[gentoo-dev] [PATCH] virtual/opencl: new version

[Marek Szuba]

Instead of pulling in various OpenCL runtimes, only depend on
eselect-opencl and an OpenCL ICD loader (dev-libs/ocl-icd) in order
to provide hardware-independent header files and libraries for
OpenCL-aware software to build against. Actual runtimes are now simply
suggested to the user via a postinst message.

Signed-off-by: Marek Szuba <marecki@g.o>
---
 virtual/opencl/opencl-3.ebuild | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 virtual/opencl/opencl-3.ebuild

diff --git a/virtual/opencl/opencl-3.ebuild b/virtual/opencl/opencl-3.ebuild
new file mode 100644
index 00000000000..9851d1ccbeb
--- /dev/null
+++ b/virtual/opencl/opencl-3.ebuild
@@ -0,0 +1,31 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit multilib-build
+
+DESCRIPTION="Virtual for OpenCL API"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+
+RDEPEND="app-eselect/eselect-opencl
+	dev-libs/ocl-icd[khronos-headers,${MULTILIB_USEDEP}]"
+
+pkg_postinst() {
+	elog
+	elog "In order to take advantage of OpenCL you will need a runtime for your hardware."
+	elog "Currently included in Gentoo are:"
+	elog
+	elog "    dev-libs/intel-neo - integrated Intel GPUs from Broadwell onwards. Open. 64-bit only"
+	elog "    dev-libs/rocm-opencl-runtime - AMD GPUs supported by the amdgpu kernel driver. Mostly open [1]. 64-bit only"
+	elog "    media-libs/mesa[opencl] - some older AMD GPUs; see [2]. Open. 32-bit support"
+	elog "    dev-libs/amdgpu-pro-opencl - AMD Polaris GPUs. Proprietary, provided as-is. 32-bit support"
+	elog "    dev-util/intel-ocl-sdk - Intel CPUs. Proprietary. 64-bit only"
+	elog "    x11-drivers/nvidia-drivers[uvm] - Nvidia GPUs; specific package versions required for older ones [3]. Proprietary. 32-bit support"
+	elog
+	elog " [1] Proprietary library from dev-libs/hsa-ext-rocr required for image support"
+	elog " [2] https://dri.freedesktop.org/wiki/GalliumCompute/"
+	elog " [3] https://www.nvidia.com/en-us/drivers/unix/legacy-gpu/"
+	elog
+}
-- 
2.24.1