build fixes and instructions for OpenCL in windows

build-cl.cmd

@@ -0,0 +1,31 @@
+rd /s build
+
+rem set MSBuild="C:\Program Files (x86)\MSBuild\14.0\Bin\MSBuild.exe"
+set MSBuild="C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\MSBuild\15.0\Bin\MSBuild.exe"
+
+rem call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" amd64
+call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat" amd64
+
+meson.py build --backend vs2017 --buildtype release ^
+-Dmkl_include="C:\Program Files (x86)\IntelSWTools\compilers_and_libraries\windows\mkl\include" ^
+-Dmkl_libdirs="C:\Program Files (x86)\IntelSWTools\compilers_and_libraries\windows\mkl\lib\intel64" ^
+-Dopencl_libdirs="C:\Program Files (x86)\AMD APP SDK\3.0\lib\x86_64" ^
+-Dopencl_include="C:\Program Files (x86)\AMD APP SDK\3.0\include" ^
+-Ddefault_library=static
+
+pause
+
+cd build
+
+%MSBuild% /p:Configuration=Release /p:Platform=x64 ^
+/p:PreferredToolArchitecture=x64 "subprojects\zlib-1.2.11\Windows resource for file 'win32_zlib1.rc'@cus.vcxproj" ^
+/filelogger
+
+%MSBuild% /p:Configuration=Release /p:Platform=x64 ^
+/p:PreferredToolArchitecture=x64 subprojects\zlib-1.2.11\subprojects@zlib-1.2.11@@z@sta.vcxproj ^
+/filelogger
+
+%MSBuild% /p:Configuration=Release /p:Platform=x64 ^
+/p:PreferredToolArchitecture=x64 lc0@exe.vcxproj ^
+/filelogger
+

meson.build

@@ -204,6 +204,9 @@ if get_option('build_backends')
         opencl_files += 'src/neural/blas/transforms.cc'
       endif
 
+      deps += dependency('boost', required: true)
+
+      includes += include_directories(get_option('opencl_include'))
       files += opencl_files
       has_backends = true
     else

meson_options.txt

@@ -8,6 +8,11 @@ option('openblas_include',
        value: ['/usr/include/openblas/'],
        description: 'Paths to openblas include directories')
 
+option('opencl_include',
+       type: 'array',
+       value: ['/usr/include/'],
+       description: 'Paths to OpenCL include directories')
+
 option('tensorflow_libdir',
        type: 'array',
        value: ['/usr/local/lib/tensorflow_cc/'],

windows_build.md

@@ -0,0 +1,39 @@
+## Windows MKL/OpenCL
+
+0. Install Microsoft Visual Studio. For vs2017 make sure the option "Desktop development with C++"
+   is installed (you can add it if not)
+
+1. Install git for windows - this can be used to get lc0 but also needed for meson
+
+2. Install MKL - dont forget to run `mklvars.bat intel64` to set up the paths to the dlls
+
+3. For OpenCL you also need to install:
+   * Boost
+   * OpenCL libraries
+
+4. Install Python3 - be sure to check the box to add python to the path
+
+5. Install Meson: `pip3 install --upgrade meson`
+
+6. Edit `build-cl.cmd`:
+
+*  If you use MSVS other than 2017 community edition (or if it's installed into non-standard location)
+   replace the path to vcvarsall.bat and MSBuild.exe. If you can't find vcvarsall.bat on VS2017, you
+   need to install option "Desktop development with C++". Some example paths are in comments.
+*  `--backend 2017` replace 2017 with the correct version.
+*  `mkl_include` and `mkl_libdirs` should point to the MKL include and lib directories
+*  If building with OpenCL `opencl_libdirs` and `opencl_include` should point to the OpenCL include and
+   lib directories. The include directory is the one with the `CL` directory containing `opencl.h`, not
+   directly the one containing `opencl.h`.
+
+7. Run `build-cl.cmd`. It will generate MSVS project and pause.
+
+8. Hit <Enter> to build it.
+
+9. Resulting binary will be `build/lc0.exe`
+
+Alternatively you can
+
+8. open generated solution `build/lc0.sln` in Visual Studio and build yourself.
+
+