fix OpenCL compatibility

- enforce that only host side OpenCl 1.2 functions are used if the miner is compiled with `XMR-STAK_COMPILE=generic`
- update documentation
- add CMake option `XMR-STAK_COMPILE` to windows

CMakeLists.txt

@@ -39,15 +39,18 @@ set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "${BUILD_TYPE}")
 set(XMR-STAK_CURRENCY "all" CACHE STRING "select miner currency")
 set_property(CACHE XMR-STAK_CURRENCY PROPERTY STRINGS "all;monero;aeon")
 
-if(NOT CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
-    set(XMR-STAK_COMPILE "native" CACHE STRING "select CPU compute architecture")
-    set_property(CACHE XMR-STAK_COMPILE PROPERTY STRINGS "native;generic")
-    if("${XMR-STAK_COMPILE}" STREQUAL "native")
+
+set(XMR-STAK_COMPILE "native" CACHE STRING "select CPU compute architecture")
+set_property(CACHE XMR-STAK_COMPILE PROPERTY STRINGS "native;generic")
+if("${XMR-STAK_COMPILE}" STREQUAL "native")
+    if(NOT CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
         set(CMAKE_CXX_FLAGS "-march=native -mtune=native ${CMAKE_CXX_FLAGS}")
         set(CMAKE_C_FLAGS "-march=native -mtune=native ${CMAKE_C_FLAGS}")
-    elseif(NOT "${XMR-STAK_COMPILE}" STREQUAL "generic")
-        message(FATAL_ERROR "XMR-STAK_COMPILE is set to an unknown value '${XMR-STAK_COMPILE}'")
     endif()
+elseif("${XMR-STAK_COMPILE}" STREQUAL "generic")
+    add_definitions("-DCONF_ENFORCE_OpenCL_1_2=1")
+else()
+    message(FATAL_ERROR "XMR-STAK_COMPILE is set to an unknown value '${XMR-STAK_COMPILE}'")
 endif()
 
 if("${XMR-STAK_CURRENCY}" STREQUAL "all")

doc/compile.md

@@ -37,7 +37,7 @@ After the configuration you need to compile the miner, follow the guide for your
   - you can find the binary and the `config.txt` file after `make install` in `$HOME/xmr-stak-cpu/bin`
 - `CMAKE_LINK_STATIC` link libgcc and libstdc++ libraries static (default OFF)
   - disable with `cmake .. -DCMAKE_LINK_STATIC=ON`
-  - if you use static compile to run the miner on another system set `-DXMR-STAK_COMPILE=generic` (only available for LINUX, BSD and MacOSX)
+  - if you use static compile to run the miner on another system set `-DXMR-STAK_COMPILE=generic`
 - `CMAKE_BUILD_TYPE` set the build type
   - valid options: `Release` or `Debug`
   - you should always keep `Release` for your productive miners
@@ -46,8 +46,6 @@ After the configuration you need to compile the miner, follow the guide for your
 - `OpenSSL_ENABLE` allow to disable/enable the dependency *OpenSSL*
   - it is not possible to connect to a *https* secured pool if option is disabled: `cmake .. -DOpenSSL_ENABLE=OFF`
 - `XMR-STAK_CURRENCY` - compile for Monero(XMR) or Aeon(AEON) usage only e.g. `cmake .. -DXMR-STAK_CURRENCY=monero`
-
-### only available for LINUX, BSD and MacOSX
 - `XMR-STAK_COMPILE` select the CPU compute architecture (default: native)
   - native means the miner binary can be used only on the system where it is compiled but will archive the highest hash rate
   - use `cmake .. -DXMR-STAK_COMPILE=generic` to run the miner on all CPU's with sse2

xmrstak/backend/amd/amd_gpu/gpu.cpp

@@ -172,7 +172,7 @@ const char* err_to_str(cl_int ret)
 		return "CL_INVALID_LINKER_OPTIONS";
 	case CL_INVALID_DEVICE_PARTITION_COUNT:
 		return "CL_INVALID_DEVICE_PARTITION_COUNT";
-#ifdef CL_VERSION_2_0
+#if defined(CL_VERSION_2_0) && !defined(CONF_ENFORCE_OpenCL_1_2)
 	case CL_INVALID_PIPE_SIZE:
 		return "CL_INVALID_PIPE_SIZE";
 	case CL_INVALID_DEVICE_QUEUE:
@@ -227,7 +227,7 @@ size_t InitOpenCLGpu(cl_context opencl_ctx, GpuContext* ctx, const char* source_
 	}
 
 	printer::inst()->print_msg(L1,"Device %lu work size %lu / %lu.", ctx->deviceIdx, ctx->workSize, MaximumWorkSize);
-#ifdef CL_VERSION_2_0
+#if defined(CL_VERSION_2_0) && !defined(CONF_ENFORCE_OpenCL_1_2)
 	const cl_queue_properties CommandQueueProperties[] = { 0, 0, 0 };
 	ctx->CommandQueues = clCreateCommandQueueWithProperties(opencl_ctx, ctx->DeviceID, CommandQueueProperties, &ret);
 #else