dev-libs/beignet: fix detection of OCL ICD and installation of ICD files

In the past, Beignet CMake scripts would automatically enable its compatibility
with the OCL ICD Loader depending on whether dev-libs/ocl-icd was found in the
system or not. Patch the scripts so that ocl-icd is only searched for if an
appropriate option is set, and define a local use flag which controls the value
of this option (and of course the dependency on dev-libs/ocl-icd). Nb. the
patch has been submitted upstream.

Moreover, given we always install Beignet ICD files (they are needed by
eselect-opencl) do not install another copy when OCL ICD Loader has been
enabled.

Gentoo-Bug: https://bugs.gentoo.org/show_bug.cgi?id=599512

Package-Manager: portage-2.3.2

dev-libs/beignet/beignet-1.2.1-r1.ebuild

@@ -0,0 +1,103 @@
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=6
+
+PYTHON_COMPAT=( python2_7 )
+CMAKE_BUILD_TYPE="Release"
+
+inherit python-any-r1 cmake-multilib flag-o-matic toolchain-funcs
+
+DESCRIPTION="OpenCL implementation for Intel GPUs"
+HOMEPAGE="https://01.org/beignet"
+
+LICENSE="LGPL-2.1+"
+SLOT="0"
+IUSE="ocl-icd"
+
+if [[ "${PV}" == "9999" ]]; then
+	inherit git-r3
+	EGIT_REPO_URI="git://anongit.freedesktop.org/beignet"
+	KEYWORDS=""
+else
+	KEYWORDS="~amd64"
+	SRC_URI="https://01.org/sites/default/files/${P}-source.tar.gz"
+	S=${WORKDIR}/Beignet-${PV}-Source
+fi
+
+COMMON="${PYTHON_DEPS}
+	media-libs/mesa
+	sys-devel/clang
+	>=sys-devel/llvm-3.5
+	>=x11-libs/libdrm-2.4.70[video_cards_intel]
+	x11-libs/libXext
+	x11-libs/libXfixes"
+RDEPEND="${COMMON}
+	app-eselect/eselect-opencl"
+DEPEND="${COMMON}
+	${PYTHON_DEPS}
+	ocl-icd? ( dev-libs/ocl-icd )
+	virtual/pkgconfig"
+
+PATCHES=(
+	"${FILESDIR}"/no-debian-multiarch.patch
+	"${FILESDIR}"/${P}-oclicd_optional_gentoo.patch
+	"${FILESDIR}"/${PN}-1.2.0_no-hardcoded-cflags.patch
+	"${FILESDIR}"/llvm-terminfo.patch
+)
+
+DOCS=(
+	docs/.
+)
+
+pkg_pretend() {
+	if [[ ${MERGE_TYPE} != "binary" ]]; then
+		if tc-is-gcc; then
+			if [[ $(gcc-major-version) -eq 4 ]] && [[ $(gcc-minor-version) -lt 6 ]]; then
+				eerror "Compilation with gcc older than 4.6 is not supported"
+				die "Too old gcc found."
+			fi
+		fi
+	fi
+}
+
+pkg_setup() {
+	python_setup
+}
+
+src_prepare() {
+	# See Bug #593968
+	append-flags -fPIC
+
+	cmake-utils_src_prepare
+	# We cannot run tests because they require permissions to access
+	# the hardware, and building them is very time-consuming.
+	cmake_comment_add_subdirectory utests
+}
+
+multilib_src_configure() {
+	VENDOR_DIR="/usr/$(get_libdir)/OpenCL/vendors/${PN}"
+
+	local mycmakeargs=(
+		-DCMAKE_INSTALL_PREFIX="${VENDOR_DIR}"
+		-DOCLICD_COMPAT=$(usex ocl-icd)
+	)
+
+	cmake-utils_src_configure
+}
+
+multilib_src_install() {
+	VENDOR_DIR="/usr/$(get_libdir)/OpenCL/vendors/${PN}"
+
+	cmake-utils_src_install
+
+	insinto /etc/OpenCL/vendors/
+	echo "${VENDOR_DIR}/lib/${PN}/libcl.so" > "${PN}-${ABI}.icd" || die "Failed to generate ICD file"
+	doins "${PN}-${ABI}.icd"
+
+	dosym "lib/${PN}/libcl.so" "${VENDOR_DIR}"/libOpenCL.so.1
+	dosym "lib/${PN}/libcl.so" "${VENDOR_DIR}"/libOpenCL.so
+	dosym "lib/${PN}/libcl.so" "${VENDOR_DIR}"/libcl.so.1
+	dosym "lib/${PN}/libcl.so" "${VENDOR_DIR}"/libcl.so
+}

dev-libs/beignet/files/beignet-1.2.1-oclicd_optional_gentoo.patch

@@ -0,0 +1,23 @@
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -223,17 +223,15 @@
+ #  MESSAGE(STATUS "Looking for mesa source code - not found, cl_khr_gl_sharing will be disabled.")
+ #ENDIF(MESA_SOURCE_FOUND)
+ 
++OPTION(OCLICD_COMPAT "OCL ICD compatibility mode" ON)
++IF(OCLICD_COMPAT)
+ Find_Package(OCLIcd)
+ IF(OCLIcd_FOUND)
+   MESSAGE(STATUS "Looking for OCL ICD header file - found")
+-  configure_file (
+-    "intel-beignet.icd.in"
+-    "${ICD_FILE_NAME}"
+-  )
+-  install (FILES ${CMAKE_CURRENT_BINARY_DIR}/${ICD_FILE_NAME} DESTINATION /etc/OpenCL/vendors)
+ ELSE(OCLIcd_FOUND)
+   MESSAGE(STATUS "Looking for OCL ICD header file - not found")
+ ENDIF(OCLIcd_FOUND)
++ENDIF(OCLICD_COMPAT)
+ 
+ Find_Package(PythonInterp)
+ 

dev-libs/beignet/metadata.xml

@@ -5,4 +5,8 @@
 		<email>marecki@gentoo.org</email>
 		<name>Marek Szuba</name>
 	</maintainer>
+	<use>
+		<flag name="ocl-icd">Enable compatibility with the
+		<pkg>dev-libs/ocl-icd</pkg> OpenCL ICD loader</flag>
+	</use>
 </pkgmetadata>