if use doc; then
+		dodoc doc/Manual.pdf
+		dohtml -r doc/*
+	fi
+}
diff --git a/sci-physics/lammps/lammps-20150430.ebuild b/sci-physics/lammps/lammps-20150430.ebuild
new file mode 100644
index 000000000000..020cfbdc4747
--- /dev/null
+++ b/sci-physics/lammps/lammps-20150430.ebuild
@@ -0,0 +1,267 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+PYTHON_COMPAT=( python{2_7,3_3} )
+
+inherit eutils flag-o-matic fortran-2 multilib python-r1
+
+convert_month() {
+	case $1 in
+		01) echo Jan
+			;;
+		02) echo Feb
+			;;
+		03) echo Mar
+			;;
+		04) echo Apr
+			;;
+		05) echo May
+			;;
+		06) echo Jun
+			;;
+		07) echo Jul
+			;;
+		08) echo Aug
+			;;
+		09) echo Sep
+			;;
+		10) echo Oct
+			;;
+		11) echo Nov
+			;;
+		12) echo Dec
+			;;
+		*)  echo unknown
+			;;
+	esac
+}
+
+MY_P=${PN}-$((10#${PV:6:2}))$(convert_month ${PV:4:2})${PV:2:2}
+
+DESCRIPTION="Large-scale Atomic/Molecular Massively Parallel Simulator"
+HOMEPAGE="http://lammps.sandia.gov/"
+SRC_URI="http://lammps.sandia.gov/tars/${MY_P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="doc examples gzip lammps-memalign mpi python static-libs"
+
+DEPEND="
+	mpi? (
+		virtual/blas
+		virtual/lapack
+		virtual/mpi
+	)
+	gzip? ( app-arch/gzip )
+	sci-libs/voro++
+	python? ( ${PYTHON_DEPS} )
+	"
+RDEPEND="${DEPEND}"
+
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+S="${WORKDIR}/${MY_P}"
+
+lmp_emake() {
+	local LAMMPS_INCLUDEFLAGS
+	LAMMPS_INCLUDEFLAGS="$(usex gzip '-DLAMMPS_GZIP' '')"
+	LAMMPS_INCLUDEFLAGS+="$(usex lammps-memalign ' -DLAMMPS_MEMALIGN' '')"
+
+	# The lammps makefile uses CC to indicate the C++ compiler.
+	emake \
+		ARCHIVE=$(tc-getAR) \
+		CC=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		F90=$(usex mpi "mpif90" "$(tc-getFC)") \
+		LINK=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		CCFLAGS="${CXXFLAGS}" \
+		F90FLAGS="${FCFLAGS}" \
+		LINKFLAGS="${LDFLAGS}" \
+		LMP_INC="${LAMMPS_INCLUDEFLAGS}" \
+		MPI_INC=$(usex mpi "" "-I../STUBS") \
+		MPI_PATH=$(usex mpi "" "-L../STUBS") \
+		MPI_LIB=$(usex mpi "" "-lmpi_stubs") \
+		user-atc_SYSLIB="$(usex mpi "$($(tc-getPKG_CONFIG) --libs blas) $($(tc-getPKG_CONFIG) --libs lapack)" '')"\
+		"$@"
+}
+
+lmp_activate_packages() {
+	# Build packages
+	lmp_emake -C src yes-asphere
+	lmp_emake -C src yes-body
+	lmp_emake -C src yes-class2
+	lmp_emake -C src yes-colloid
+	lmp_emake -C src yes-coreshell
+	lmp_emake -C src yes-dipole
+	lmp_emake -C src yes-fld
+	#lmp_emake -C src yes-gpu
+	lmp_emake -C src yes-granular
+	# Need OpenKIM external dependency.
+	#lmp_emake -C src yes-kim
+	# Need Kokkos external dependency.
+	#lmp_emake -C src yes-kokkos
+	lmp_emake -C src yes-kspace
+	lmp_emake -C src yes-manybody
+	lmp_emake -C src yes-mc
+	lmp_emake -C src yes-meam
+	lmp_emake -C src yes-misc
+	lmp_emake -C src yes-molecule
+	#lmp_emake -C src yes-mpiio
+	lmp_emake -C src yes-opt
+	lmp_emake -C src yes-peri
+	lmp_emake -C src yes-poems
+	lmp_emake -C src yes-qeq
+	lmp_emake -C src yes-reax
+	lmp_emake -C src yes-replica
+	lmp_emake -C src yes-rigid
+	lmp_emake -C src yes-shock
+	lmp_emake -C src yes-snap
+	lmp_emake -C src yes-srd
+	lmp_emake -C src yes-voronoi
+	lmp_emake -C src yes-xtc
+
+	if use mpi; then
+		lmp_emake -C src yes-user-atc
+	fi
+	lmp_emake -C src yes-user-eff
+	lmp_emake -C src yes-user-fep
+	use mpi && lmp_emake -C src yes-user-lb
+	lmp_emake -C src yes-user-phonon
+	lmp_emake -C src yes-user-sph
+}
+
+lmp_build_packages() {
+	lmp_emake -C lib/meam -j1 -f Makefile.gfortran
+	lmp_emake -C lib/poems -f Makefile.g++
+	lmp_emake -C lib/reax -j1 -f Makefile.gfortran
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++
+}
+
+lmp_clean_packages() {
+	lmp_emake -C lib/meam -f Makefile.gfortran clean
+	lmp_emake -C lib/poems -f Makefile.g++ clean
+	lmp_emake -C lib/reax -f Makefile.gfortran clean
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++ clean
+}
+
+src_prepare() {
+	# Fix inconsistent use of SHFLAGS.
+	sed -i \
+		-e 's:voronoi_SYSINC\s\+=.*$:voronoi_SYSINC = -I/usr/include/voro++:' \
+		-e 's:voronoi_SYSPATH\s\+=.*$:voronoi_SYSPATH =:' \
+		lib/voronoi/Makefile.lammps || die
+
+	# Fix missing .so name.
+	sed -i \
+		-e 's:SHLIBFLAGS\s\+=\s\+:SHLIBFLAGS = -Wl,-soname,liblammps.so.0 :' \
+		src/MAKE/Makefile.serial || die
+
+	# Fix makefile in tools.
+	sed -i \
+		-e 's:g++:$(CXX) $(CXXFLAGS):' \
+		-e 's:gcc:$(CC) $(CCFLAGS):' \
+		-e 's:ifort:$(FC) $(FCFLAGS):' \
+		tools/Makefile || die
+
+	# Patch python.
+	epatch "${FILESDIR}/lammps-python3.patch"
+	epatch "${FILESDIR}/python-shebang.patch"
+}
+
+src_compile() {
+	# Fix atc...
+	append-cxxflags -I../../src
+
+	# Acticate packages.
+	elog "Activating lammps packages..."
+	lmp_activate_packages
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	if use static-libs; then
+		# Build static library.
+		elog "Building static library..."
+		lmp_emake -C src mode=lib serial
+	fi
+
+	# Clean out packages (that's not done by the build system with the clean
+	# target), so we can rebuild the packages with -fPIC.
+	elog "Cleaning packages..."
