Github Actions Windows builds with tests (#472)

* Set CMake CMP0074 policy

* Attempt to use pre-compiled OpenBLAS on Windows CI

* Fix an issue and add some debugging

* Improve FindCBLAS for OpenBLAS on Windows

.github/workflows/build_and_test.yml

@@ -75,13 +75,19 @@ jobs:
       uses: ilammy/msvc-dev-cmd@v1
 
     - name: Install OpenBLAS
-      run: vcpkg.exe --triplet=${{ matrix.config.arch }}-windows install openblas
+      run: |
+        mkdir openblas
+        cd openblas
+        C:\msys64\usr\bin\wget.exe https://github.com/xianyi/OpenBLAS/releases/download/v0.3.23/OpenBLAS-0.3.23-x64.zip
+        7z x OpenBLAS-0.3.23-x64.zip
+        pwd
+        ls
 
     - name: Install OpenCL
       run: vcpkg.exe --triplet=${{ matrix.config.arch }}-windows install opencl
 
     - name: Run CMake
-      run: cmake -S . -B build -DTESTS=ON -DCLIENTS=ON -DSAMPLES=ON -DOPENCL_ROOT=C:/vcpkg/packages/opencl_x64-windows -DCBLAS_ROOT=C:/vcpkg/packages/openblas_x64-windows
+      run: cmake -S . -B build -DTESTS=ON -DCLIENTS=ON -DSAMPLES=ON -DOPENCL_ROOT=C:\vcpkg\packages\opencl_x64-windows -DCBLAS_ROOT=${{ github.workspace }}\openblas
 
     - name: Compile the code
       run: cmake --build build

CMakeLists.txt

@@ -26,6 +26,9 @@ set(clblast_VERSION_PATCH 3)
 set(clblast_VERSION "${clblast_VERSION_MAJOR}.${clblast_VERSION_MINOR}.${clblast_VERSION_PATCH}")
 set(clblast_SOVERSION ${clblast_VERSION_MAJOR})
 
+# Policies
+cmake_policy(SET CMP0074 NEW)  # to make -DCBLAS_ROOT= work with newer CMake versions as well
+
 # Options and their default values
 option(BUILD_SHARED_LIBS "Build a shared (ON) or static library (OFF)" ON)
 option(SAMPLES "Enable compilation of the examples" OFF)

cmake/Modules/FindCBLAS.cmake

@@ -48,11 +48,11 @@ mark_as_advanced(CBLAS_INCLUDE_DIRS)
 
 # Finds the library
 find_library(CBLAS_LIBRARIES
-  NAMES cblas blas blis openblas accelerate
+  NAMES cblas blas blis openblas libopenblas accelerate
   HINTS ${CBLAS_HINTS}
   PATH_SUFFIXES
-    lib lib64 lib/x86_64 lib/x64 lib/x86 lib/Win32 lib/import lib64/import
-    openblas/lib blis/lib lib/atlas-base
+    lib lib64 bin lib/x86_64 lib/x64 lib/x86 lib/Win32 lib/import lib64/import
+    openblas/bin openblas/lib blis/lib lib/atlas-base
   PATHS ${CBLAS_PATHS}
   DOC "Netlib BLAS library"
 )