microcode-data: add USE flags to control install of file sets #403119

With newer kernels, there's no need to install the microcode.dat file
as they can automatically load the ucode files themselves.  Add USE
flags so people can avoid installing the parts they don't need.

sys-apps/microcode-data/metadata.xml

@@ -2,4 +2,8 @@
 <!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
 <herd>base-system</herd>
+<use>
+	<flag name='monolithic'>install the large text microcode.dat (used by older kernels via microcode_ctl)</flag>
+	<flag name='split-ucode'>install the split binary ucode files (used by the kernel directly)</flag>
+</use>
 </pkgmetadata>

sys-apps/microcode-data/microcode-data-20150121-r1.ebuild

@@ -0,0 +1,49 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI="4"
+
+inherit toolchain-funcs
+
+# Find updates by searching and clicking the first link (hopefully it's the one):
+# http://www.intel.com/content/www/us/en/search.html?keyword=Processor+Microcode+Data+File
+
+NUM="24661"
+DESCRIPTION="Intel IA32 microcode update data"
+HOMEPAGE="http://inertiawar.com/microcode/ https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=${NUM}"
+SRC_URI="http://downloadmirror.intel.com/${NUM}/eng/microcode-${PV}.tgz"
+
+LICENSE="intel-ucode"
+SLOT="0"
+KEYWORDS="-* ~amd64 ~x86"
+IUSE="monolithic +split-ucode"
+REQUIRED_USE="|| ( monolithic split-ucode )"
+
+RDEPEND="!<sys-apps/microcode-ctl-1.17-r2" #268586
+
+S=${WORKDIR}
+
+src_unpack() {
+	default
+	cp "${FILESDIR}"/intel-microcode2ucode.c ./ || die
+}
+
+src_compile() {
+	if use split-ucode ; then
+		tc-env_build emake intel-microcode2ucode
+		./intel-microcode2ucode microcode.dat || die
+	fi
+}
+
+src_install() {
+	insinto /lib/firmware
+	use monolithic && doins microcode.dat
+	use split-ucode && doins -r intel-ucode
+}
+
+pkg_postinst() {
+	elog "The microcode available for Intel CPUs has been updated.  You'll need"
+	elog "to reload the code into your processor.  If you're using the init.d:"
+	elog "/etc/init.d/microcode_ctl restart"
+}