Set blas cmake options also with PARENT_SCOPE

This is required for the update value to be visible
in a dependent project including generic blas using
FetchContent.

Author: rafbiels

onemath/sycl/blas/CMakeLists.txt

@@ -70,10 +70,16 @@ if (SYCL_COMPILER MATCHES "adaptivecpp" OR ${CMAKE_CXX_COMPILER} MATCHES "acpp|s
   if(BLAS_ENABLE_COMPLEX)
     message(STATUS "SYCL Complex data is not supported on AdaptiveCpp/hipSYCL. Complex data type is disabled")
     set(BLAS_ENABLE_COMPLEX OFF)
+    if (NOT ${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_SOURCE_DIR})
+      set(BLAS_ENABLE_COMPLEX OFF PARENT_SCOPE)
+    endif()
   endif()
   if (BLAS_ENABLE_USM)
     message(STATUS "USM API is not supported on AdaptiveCpp/hipSYCL. USM API is disabled")
     set(BLAS_ENABLE_USM OFF)
+    if (NOT ${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_SOURCE_DIR})
+      set(BLAS_ENABLE_USM OFF PARENT_SCOPE)
+    endif()
   endif()
 endif()