Merge pull request ethereum-mining#2032 from ianzur/sys-openCL-config…

…-option

ENH: config option to use system OpenCL (for ROCm users)

CMakeLists.txt

@@ -31,6 +31,7 @@ option(ETHDBUS "Build with D-Bus support" OFF)
 option(APICORE "Build with API Server support" ON)
 option(BINKERN "Install AMD binary kernels" ON)
 option(DEVBUILD "Log developer metrics" OFF)
+option(USE_SYS_OPENCL "Build with system OpenCL" OFF)
 
 # propagates CMake configuration options to the compiler
 function(configureProject)
@@ -55,6 +56,9 @@ function(configureProject)
     if (DEVBUILD)
         add_definitions(-DDEV_BUILD)
     endif()
+    if (USE_SYS_OPENCL)
+        add_definitions(-DUSE_SYS_OPENCL)
+    endif()
 endfunction()
 
 hunter_add_package(Boost COMPONENTS system filesystem thread)
@@ -68,6 +72,10 @@ find_package(ethash CONFIG REQUIRED)
 
 configureProject()
 
+if(APPLE)
+    set(USE_SYS_OPENCL ON)
+endif()
+
 message("----------------------------------------------------------------------------")
 message("-- CMake ${CMAKE_VERSION}")
 message("-- Build ${CMAKE_BUILD_TYPE} / ${CMAKE_SYSTEM_NAME}")
@@ -79,6 +87,7 @@ message("-- ETHDBUS          Build D-Bus components                       ${ETHD
 message("-- APICORE          Build API Server components                  ${APICORE}")
 message("-- BINKERN          Install AMD binary kernels                   ${BINKERN}")
 message("-- DEVBUILD         Build with dev logging                       ${DEVBUILD}")
+message("-- USE_SYS_OPENCL   Build with system OpenCL                     ${USE_SYS_OPENCL}")
 message("----------------------------------------------------------------------------")
 message("")
 
@@ -87,7 +96,6 @@ if(UNIX AND NOT APPLE)
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libstdc++")
 endif()
 
-
 cable_add_buildinfo_library(PROJECT_NAME ${PROJECT_NAME})
 
 add_subdirectory(libdevcore)

docs/BUILD.md

@@ -43,6 +43,8 @@ you have to install the OpenGL libraries. E.g. on Ubuntu run:
 sudo apt-get install mesa-common-dev
 ```
 
+If you want to use locally installed [ROCm-OpenCL](https://rocmdocs.amd.com/en/latest/) package, use build flag `-DUSE_SYS_OPENCL=ON` with cmake config.
+
 ### macOS
 
 1. GCC version >= TBF
@@ -143,6 +145,7 @@ cmake .. -DETHASHCUDA=ON -DETHASHCL=OFF
 * `-DAPICORE=ON` - enable API Server, `ON` by default.
 * `-DBINKERN=ON` - install AMD binary kernels, `ON` by default.
 * `-DETHDBUS=ON` - enable D-Bus support, `OFF` by default.
+* `-DUSE_SYS_OPENCL=ON` - Use system OpenCL, `OFF` by default, unless on macOS. Specify to use local **ROCm-OpenCL** package.
 
 ## Disable Hunter
 

libethash-cl/CMakeLists.txt

@@ -20,8 +20,8 @@ set(SOURCES
 	${CMAKE_CURRENT_BINARY_DIR}/ethash.h
 )
 
-if(APPLE)
-	# On macOS use system OpenCL library.
+if(USE_SYS_OPENCL)
+	# On macOS or using ROCm-OpenCL, use system OpenCL library.
 	find_package(OpenCL REQUIRED)
 else()
 	hunter_add_package(OpenCL)