portapack-havoc: there seems to be something wrong with hackrf_spiflash, so I wouldn't suggest testing this right now

net-wireless/portapack-havoc/metadata.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>zerochaos@gentoo.org</email>
+		<name>Rick Farina</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">furrtek/portapack-havoc</remote-id>
+	</upstream>
+</pkgmetadata>

net-wireless/portapack-havoc/portapack-havoc-9999.ebuild

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+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+DESCRIPTION="Custom firmware for the HackRF SDR + PortaPack H1 addon"
+HOMEPAGE="https://github.com/furrtek/portapack-havoc/wiki"
+
+LICENSE="GPL-2"
+SLOT="0"
+IUSE=""
+
+if [ "${PV}" == "9999" ]; then
+	DEPEND="sys-devel/gcc-arm-none-eabi"
+	inherit git-r3 cmake-utils
+	EGIT_REPO_URI="https://github.com/furrtek/portapack-havoc.git"
+	KEYWORDS=""
+else
+	KEYWORDS="~amd64 ~arm ~x86"
+fi
+
+PDEPEND=">=net-wireless/hackrf-tools-2015.07.2-r1
+	>=app-mobilephone/dfu-util-0.7"
+
+src_configure() {
+	if [ "${PV}" = "9999" ]; then
+		strip-flags
+		filter-flags -march=native -mtune=native
+		cmake-utils_src_configure
+	else
+		true
+	fi
+}
+
+src_install() {
+	insinto /usr/share/hackrf
+	newins firmware/portapack-h1-havoc.bin portapack-h1-havoc-${PV}.bin
+	ln -s portapack-h1-havoc-${PV}.bin "${ED}/usr/share/hackrf/portapack-h1-havoc.bin"
+
+	cat << EOF > switch_to_havoc
+#!/bin/sh
+printf "Hold down the HackRF's DFU button (the button closest to the antenna jack)\n"
+printf "then plug the HackRF into a USB port on your computer.\n"
+printf "After the HackRF is plugged in, you may release the DFU button.\n"
+printf "Press any key to continue or ^c to abort\n"
+read
+dfu-util --device 1fc9:000c --download /usr/share/hackrf/hackrf_one_usb_ram.dfu --reset
+sleep 2s
+hackrf_spiflash -w /usr/share/hackrf/portapack-h1-havoc.bin
+EOF
+	dobin switch_to_havoc
+}