--- /dev/null
+From bdfec26744122e8f52a58bc086c89b27faaf5888 Mon Sep 17 00:00:00 2001
+From: Alon Bar-Lev <alon.barlev@gmail.com>
+Date: Sat, 1 Jul 2017 23:06:41 +0300
+Subject: [PATCH 1/2] build: move non-essential flags to *_EXTRA
+
+This enables downstream to selectively add/replace the optimization and
+other non-essential flags.
+
+Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>
+---
+ Makefile | 11 ++++++-----
+ 1 file changed, 6 insertions(+), 5 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index 7022a4a..c9313cb 100644
+--- a/Makefile
++++ b/Makefile
+@@ -5,21 +5,22 @@ MAKE_DIR ?= install -d
+ INSTALL_DATA ?= install
+
+ CC?=gcc
+-CFLAGS?=-O2 -Wall -g -D_FORTIFY_SOURCE=2 -fstack-protector -fPIC
+-LDFLAGS?=-Wl,-z,now -Wl,-z,relro -Wl,-soname,libscrypt.so.0 -Wl,--version-script=libscrypt.version
+-CFLAGS_EXTRA?=-Wl,-rpath=.
++CFLAGS?=$(CFLAGS_EXTRA) -D_FORTIFY_SOURCE=2 -fPIC
++LDFLAGS?=$(LDFLAGS_EXTRA) -Wl,-soname,libscrypt.so.0 -Wl,--version-script=libscrypt.version
++CFLAGS_EXTRA?=-Wl,-rpath=. -O2 -Wall -g -fstack-protector
++LDFLAGS_EXTRA?=-Wl,-z,relro
+
+ all: reference
+
+ OBJS= crypto_scrypt-nosse.o sha256.o crypto-mcf.o b64.o crypto-scrypt-saltgen.o crypto_scrypt-check.o crypto_scrypt-hash.o slowequals.o
+
+ libscrypt.so.0: $(OBJS)
+- $(CC) $(LDFLAGS) -shared -o libscrypt.so.0 $(OBJS) -lm -lc
++ $(CC) $(LDFLAGS) -shared -o libscrypt.so.0 $(OBJS) -lm -lc
+ ar rcs libscrypt.a $(OBJS)
+
+ reference: libscrypt.so.0 main.o crypto_scrypt-hexconvert.o
+ ln -s -f libscrypt.so.0 libscrypt.so
+- $(CC) -Wall -o reference main.o b64.o crypto_scrypt-hexconvert.o $(CFLAGS_EXTRA) -L. -lscrypt
++ $(CC) -o reference main.o b64.o crypto_scrypt-hexconvert.o $(CFLAGS) $(LDFLAGS_EXTRA) -L. -lscrypt
+
+ clean:
+ rm -f *.o reference libscrypt.so* libscrypt.a endian.h
+--
+2.13.0
+
+From 7899df0447e0fcad32a6cce7439eef1f1295aaeb Mon Sep 17 00:00:00 2001
+From: Alon Bar-Lev <alon.barlev@gmail.com>
+Date: Sat, 1 Jul 2017 23:14:29 +0300
+Subject: [PATCH 2/2] build: run tests with local library
+
+Ensure tests can run and when run are run with current library.
+
+Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>
+---
+ Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Makefile b/Makefile
+index c9313cb..783c537 100644
+--- a/Makefile
++++ b/Makefile
+@@ -26,7 +26,7 @@ clean:
+ rm -f *.o reference libscrypt.so* libscrypt.a endian.h
+
+ check: all
+- ./reference
++ LD_LIBRARY_PATH=. ./reference
+
+ devtest:
+ splint crypto_scrypt-hexconvert.c
+--
+2.13.0
+
--- /dev/null
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit toolchain-funcs
+
+DESCRIPTION="Shared library to impliment the scrypt algorithm"
+HOMEPAGE="https://github.com/technion/libscrypt"
+SRC_URI="https://github.com/technion/${PN}/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="BSD-2"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~mips ~ppc ~ppc64 ~sparc ~x86"
+IUSE=""
+
+DEPEND=""
+RDEPEND="${DEPEND}"
+
+PATCHES=(
+ "${FILESDIR}/${P}-build.patch"
+)
+
+pkg_setup() {
+ export LIBDIR=${PREFIX}/$(get_libdir)
+ export CFLAGS_EXTRA="${CFLAGS}"
+ export LDFLAGS_EXTRA="${LDFLAGS}"
+ export PREFIX=/usr
+ unset CFLAGS
+ unset LDFLAGS
+}
+
+src_compile() {
+ emake \
+ CC=$(tc-getCC)
+}