Test: Fix FindMKL.cmake, which causes *** No rule to make target 'mkl_scalapack_lp64', needed by 'abacus'. when compiling with intel.

Author: sunliang98

cmake/FindMKL.cmake

@@ -91,5 +91,12 @@ endif()
 if(NOT TARGET MKL::MKL_SCALAPACK)
   find_library(MKL_SCALAPACK NAMES mkl_scalapack_lp64 HINTS ${MKLROOT}/lib ${MKLROOT}/lib/intel64)
   message(STATUS "Found MKL_SCALAPACK: ${MKL_SCALAPACK}")
-  add_library(MKL::MKL_SCALAPACK OBJECT IMPORTED MKL_SCALAPACK)
+  if(MKL_SCALAPACK)
+    # create an IMPORTED target that points to the discovered library file
+    add_library(MKL::MKL_SCALAPACK UNKNOWN IMPORTED)
+    set_target_properties(MKL::MKL_SCALAPACK PROPERTIES
+      IMPORTED_LOCATION "${MKL_SCALAPACK}"
+      INTERFACE_INCLUDE_DIRECTORIES "${MKL_INCLUDE}"
+    )
+  endif()
 endif()