+	lmp_clean_packages
+
+	# The build system does not rebuild the packages with -fPIC, adding flag
+	# manually.
+	append-cxxflags -fPIC
+	append-fflags -fPIC
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	# Build shared library.
+	elog "Building shared library..."
+	lmp_emake -C src mode=shlib serial
+
+	# Compile main executable. The shared library is always built, and
+	# mode=shexe is simply a way to re-use the object files built in the
+	# "shlib" step when linking the executable. The executable is not actually
+	# using the shared library. If we have built the static library, then we
+	# link that into the executable.
+	elog "Linking executable..."
+	if use static-libs; then
+		lmp_emake -C src mode=exe serial
+	else
+		lmp_emake -C src mode=shexe serial
+	fi
+
+	# Compile tools.
+	elog "Building tools..."
+	lmp_emake -C tools binary2txt chain data2xmovie micelle2d
+}
+
+src_install() {
+	use static-libs && newlib.a src/liblammps_serial.a liblammps.a
+	newlib.so src/liblammps_serial.so liblammps.so.0.0.0
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so.0
+	newbin src/lmp_serial lmp
+	dobin tools/binary2txt
+	dobin tools/chain
+	dobin tools/data2xmovie
+	dobin tools/micelle2d
+	# Don't forget to add header files of optional packages as they are added
+	# to this ebuild. There may also be .mod files from Fortran based
+	# packages.
+	insinto "/usr/include/${PN}"
+	doins -r src/*.h lib/meam/*.mod
+
+	local LAMMPS_POTENTIALS="usr/share/${PN}/potentials"
+	insinto "/${LAMMPS_POTENTIALS}"
+	doins potentials/*
+	echo "LAMMPS_POTENTIALS=${EROOT}${LAMMPS_POTENTIALS}" > 99lammps
+	doenvd 99lammps
+
+	# Install python script.
+	use python && python_foreach_impl python_domodule python/lammps.py
+
+	if use examples; then
+		local LAMMPS_EXAMPLES="/usr/share/${PN}/examples"
+		insinto "${LAMMPS_EXAMPLES}"
+		doins -r examples/*
+	fi
+
+	dodoc README
+	if use doc; then
+		dodoc doc/Manual.pdf
+		dohtml -r doc/*
+	fi
+}
diff --git a/sci-physics/lammps/lammps-20150515.ebuild b/sci-physics/lammps/lammps-20150515.ebuild
new file mode 100644
index 000000000000..6869d36b96a1
--- /dev/null
+++ b/sci-physics/lammps/lammps-20150515.ebuild
@@ -0,0 +1,267 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+PYTHON_COMPAT=( python{2_7,3_3} )
+
+inherit eutils flag-o-matic fortran-2 multilib python-r1
+
+convert_month() {
+	case $1 in
+		01) echo Jan
+			;;
+		02) echo Feb
+			;;
+		03) echo Mar
+			;;
+		04) echo Apr
+			;;
+		05) echo May
+			;;
+		06) echo Jun
+			;;
+		07) echo Jul
+			;;
+		08) echo Aug
+			;;
+		09) echo Sep
+			;;
+		10) echo Oct
+			;;
+		11) echo Nov
+			;;
+		12) echo Dec
+			;;
+		*)  echo unknown
+			;;
+	esac
+}
+
+MY_P=${PN}-$((10#${PV:6:2}))$(convert_month ${PV:4:2})${PV:2:2}
+
+DESCRIPTION="Large-scale Atomic/Molecular Massively Parallel Simulator"
+HOMEPAGE="http://lammps.sandia.gov/"
+SRC_URI="http://lammps.sandia.gov/tars/${MY_P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="amd64 x86"
+IUSE="doc examples gzip lammps-memalign mpi python static-libs"
+
+DEPEND="
+	mpi? (
+		virtual/blas
+		virtual/lapack
+		virtual/mpi
+	)
+	gzip? ( app-arch/gzip )
+	sci-libs/voro++
+	python? ( ${PYTHON_DEPS} )
+	"
+RDEPEND="${DEPEND}"
+
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+S="${WORKDIR}/${MY_P}"
+
+lmp_emake() {
+	local LAMMPS_INCLUDEFLAGS
+	LAMMPS_INCLUDEFLAGS="$(usex gzip '-DLAMMPS_GZIP' '')"
+	LAMMPS_INCLUDEFLAGS+="$(usex lammps-memalign ' -DLAMMPS_MEMALIGN' '')"
+
+	# The lammps makefile uses CC to indicate the C++ compiler.
+	emake \
+		ARCHIVE=$(tc-getAR) \
+		CC=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		F90=$(usex mpi "mpif90" "$(tc-getFC)") \
+		LINK=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		CCFLAGS="${CXXFLAGS}" \
+		F90FLAGS="${FCFLAGS}" \
+		LINKFLAGS="${LDFLAGS}" \
+		LMP_INC="${LAMMPS_INCLUDEFLAGS}" \
+		MPI_INC=$(usex mpi "" "-I../STUBS") \
+		MPI_PATH=$(usex mpi "" "-L../STUBS") \
+		MPI_LIB=$(usex mpi "" "-lmpi_stubs") \
+		user-atc_SYSLIB="$(usex mpi "$($(tc-getPKG_CONFIG) --libs blas) $($(tc-getPKG_CONFIG) --libs lapack)" '')"\
+		"$@"
+}
+
+lmp_activate_packages() {
+	# Build packages
+	lmp_emake -C src yes-asphere
+	lmp_emake -C src yes-body
+	lmp_emake -C src yes-class2
+	lmp_emake -C src yes-colloid
+	lmp_emake -C src yes-coreshell
+	lmp_emake -C src yes-dipole
+	lmp_emake -C src yes-fld
+	#lmp_emake -C src yes-gpu
+	lmp_emake -C src yes-granular
+	# Need OpenKIM external dependency.
+	#lmp_emake -C src yes-kim
+	# Need Kokkos external dependency.
+	#lmp_emake -C src yes-kokkos
+	lmp_emake -C src yes-kspace
+	lmp_emake -C src yes-manybody
+	lmp_emake -C src yes-mc
+	lmp_emake -C src yes-meam
+	lmp_emake -C src yes-misc
+	lmp_emake -C src yes-molecule
+	#lmp_emake -C src yes-mpiio
+	lmp_emake -C src yes-opt
+	lmp_emake -C src yes-peri
+	lmp_emake -C src yes-poems
+	lmp_emake -C src yes-qeq
+	lmp_emake -C src yes-reax
+	lmp_emake -C src yes-replica
+	lmp_emake -C src yes-rigid
+	lmp_emake -C src yes-shock
+	lmp_emake -C src yes-snap
+	lmp_emake -C src yes-srd
+	lmp_emake -C src yes-voronoi
+	lmp_emake -C src yes-xtc
+
+	if use mpi; then
+		lmp_emake -C src yes-user-atc
+	fi
+	lmp_emake -C src yes-user-eff
+	lmp_emake -C src yes-user-fep
+	use mpi && lmp_emake -C src yes-user-lb
+	lmp_emake -C src yes-user-phonon
+	lmp_emake -C src yes-user-sph
+}
+
+lmp_build_packages() {
+	lmp_emake -C lib/meam -j1 -f Makefile.gfortran
+	lmp_emake -C lib/poems -f Makefile.g++
+	lmp_emake -C lib/reax -j1 -f Makefile.gfortran
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++
+}
+
+lmp_clean_packages() {
+	lmp_emake -C lib/meam -f Makefile.gfortran clean
+	lmp_emake -C lib/poems -f Makefile.g++ clean
+	lmp_emake -C lib/reax -f Makefile.gfortran clean
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++ clean
+}
+
+src_prepare() {
+	# Fix inconsistent use of SHFLAGS.
