blas lookup for older win versions

Author: galabovaa

cmake/FindHipoDeps.cmake

@@ -3,7 +3,19 @@ set(BLAS_ROOT "" CACHE STRING "Root directory of BLAS or OpenBLAS")
 message(STATUS "BLAS_ROOT is " ${BLAS_ROOT})
 
 if (WIN32)
-    find_package(OpenBLAS CONFIG REQUIRED)
+    if (NOT (BLAS_ROOT STREQUAL ""))
+        message(STATUS "Looking for blas in " ${BLAS_ROOT})
+        set(OpenBLAS_ROOT ${BLAS_ROOT})
+        find_package(OpenBLAS CONFIG NO_DEFAULT_PATH)
+
+        if(OpenBLAS_FOUND)
+            message(STATUS "OpenBLAS CMake config path: ${metis_DIR}")
+        else()
+            find_package(OpenBLAS CONFIG REQUIRED)
+            if(OpenBLAS_FOUND)
+                message(STATUS "OpenBLAS CMake config path: ${metis_DIR}")
+            endif()
+        endif()
     message(STATUS "OpenBLAS CMake config path: ${OpenBLAS_DIR}")
 elseif(NOT APPLE)
     # LINUX