diff --git a/app-misc/fcmp/Manifest b/app-misc/fcmp/Manifest
index 7b0d43f..d2b5994 100644
--- a/app-misc/fcmp/Manifest
+++ b/app-misc/fcmp/Manifest
@@ -2,3 +2,4 @@ DIST fcmp-0.1.0.tar.gz 1737 BLAKE2B f90a00d17db10da07ab75a2ac75dff06985437540e7f
 DIST fcmp-0.1.1.tar.gz 14613 BLAKE2B c21ae434512d0305cf1fbc25ac361b2480ff43095b98d06fe4cfbeae43e8ad913c2de278411a8950f466cc9e500491ce4b583bd64023f1d2ca68fb4184d218dc SHA512 2640234317163f66e9f5b151822f72579f786126d5bbb1df8fd84a32078b31f1d10672b5c6d42e147753e21c6c23971b3a83c1f84afddf233e87acd3128b1a36
 DIST fcmp-0.2.0.tar.gz 15189 BLAKE2B e5f8040a97f740144331d758d19b967572ce7c8148cbb7cb0d6236ce8c92fa794a752baa8c26b528147f64ee5a92fd4f187167301a9e58ab92f1d1a7ed83a755 SHA512 aee45e73aa5a0d70e8e8f6b6474ef3e1c1b8e89cc0f5f29aff3b76a78ce2e31a8b348632ce9e5beb17071b4d7fddea6a37ecc6876caf4fe391939a8bdce7b6f9
 DIST fcmp-0.3.0.tar.gz 17292 BLAKE2B 85e7aebd0bbc0584449c19848915c1ffa2ef32bb3515f62efe78ae3f9234aecb25d2ece1c26d6d9e95c8b590594f7f3f048c27777c93485935cb17413856b965 SHA512 7804e3188cce86eb4bac93feb635d451b4a871b91bcd6426939b145ffefc13725597205c7f8041c9c22cc6575c1fc3a29a08e23bd3023bddfef188660722726f
+DIST fcmp-0.3.1.tar.gz 18590 BLAKE2B d67d2304c4ebbae0047cc822409076d3d1a11abaf2a15cee21874ee8371034d2b119f1be2651347c3de8feacd2d4bd0719a525bc0631f607520982b59a18e7e0 SHA512 037cfc768a6b4a6aad31e561ad0689ff9e78713dc8d12fcfe6d25432f14560ebd8087e1f161b8c94d8a101e4ba673f3c12d49dce74d2a024b75b2aa0aa672567
diff --git a/app-misc/fcmp/fcmp-0.3.1.ebuild b/app-misc/fcmp/fcmp-0.3.1.ebuild
new file mode 100644
index 0000000..07c841b
--- /dev/null
+++ b/app-misc/fcmp/fcmp-0.3.1.ebuild
@@ -0,0 +1,51 @@
+# Copyright 2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+DESCRIPTION="Quickly compare files for identity"
+HOMEPAGE="https://git.flanchan.moe/flanchan/fcmp"
+SRC_URI="https://git.flanchan.moe/flanchan/fcmp/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="GPL-3+"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+
+DEPEND=""
+RDEPEND="${DEPEND}"
+BDEPEND=""
+
+IUSE="debug threads pgo"
+
+REQUIRED_USE="pgo? ( !debug )"
+
+src_unpack() {
+	default
+	mv ${PN} ${P}
+}
+
+src_compile() {
+
+	local FEAT_CFLAGS
+	local FEAT_LDFLAGS
+
+	if use threads; then
+		FEAT_CFLAGS="-D_RUN_THREADED=0"
+		FEAT_LDFLAGS="-lpthread"
+	fi
+
+	if use debug; then
+		FEAT_CFLAGS="${FEAT_CFLAGS}" FEAT_LDFLAGS="${FEAT_LDFLAGS}" CFLAGS="" LDFLAGS="" emake debug
+		mv ${PN}-debug ${PN}
+	elif use pgo; then
+		FEAT_CFLAGS="${FEAT_CFLAGS}" FEAT_LDFLAGS="${FEAT_LDFLAGS}" RELEASE_CFLAGS="" RELEASE_LDFLAGS="" emake pgo
+		mv ${PN}-pgo ${PN}
+	else
+		FEAT_CFLAGS="${FEAT_CFLAGS}" FEAT_LDFLAGS="${FEAT_LDFLAGS}" RELEASE_CFLAGS="" RELEASE_LDFLAGS="" default
+		mv ${PN}-release ${PN}
+	fi
+}
+
+src_install() {
+	dobin ${PN}
+}
diff --git a/app-misc/fcmp/metadata.xml b/app-misc/fcmp/metadata.xml
index 5580376..5433749 100644
--- a/app-misc/fcmp/metadata.xml
+++ b/app-misc/fcmp/metadata.xml
@@ -5,4 +5,7 @@
 <email>avril@flanchan.moe</email>
 <name>Flops</name>
 </maintainer>
+<use>
+	<flag name="pgo">Build with Profile Guided Optimisation</flag>
+</use>
 </pkgmetadata>