+	sed -i \
+		-e 's:voronoi_SYSINC\s\+=.*$:voronoi_SYSINC = -I/usr/include/voro++:' \
+		-e 's:voronoi_SYSPATH\s\+=.*$:voronoi_SYSPATH =:' \
+		lib/voronoi/Makefile.lammps || die
+
+	# Fix missing .so name.
+	sed -i \
+		-e 's:SHLIBFLAGS\s\+=\s\+:SHLIBFLAGS = -Wl,-soname,liblammps.so.0 :' \
+		src/MAKE/Makefile.serial || die
+
+	# Fix makefile in tools.
+	sed -i \
+		-e 's:g++:$(CXX) $(CXXFLAGS):' \
+		-e 's:gcc:$(CC) $(CCFLAGS):' \
+		-e 's:ifort:$(FC) $(FCFLAGS):' \
+		tools/Makefile || die
+
+	# Patch python.
+	epatch "${FILESDIR}/lammps-python3.patch"
+	epatch "${FILESDIR}/python-shebang.patch"
+}
+
+src_compile() {
+	# Fix atc...
+	append-cxxflags -I../../src
+
+	# Acticate packages.
+	elog "Activating lammps packages..."
+	lmp_activate_packages
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	if use static-libs; then
+		# Build static library.
+		elog "Building static library..."
+		lmp_emake -C src mode=lib serial
+	fi
+
+	# Clean out packages (that's not done by the build system with the clean
+	# target), so we can rebuild the packages with -fPIC.
+	elog "Cleaning packages..."
+	lmp_clean_packages
+
+	# The build system does not rebuild the packages with -fPIC, adding flag
+	# manually.
+	append-cxxflags -fPIC
+	append-fflags -fPIC
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	# Build shared library.
+	elog "Building shared library..."
+	lmp_emake -C src mode=shlib serial
+
+	# Compile main executable. The shared library is always built, and
+	# mode=shexe is simply a way to re-use the object files built in the
+	# "shlib" step when linking the executable. The executable is not actually
+	# using the shared library. If we have built the static library, then we
+	# link that into the executable.
+	elog "Linking executable..."
+	if use static-libs; then
+		lmp_emake -C src mode=exe serial
+	else
+		lmp_emake -C src mode=shexe serial
+	fi
+
+	# Compile tools.
+	elog "Building tools..."
+	lmp_emake -C tools binary2txt chain data2xmovie micelle2d
+}
+
+src_install() {
+	use static-libs && newlib.a src/liblammps_serial.a liblammps.a
+	newlib.so src/liblammps_serial.so liblammps.so.0.0.0
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so.0
+	newbin src/lmp_serial lmp
+	dobin tools/binary2txt
+	dobin tools/chain
+	dobin tools/data2xmovie
+	dobin tools/micelle2d
+	# Don't forget to add header files of optional packages as they are added
+	# to this ebuild. There may also be .mod files from Fortran based
+	# packages.
+	insinto "/usr/include/${PN}"
+	doins -r src/*.h lib/meam/*.mod
+
+	local LAMMPS_POTENTIALS="usr/share/${PN}/potentials"
+	insinto "/${LAMMPS_POTENTIALS}"
+	doins potentials/*
+	echo "LAMMPS_POTENTIALS=${EROOT}${LAMMPS_POTENTIALS}" > 99lammps
+	doenvd 99lammps
+
+	# Install python script.
+	use python && python_foreach_impl python_domodule python/lammps.py
+
+	if use examples; then
+		local LAMMPS_EXAMPLES="/usr/share/${PN}/examples"
+		insinto "${LAMMPS_EXAMPLES}"
+		doins -r examples/*
+	fi
+
+	dodoc README
+	if use doc; then
+		dodoc doc/Manual.pdf
+		dohtml -r doc/*
+	fi
+}
diff --git a/sci-physics/lammps/lammps-20150718.ebuild b/sci-physics/lammps/lammps-20150718.ebuild
new file mode 100644
index 000000000000..020cfbdc4747
--- /dev/null
+++ b/sci-physics/lammps/lammps-20150718.ebuild
@@ -0,0 +1,267 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+PYTHON_COMPAT=( python{2_7,3_3} )
+
+inherit eutils flag-o-matic fortran-2 multilib python-r1
+
+convert_month() {
+	case $1 in
+		01) echo Jan
+			;;
+		02) echo Feb
+			;;
+		03) echo Mar
+			;;
+		04) echo Apr
+			;;
+		05) echo May
+			;;
+		06) echo Jun
+			;;
+		07) echo Jul
+			;;
+		08) echo Aug
+			;;
+		09) echo Sep
+			;;
+		10) echo Oct
+			;;
+		11) echo Nov
+			;;
+		12) echo Dec
+			;;
+		*)  echo unknown
+			;;
+	esac
+}
+
+MY_P=${PN}-$((10#${PV:6:2}))$(convert_month ${PV:4:2})${PV:2:2}
+
+DESCRIPTION="Large-scale Atomic/Molecular Massively Parallel Simulator"
+HOMEPAGE="http://lammps.sandia.gov/"
+SRC_URI="http://lammps.sandia.gov/tars/${MY_P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="doc examples gzip lammps-memalign mpi python static-libs"
+
+DEPEND="
+	mpi? (
+		virtual/blas
+		virtual/lapack
+		virtual/mpi
+	)
+	gzip? ( app-arch/gzip )
+	sci-libs/voro++
+	python? ( ${PYTHON_DEPS} )
+	"
+RDEPEND="${DEPEND}"
+
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+S="${WORKDIR}/${MY_P}"
+
+lmp_emake() {
+	local LAMMPS_INCLUDEFLAGS
+	LAMMPS_INCLUDEFLAGS="$(usex gzip '-DLAMMPS_GZIP' '')"
+	LAMMPS_INCLUDEFLAGS+="$(usex lammps-memalign ' -DLAMMPS_MEMALIGN' '')"
+
+	# The lammps makefile uses CC to indicate the C++ compiler.
+	emake \
+		ARCHIVE=$(tc-getAR) \
+		CC=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		F90=$(usex mpi "mpif90" "$(tc-getFC)") \
+		LINK=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		CCFLAGS="${CXXFLAGS}" \
+		F90FLAGS="${FCFLAGS}" \
+		LINKFLAGS="${LDFLAGS}" \
+		LMP_INC="${LAMMPS_INCLUDEFLAGS}" \
+		MPI_INC=$(usex mpi "" "-I../STUBS") \
+		MPI_PATH=$(usex mpi "" "-L../STUBS") \
+		MPI_LIB=$(usex mpi "" "-lmpi_stubs") \
+		user-atc_SYSLIB="$(usex mpi "$($(tc-getPKG_CONFIG) --libs blas) $($(tc-getPKG_CONFIG) --libs lapack)" '')"\
+		"$@"
+}
+
+lmp_activate_packages() {
+	# Build packages
+	lmp_emake -C src yes-asphere
+	lmp_emake -C src yes-body
+	lmp_emake -C src yes-class2
+	lmp_emake -C src yes-colloid
+	lmp_emake -C src yes-coreshell
+	lmp_emake -C src yes-dipole
+	lmp_emake -C src yes-fld
+	#lmp_emake -C src yes-gpu
+	lmp_emake -C src yes-granular
+	# Need OpenKIM external dependency.
+	#lmp_emake -C src yes-kim
+	# Need Kokkos external dependency.
+	#lmp_emake -C src yes-kokkos
+	lmp_emake -C src yes-kspace
+	lmp_emake -C src yes-manybody
+	lmp_emake -C src yes-mc
+	lmp_emake -C src yes-meam
+	lmp_emake -C src yes-misc
+	lmp_emake -C src yes-molecule
+	#lmp_emake -C src yes-mpiio
+	lmp_emake -C src yes-opt
+	lmp_emake -C src yes-peri
+	lmp_emake -C src yes-poems
+	lmp_emake -C src yes-qeq
+	lmp_emake -C src yes-reax
+	lmp_emake -C src yes-replica
+	lmp_emake -C src yes-rigid
+	lmp_emake -C src yes-shock
+	lmp_emake -C src yes-snap
+	lmp_emake -C src yes-srd
+	lmp_emake -C src yes-voronoi
+	lmp_emake -C src yes-xtc
+
+	if use mpi; then
+		lmp_emake -C src yes-user-atc
+	fi
+	lmp_emake -C src yes-user-eff
+	lmp_emake -C src yes-user-fep
+	use mpi && lmp_emake -C src yes-user-lb
+	lmp_emake -C src yes-user-phonon
+	lmp_emake -C src yes-user-sph
+}
+
+lmp_build_packages() {
+	lmp_emake -C lib/meam -j1 -f Makefile.gfortran
+	lmp_emake -C lib/poems -f Makefile.g++
+	lmp_emake -C lib/reax -j1 -f Makefile.gfortran
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++
+}
+
+lmp_clean_packages() {
+	lmp_emake -C lib/meam -f Makefile.gfortran clean
+	lmp_emake -C lib/poems -f Makefile.g++ clean
+	lmp_emake -C lib/reax -f Makefile.gfortran clean
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++ clean
+}
+
+src_prepare() {
+	# Fix inconsistent use of SHFLAGS.
+	sed -i \
+		-e 's:voronoi_SYSINC\s\+=.*$:voronoi_SYSINC = -I/usr/include/voro++:' \
+		-e 's:voronoi_SYSPATH\s\+=.*$:voronoi_SYSPATH =:' \
+		lib/voronoi/Makefile.lammps || die
+
+	# Fix missing .so name.
+	sed -i \
+		-e 's:SHLIBFLAGS\s\+=\s\+:SHLIBFLAGS = -Wl,-soname,liblammps.so.0 :' \
+		src/MAKE/Makefile.serial || die
+
+	# Fix makefile in tools.
+	sed -i \
+		-e 's:g++:$(CXX) $(CXXFLAGS):' \
+		-e 's:gcc:$(CC) $(CCFLAGS):' \
+		-e 's:ifort:$(FC) $(FCFLAGS):' \
+		tools/Makefile || die
+
+	# Patch python.
+	epatch "${FILESDIR}/lammps-python3.patch"
+	epatch "${FILESDIR}/python-shebang.patch"
+}
+
+src_compile() {
+	# Fix atc...
+	append-cxxflags -I../../src
+
+	# Acticate packages.
+	elog "Activating lammps packages..."
+	lmp_activate_packages
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	if use static-libs; then
+		# Build static library.
+		elog "Building static library..."
+		lmp_emake -C src mode=lib serial
+	fi
+
+	# Clean out packages (that's not done by the build system with the clean
+	# target), so we can rebuild the packages with -fPIC.
+	elog "Cleaning packages..."
+	lmp_clean_packages
+
+	# The build system does not rebuild the packages with -fPIC, adding flag
+	# manually.
+	append-cxxflags -fPIC
+	append-fflags -fPIC
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	# Build shared library.
+	elog "Building shared library..."
+	lmp_emake -C src mode=shlib serial
+
+	# Compile main executable. The shared library is always built, and
+	# mode=shexe is simply a way to re-use the object files built in the
+	# "shlib" step when linking the executable. The executable is not actually
+	# using the shared library. If we have built the static library, then we
+	# link that into the executable.
+	elog "Linking executable..."
+	if use static-libs; then
+		lmp_emake -C src mode=exe serial
+	else
+		lmp_emake -C src mode=shexe serial
+	fi
+
+	# Compile tools.
+	elog "Building tools..."
+	lmp_emake -C tools binary2txt chain data2xmovie micelle2d
+}
+
+src_install() {
+	use static-libs && newlib.a src/liblammps_serial.a liblammps.a
+	newlib.so src/liblammps_serial.so liblammps.so.0.0.0
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so.0
+	newbin src/lmp_serial lmp
+	dobin tools/binary2txt
+	dobin tools/chain
+	dobin tools/data2xmovie
+	dobin tools/micelle2d
+	# Don't forget to add header files of optional packages as they are added
+	# to this ebuild. There may also be .mod files from Fortran based
+	# packages.
+	insinto "/usr/include/${PN}"
+	doins -r src/*.h lib/meam/*.mod
+
+	local LAMMPS_POTENTIALS="usr/share/${PN}/potentials"
+	insinto "/${LAMMPS_POTENTIALS}"
+	doins potentials/*
+	echo "LAMMPS_POTENTIALS=${EROOT}${LAMMPS_POTENTIALS}" > 99lammps
+	doenvd 99lammps
+
+	# Install python script.
+	use python && python_foreach_impl python_domodule python/lammps.py
+
+	if use examples; then
+		local LAMMPS_EXAMPLES="/usr/share/${PN}/examples"
+		insinto "${LAMMPS_EXAMPLES}"
+		doins -r examples/*
+	fi
+
+	dodoc README
+	if use doc; then
+		dodoc doc/Manual.pdf
+		dohtml -r doc/*
+	fi
+}
diff --git a/sci-physics/lammps/lammps-20150721.ebuild b/sci-physics/lammps/lammps-20150721.ebuild
new file mode 100644
index 000000000000..020cfbdc4747
--- /dev/null
+++ b/sci-physics/lammps/lammps-20150721.ebuild
@@ -0,0 +1,267 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+PYTHON_COMPAT=( python{2_7,3_3} )
+
+inherit eutils flag-o-matic fortran-2 multilib python-r1
+
+convert_month() {
+	case $1 in
+		01) echo Jan
+			;;
+		02) echo Feb
+			;;
+		03) echo Mar
+			;;
+		04) echo Apr
+			;;
+		05) echo May
+			;;
+		06) echo Jun
+			;;
+		07) echo Jul
+			;;
+		08) echo Aug
+			;;
+		09) echo Sep
+			;;
+		10) echo Oct
+			;;
+		11) echo Nov
+			;;
+		12) echo Dec
+			;;
+		*)  echo unknown
+			;;
+	esac
+}
+
+MY_P=${PN}-$((10#${PV:6:2}))$(convert_month ${PV:4:2})${PV:2:2}
+
+DESCRIPTION="Large-scale Atomic/Molecular Massively Parallel Simulator"
+HOMEPAGE="http://lammps.sandia.gov/"
+SRC_URI="http://lammps.sandia.gov/tars/${MY_P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="doc examples gzip lammps-memalign mpi python static-libs"
+
+DEPEND="
+	mpi? (
+		virtual/blas
+		virtual/lapack
+		virtual/mpi
+	)
+	gzip? ( app-arch/gzip )
+	sci-libs/voro++
+	python? ( ${PYTHON_DEPS} )
+	"
+RDEPEND="${DEPEND}"
+
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+S="${WORKDIR}/${MY_P}"
+
+lmp_emake() {
+	local LAMMPS_INCLUDEFLAGS
+	LAMMPS_INCLUDEFLAGS="$(usex gzip '-DLAMMPS_GZIP' '')"
+	LAMMPS_INCLUDEFLAGS+="$(usex lammps-memalign ' -DLAMMPS_MEMALIGN' '')"
+
+	# The lammps makefile uses CC to indicate the C++ compiler.
+	emake \
+		ARCHIVE=$(tc-getAR) \
+		CC=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		F90=$(usex mpi "mpif90" "$(tc-getFC)") \
+		LINK=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		CCFLAGS="${CXXFLAGS}" \
+		F90FLAGS="${FCFLAGS}" \
+		LINKFLAGS="${LDFLAGS}" \
+		LMP_INC="${LAMMPS_INCLUDEFLAGS}" \
+		MPI_INC=$(usex mpi "" "-I../STUBS") \
+		MPI_PATH=$(usex mpi "" "-L../STUBS") \
+		MPI_LIB=$(usex mpi "" "-lmpi_stubs") \
+		user-atc_SYSLIB="$(usex mpi "$($(tc-getPKG_CONFIG) --libs blas) $($(tc-getPKG_CONFIG) --libs lapack)" '')"\
+		"$@"
+}
+
+lmp_activate_packages() {
+	# Build packages
+	lmp_emake -C src yes-asphere
+	lmp_emake -C src yes-body
+	lmp_emake -C src yes-class2
+	lmp_emake -C src yes-colloid
+	lmp_emake -C src yes-coreshell
+	lmp_emake -C src yes-dipole
+	lmp_emake -C src yes-fld
+	#lmp_emake -C src yes-gpu
+	lmp_emake -C src yes-granular
+	# Need OpenKIM external dependency.
+	#lmp_emake -C src yes-kim
+	# Need Kokkos external dependency.
+	#lmp_emake -C src yes-kokkos
+	lmp_emake -C src yes-kspace
+	lmp_emake -C src yes-manybody
+	lmp_emake -C src yes-mc
+	lmp_emake -C src yes-meam
+	lmp_emake -C src yes-misc
+	lmp_emake -C src yes-molecule
+	#lmp_emake -C src yes-mpiio
+	lmp_emake -C src yes-opt
+	lmp_emake -C src yes-peri
+	lmp_emake -C src yes-poems
+	lmp_emake -C src yes-qeq
+	lmp_emake -C src yes-reax
+	lmp_emake -C src yes-replica
+	lmp_emake -C src yes-rigid
+	lmp_emake -C src yes-shock
+	lmp_emake -C src yes-snap
+	lmp_emake -C src yes-srd
+	lmp_emake -C src yes-voronoi
+	lmp_emake -C src yes-xtc
+
+	if use mpi; then
+		lmp_emake -C src yes-user-atc
+	fi
+	lmp_emake -C src yes-user-eff
+	lmp_emake -C src yes-user-fep
+	use mpi && lmp_emake -C src yes-user-lb
+	lmp_emake -C src yes-user-phonon
+	lmp_emake -C src yes-user-sph
+}
+
+lmp_build_packages() {
+	lmp_emake -C lib/meam -j1 -f Makefile.gfortran
+	lmp_emake -C lib/poems -f Makefile.g++
+	lmp_emake -C lib/reax -j1 -f Makefile.gfortran
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++
+}
+
+lmp_clean_packages() {
+	lmp_emake -C lib/meam -f Makefile.gfortran clean
+	lmp_emake -C lib/poems -f Makefile.g++ clean
+	lmp_emake -C lib/reax -f Makefile.gfortran clean
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++ clean
+}
+
+src_prepare() {
+	# Fix inconsistent use of SHFLAGS.
+	sed -i \
+		-e 's:voronoi_SYSINC\s\+=.*$:voronoi_SYSINC = -I/usr/include/voro++:' \
+		-e 's:voronoi_SYSPATH\s\+=.*$:voronoi_SYSPATH =:' \
+		lib/voronoi/Makefile.lammps || die
+
+	# Fix missing .so name.
+	sed -i \
+		-e 's:SHLIBFLAGS\s\+=\s\+:SHLIBFLAGS = -Wl,-soname,liblammps.so.0 :' \
+		src/MAKE/Makefile.serial || die
+
+	# Fix makefile in tools.
+	sed -i \
+		-e 's:g++:$(CXX) $(CXXFLAGS):' \
+		-e 's:gcc:$(CC) $(CCFLAGS):' \
+		-e 's:ifort:$(FC) $(FCFLAGS):' \
+		tools/Makefile || die
+
+	# Patch python.
+	epatch "${FILESDIR}/lammps-python3.patch"
+	epatch "${FILESDIR}/python-shebang.patch"
+}
+
+src_compile() {
+	# Fix atc...
+	append-cxxflags -I../../src
+
+	# Acticate packages.
+	elog "Activating lammps packages..."
+	lmp_activate_packages
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	if use static-libs; then
+		# Build static library.
+		elog "Building static library..."
+		lmp_emake -C src mode=lib serial
+	fi
+
+	# Clean out packages (that's not done by the build system with the clean
+	# target), so we can rebuild the packages with -fPIC.
+	elog "Cleaning packages..."
+	lmp_clean_packages
+
+	# The build system does not rebuild the packages with -fPIC, adding flag
+	# manually.
+	append-cxxflags -fPIC
+	append-fflags -fPIC
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	# Build shared library.
+	elog "Building shared library..."
+	lmp_emake -C src mode=shlib serial
+
+	# Compile main executable. The shared library is always built, and
+	# mode=shexe is simply a way to re-use the object files built in the
+	# "shlib" step when linking the executable. The executable is not actually
+	# using the shared library. If we have built the static library, then we
+	# link that into the executable.
+	elog "Linking executable..."
+	if use static-libs; then
+		lmp_emake -C src mode=exe serial
+	else
+		lmp_emake -C src mode=shexe serial
+	fi
+
+	# Compile tools.
+	elog "Building tools..."
+	lmp_emake -C tools binary2txt chain data2xmovie micelle2d
+}
+
+src_install() {
+	use static-libs && newlib.a src/liblammps_serial.a liblammps.a
+	newlib.so src/liblammps_serial.so liblammps.so.0.0.0
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so.0
+	newbin src/lmp_serial lmp
+	dobin tools/binary2txt
+	dobin tools/chain
+	dobin tools/data2xmovie
+	dobin tools/micelle2d
+	# Don't forget to add header files of optional packages as they are added
+	# to this ebuild. There may also be .mod files from Fortran based
+	# packages.
+	insinto "/usr/include/${PN}"
+	doins -r src/*.h lib/meam/*.mod
+
+	local LAMMPS_POTENTIALS="usr/share/${PN}/potentials"
+	insinto "/${LAMMPS_POTENTIALS}"
+	doins potentials/*
+	echo "LAMMPS_POTENTIALS=${EROOT}${LAMMPS_POTENTIALS}" > 99lammps
+	doenvd 99lammps
+
+	# Install python script.
+	use python && python_foreach_impl python_domodule python/lammps.py
+
+	if use examples; then
+		local LAMMPS_EXAMPLES="/usr/share/${PN}/examples"
+		insinto "${LAMMPS_EXAMPLES}"
+		doins -r examples/*
+	fi
+
+	dodoc README
+	if use doc; then
+		dodoc doc/Manual.pdf
+		dohtml -r doc/*
+	fi
+}
diff --git a/sci-physics/lammps/lammps-20150722.ebuild b/sci-physics/lammps/lammps-20150722.ebuild
new file mode 100644
index 000000000000..020cfbdc4747
--- /dev/null
+++ b/sci-physics/lammps/lammps-20150722.ebuild
@@ -0,0 +1,267 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+PYTHON_COMPAT=( python{2_7,3_3} )
+
+inherit eutils flag-o-matic fortran-2 multilib python-r1
+
+convert_month() {
+	case $1 in
+		01) echo Jan
+			;;
+		02) echo Feb
+			;;
+		03) echo Mar
+			;;
+		04) echo Apr
+			;;
+		05) echo May
+			;;
+		06) echo Jun
+			;;
+		07) echo Jul
+			;;
+		08) echo Aug
+			;;
+		09) echo Sep
+			;;
+		10) echo Oct
+			;;
+		11) echo Nov
+			;;
+		12) echo Dec
+			;;
+		*)  echo unknown
+			;;
+	esac
+}
+
+MY_P=${PN}-$((10#${PV:6:2}))$(convert_month ${PV:4:2})${PV:2:2}
+
+DESCRIPTION="Large-scale Atomic/Molecular Massively Parallel Simulator"
+HOMEPAGE="http://lammps.sandia.gov/"
+SRC_URI="http://lammps.sandia.gov/tars/${MY_P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="doc examples gzip lammps-memalign mpi python static-libs"
+
+DEPEND="
+	mpi? (
+		virtual/blas
+		virtual/lapack
+		virtual/mpi
+	)
+	gzip? ( app-arch/gzip )
+	sci-libs/voro++
+	python? ( ${PYTHON_DEPS} )
+	"
+RDEPEND="${DEPEND}"
+
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+S="${WORKDIR}/${MY_P}"
+
+lmp_emake() {
+	local LAMMPS_INCLUDEFLAGS
+	LAMMPS_INCLUDEFLAGS="$(usex gzip '-DLAMMPS_GZIP' '')"
+	LAMMPS_INCLUDEFLAGS+="$(usex lammps-memalign ' -DLAMMPS_MEMALIGN' '')"
+
+	# The lammps makefile uses CC to indicate the C++ compiler.
+	emake \
+		ARCHIVE=$(tc-getAR) \
+		CC=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		F90=$(usex mpi "mpif90" "$(tc-getFC)") \
+		LINK=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		CCFLAGS="${CXXFLAGS}" \
+		F90FLAGS="${FCFLAGS}" \
+		LINKFLAGS="${LDFLAGS}" \
+		LMP_INC="${LAMMPS_INCLUDEFLAGS}" \
+		MPI_INC=$(usex mpi "" "-I../STUBS") \
+		MPI_PATH=$(usex mpi "" "-L../STUBS") \
+		MPI_LIB=$(usex mpi "" "-lmpi_stubs") \
+		user-atc_SYSLIB="$(usex mpi "$($(tc-getPKG_CONFIG) --libs blas) $($(tc-getPKG_CONFIG) --libs lapack)" '')"\
+		"$@"
+}
+
+lmp_activate_packages() {
+	# Build packages
+	lmp_emake -C src yes-asphere
+	lmp_emake -C src yes-body
+	lmp_emake -C src yes-class2
+	lmp_emake -C src yes-colloid
+	lmp_emake -C src yes-coreshell
+	lmp_emake -C src yes-dipole
+	lmp_emake -C src yes-fld
+	#lmp_emake -C src yes-gpu
+	lmp_emake -C src yes-granular
+	# Need OpenKIM external dependency.
+	#lmp_emake -C src yes-kim
+	# Need Kokkos external dependency.
+	#lmp_emake -C src yes-kokkos
+	lmp_emake -C src yes-kspace
+	lmp_emake -C src yes-manybody
+	lmp_emake -C src yes-mc
+	lmp_emake -C src yes-meam
+	lmp_emake -C src yes-misc
+	lmp_emake -C src yes-molecule
+	#lmp_emake -C src yes-mpiio
+	lmp_emake -C src yes-opt
+	lmp_emake -C src yes-peri
+	lmp_emake -C src yes-poems
+	lmp_emake -C src yes-qeq
+	lmp_emake -C src yes-reax
+	lmp_emake -C src yes-replica
+	lmp_emake -C src yes-rigid
+	lmp_emake -C src yes-shock
+	lmp_emake -C src yes-snap
+	lmp_emake -C src yes-srd
+	lmp_emake -C src yes-voronoi
+	lmp_emake -C src yes-xtc
+
+	if use mpi; then
+		lmp_emake -C src yes-user-atc
+	fi
+	lmp_emake -C src yes-user-eff
+	lmp_emake -C src yes-user-fep
+	use mpi && lmp_emake -C src yes-user-lb
+	lmp_emake -C src yes-user-phonon
+	lmp_emake -C src yes-user-sph
+}
+
+lmp_build_packages() {
+	lmp_emake -C lib/meam -j1 -f Makefile.gfortran
+	lmp_emake -C lib/poems -f Makefile.g++
+	lmp_emake -C lib/reax -j1 -f Makefile.gfortran
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++
+}
+
+lmp_clean_packages() {
+	lmp_emake -C lib/meam -f Makefile.gfortran clean
+	lmp_emake -C lib/poems -f Makefile.g++ clean
+	lmp_emake -C lib/reax -f Makefile.gfortran clean
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++ clean
+}
+
+src_prepare() {
+	# Fix inconsistent use of SHFLAGS.
+	sed -i \
+		-e 's:voronoi_SYSINC\s\+=.*$:voronoi_SYSINC = -I/usr/include/voro++:' \
+		-e 's:voronoi_SYSPATH\s\+=.*$:voronoi_SYSPATH =:' \
+		lib/voronoi/Makefile.lammps || die
+
+	# Fix missing .so name.
+	sed -i \
+		-e 's:SHLIBFLAGS\s\+=\s\+:SHLIBFLAGS = -Wl,-soname,liblammps.so.0 :' \
+		src/MAKE/Makefile.serial || die
+
+	# Fix makefile in tools.
+	sed -i \
+		-e 's:g++:$(CXX) $(CXXFLAGS):' \
+		-e 's:gcc:$(CC) $(CCFLAGS):' \
+		-e 's:ifort:$(FC) $(FCFLAGS):' \
+		tools/Makefile || die
+
+	# Patch python.
+	epatch "${FILESDIR}/lammps-python3.patch"
+	epatch "${FILESDIR}/python-shebang.patch"
+}
+
+src_compile() {
+	# Fix atc...
+	append-cxxflags -I../../src
+
+	# Acticate packages.
+	elog "Activating lammps packages..."
+	lmp_activate_packages
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	if use static-libs; then
+		# Build static library.
+		elog "Building static library..."
+		lmp_emake -C src mode=lib serial
+	fi
+
+	# Clean out packages (that's not done by the build system with the clean
+	# target), so we can rebuild the packages with -fPIC.
+	elog "Cleaning packages..."
+	lmp_clean_packages
+
+	# The build system does not rebuild the packages with -fPIC, adding flag
+	# manually.
+	append-cxxflags -fPIC
+	append-fflags -fPIC
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	# Build shared library.
+	elog "Building shared library..."
+	lmp_emake -C src mode=shlib serial
+
+	# Compile main executable. The shared library is always built, and
+	# mode=shexe is simply a way to re-use the object files built in the
+	# "shlib" step when linking the executable. The executable is not actually
+	# using the shared library. If we have built the static library, then we
+	# link that into the executable.
+	elog "Linking executable..."
+	if use static-libs; then
+		lmp_emake -C src mode=exe serial
+	else
+		lmp_emake -C src mode=shexe serial
+	fi
+
+	# Compile tools.
+	elog "Building tools..."
+	lmp_emake -C tools binary2txt chain data2xmovie micelle2d
+}
+
+src_install() {
+	use static-libs && newlib.a src/liblammps_serial.a liblammps.a
+	newlib.so src/liblammps_serial.so liblammps.so.0.0.0
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so.0
+	newbin src/lmp_serial lmp
+	dobin tools/binary2txt
+	dobin tools/chain
+	dobin tools/data2xmovie
+	dobin tools/micelle2d
+	# Don't forget to add header files of optional packages as they are added
+	# to this ebuild. There may also be .mod files from Fortran based
+	# packages.
+	insinto "/usr/include/${PN}"
+	doins -r src/*.h lib/meam/*.mod
+
+	local LAMMPS_POTENTIALS="usr/share/${PN}/potentials"
+	insinto "/${LAMMPS_POTENTIALS}"
+	doins potentials/*
+	echo "LAMMPS_POTENTIALS=${EROOT}${LAMMPS_POTENTIALS}" > 99lammps
+	doenvd 99lammps
+
+	# Install python script.
+	use python && python_foreach_impl python_domodule python/lammps.py
+
+	if use examples; then
+		local LAMMPS_EXAMPLES="/usr/share/${PN}/examples"
+		insinto "${LAMMPS_EXAMPLES}"
+		doins -r examples/*
+	fi
+
+	dodoc README
+	if use doc; then
+		dodoc doc/Manual.pdf
+		dohtml -r doc/*
+	fi
+}
diff --git a/sci-physics/lammps/lammps-20150724.ebuild b/sci-physics/lammps/lammps-20150724.ebuild
new file mode 100644
index 000000000000..020cfbdc4747
--- /dev/null
+++ b/sci-physics/lammps/lammps-20150724.ebuild
@@ -0,0 +1,267 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+PYTHON_COMPAT=( python{2_7,3_3} )
+
+inherit eutils flag-o-matic fortran-2 multilib python-r1
+
+convert_month() {
+	case $1 in
+		01) echo Jan
+			;;
+		02) echo Feb
+			;;
+		03) echo Mar
+			;;
+		04) echo Apr
+			;;
+		05) echo May
+			;;
+		06) echo Jun
+			;;
+		07) echo Jul
+			;;
+		08) echo Aug
+			;;
+		09) echo Sep
+			;;
+		10) echo Oct
+			;;
+		11) echo Nov
+			;;
+		12) echo Dec
+			;;
+		*)  echo unknown
+			;;
+	esac
+}
+
+MY_P=${PN}-$((10#${PV:6:2}))$(convert_month ${PV:4:2})${PV:2:2}
+
+DESCRIPTION="Large-scale Atomic/Molecular Massively Parallel Simulator"
+HOMEPAGE="http://lammps.sandia.gov/"
+SRC_URI="http://lammps.sandia.gov/tars/${MY_P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="doc examples gzip lammps-memalign mpi python static-libs"
+
+DEPEND="
+	mpi? (
+		virtual/blas
+		virtual/lapack
+		virtual/mpi
+	)
+	gzip? ( app-arch/gzip )
+	sci-libs/voro++
+	python? ( ${PYTHON_DEPS} )
+	"
+RDEPEND="${DEPEND}"
+
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+S="${WORKDIR}/${MY_P}"
+
+lmp_emake() {
+	local LAMMPS_INCLUDEFLAGS
+	LAMMPS_INCLUDEFLAGS="$(usex gzip '-DLAMMPS_GZIP' '')"
+	LAMMPS_INCLUDEFLAGS+="$(usex lammps-memalign ' -DLAMMPS_MEMALIGN' '')"
+
+	# The lammps makefile uses CC to indicate the C++ compiler.
+	emake \
+		ARCHIVE=$(tc-getAR) \
+		CC=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		F90=$(usex mpi "mpif90" "$(tc-getFC)") \
+		LINK=$(usex mpi "mpic++" "$(tc-getCXX)") \
+		CCFLAGS="${CXXFLAGS}" \
+		F90FLAGS="${FCFLAGS}" \
+		LINKFLAGS="${LDFLAGS}" \
+		LMP_INC="${LAMMPS_INCLUDEFLAGS}" \
+		MPI_INC=$(usex mpi "" "-I../STUBS") \
+		MPI_PATH=$(usex mpi "" "-L../STUBS") \
+		MPI_LIB=$(usex mpi "" "-lmpi_stubs") \
+		user-atc_SYSLIB="$(usex mpi "$($(tc-getPKG_CONFIG) --libs blas) $($(tc-getPKG_CONFIG) --libs lapack)" '')"\
+		"$@"
+}
+
+lmp_activate_packages() {
+	# Build packages
+	lmp_emake -C src yes-asphere
+	lmp_emake -C src yes-body
+	lmp_emake -C src yes-class2
+	lmp_emake -C src yes-colloid
+	lmp_emake -C src yes-coreshell
+	lmp_emake -C src yes-dipole
+	lmp_emake -C src yes-fld
+	#lmp_emake -C src yes-gpu
+	lmp_emake -C src yes-granular
+	# Need OpenKIM external dependency.
+	#lmp_emake -C src yes-kim
+	# Need Kokkos external dependency.
+	#lmp_emake -C src yes-kokkos
+	lmp_emake -C src yes-kspace
+	lmp_emake -C src yes-manybody
+	lmp_emake -C src yes-mc
+	lmp_emake -C src yes-meam
+	lmp_emake -C src yes-misc
+	lmp_emake -C src yes-molecule
+	#lmp_emake -C src yes-mpiio
+	lmp_emake -C src yes-opt
+	lmp_emake -C src yes-peri
+	lmp_emake -C src yes-poems
+	lmp_emake -C src yes-qeq
+	lmp_emake -C src yes-reax
+	lmp_emake -C src yes-replica
+	lmp_emake -C src yes-rigid
+	lmp_emake -C src yes-shock
+	lmp_emake -C src yes-snap
+	lmp_emake -C src yes-srd
+	lmp_emake -C src yes-voronoi
+	lmp_emake -C src yes-xtc
+
+	if use mpi; then
+		lmp_emake -C src yes-user-atc
+	fi
+	lmp_emake -C src yes-user-eff
+	lmp_emake -C src yes-user-fep
+	use mpi && lmp_emake -C src yes-user-lb
+	lmp_emake -C src yes-user-phonon
+	lmp_emake -C src yes-user-sph
+}
+
+lmp_build_packages() {
+	lmp_emake -C lib/meam -j1 -f Makefile.gfortran
+	lmp_emake -C lib/poems -f Makefile.g++
+	lmp_emake -C lib/reax -j1 -f Makefile.gfortran
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++
+}
+
+lmp_clean_packages() {
+	lmp_emake -C lib/meam -f Makefile.gfortran clean
+	lmp_emake -C lib/poems -f Makefile.g++ clean
+	lmp_emake -C lib/reax -f Makefile.gfortran clean
+	use mpi && lmp_emake -C lib/atc -f Makefile.g++ clean
+}
+
+src_prepare() {
+	# Fix inconsistent use of SHFLAGS.
+	sed -i \
+		-e 's:voronoi_SYSINC\s\+=.*$:voronoi_SYSINC = -I/usr/include/voro++:' \
+		-e 's:voronoi_SYSPATH\s\+=.*$:voronoi_SYSPATH =:' \
+		lib/voronoi/Makefile.lammps || die
+
+	# Fix missing .so name.
+	sed -i \
+		-e 's:SHLIBFLAGS\s\+=\s\+:SHLIBFLAGS = -Wl,-soname,liblammps.so.0 :' \
+		src/MAKE/Makefile.serial || die
+
+	# Fix makefile in tools.
+	sed -i \
+		-e 's:g++:$(CXX) $(CXXFLAGS):' \
+		-e 's:gcc:$(CC) $(CCFLAGS):' \
+		-e 's:ifort:$(FC) $(FCFLAGS):' \
+		tools/Makefile || die
+
+	# Patch python.
+	epatch "${FILESDIR}/lammps-python3.patch"
+	epatch "${FILESDIR}/python-shebang.patch"
+}
+
+src_compile() {
+	# Fix atc...
+	append-cxxflags -I../../src
+
+	# Acticate packages.
+	elog "Activating lammps packages..."
+	lmp_activate_packages
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	if use static-libs; then
+		# Build static library.
+		elog "Building static library..."
+		lmp_emake -C src mode=lib serial
+	fi
+
+	# Clean out packages (that's not done by the build system with the clean
+	# target), so we can rebuild the packages with -fPIC.
+	elog "Cleaning packages..."
+	lmp_clean_packages
+
+	# The build system does not rebuild the packages with -fPIC, adding flag
+	# manually.
+	append-cxxflags -fPIC
+	append-fflags -fPIC
+
+	# Compile stubs for serial version.
+	use mpi || lmp_emake -C src mpi-stubs
+
+	elog "Building packages..."
+	lmp_build_packages
+
+	# Build shared library.
+	elog "Building shared library..."
+	lmp_emake -C src mode=shlib serial
+
+	# Compile main executable. The shared library is always built, and
+	# mode=shexe is simply a way to re-use the object files built in the
+	# "shlib" step when linking the executable. The executable is not actually
+	# using the shared library. If we have built the static library, then we
+	# link that into the executable.
+	elog "Linking executable..."
+	if use static-libs; then
+		lmp_emake -C src mode=exe serial
+	else
+		lmp_emake -C src mode=shexe serial
+	fi
+
+	# Compile tools.
+	elog "Building tools..."
+	lmp_emake -C tools binary2txt chain data2xmovie micelle2d
+}
+
+src_install() {
+	use static-libs && newlib.a src/liblammps_serial.a liblammps.a
+	newlib.so src/liblammps_serial.so liblammps.so.0.0.0
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so
+	dosym liblammps.so.0.0.0 /usr/$(get_libdir)/liblammps.so.0
+	newbin src/lmp_serial lmp
+	dobin tools/binary2txt
+	dobin tools/chain
+	dobin tools/data2xmovie
+	dobin tools/micelle2d
+	# Don't forget to add header files of optional packages as they are added
+	# to this ebuild. There may also be .mod files from Fortran based
+	# packages.
+	insinto "/usr/include/${PN}"
+	doins -r src/*.h lib/meam/*.mod
+
+	local LAMMPS_POTENTIALS="usr/share/${PN}/potentials"
+	insinto "/${LAMMPS_POTENTIALS}"
+	doins potentials/*
+	echo "LAMMPS_POTENTIALS=${EROOT}${LAMMPS_POTENTIALS}" > 99lammps
+	doenvd 99lammps
+
+	# Install python script.
+	use python && python_foreach_impl python_domodule python/lammps.py
+
+	if use examples; then
+		local LAMMPS_EXAMPLES="/usr/share/${PN}/examples"
+		insinto "${LAMMPS_EXAMPLES}"
+		doins -r examples/*
+	fi
+
+	dodoc README
+	if use doc; then
+		dodoc doc/Manual.pdf
+		dohtml -r doc/*
+	fi
+}
diff --git a/sci-physics/lammps/metadata.xml b/sci-physics/lammps/metadata.xml
new file mode 100644
index 000000000000..5d67bcd349fa
--- /dev/null
+++ b/sci-physics/lammps/metadata.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+  <longdescription lang="en">
+		LAMMPS is a classical molecular dynamics code, and an acronym for
+		Large-scale Atomic/Molecular Massively Parallel Simulator.
+
+		LAMMPS has potentials for soft materials (biomolecules, polymers) and
+		solid-state materials (metals, semiconductors) and coarse-grained or
+		mesoscopic systems. It can be used to model atoms or, more generically,
+		as a parallel particle simulator at the atomic, meso, or continuum
+		scale.
+
+		LAMMPS runs on single processors or in parallel using message-passing
+		techniques and a spatial-decomposition of the simulation domain. The
+		code is designed to be easy to modify or extend with new functionality. 
+	</longdescription>
+  <use>
+    <flag name="lammps-memalign">Enables the use of the posix_memalign()
+			call instead of malloc() when large chunks or memory are allocated
+			by LAMMPS</flag>
+  </use>
+  <herd>sci-physics</herd>
+  <maintainer>
+    <email>nicolasbock@gentoo.org</email>
+	<name>Nicolas Bock</name>
+  </maintainer>
+</pkgmetadata>