Set LINK_FLAGS for INTERFACE libraries in cmake

I am working on a header-only C++11 library which uses modern CMake. By "modern," I mean not only using CMake v3.0+ but also trying to use as much as possible the best practices in Daniel Pfeifer's talk.

I have done some research on my question, but the answers are mostly regarding modifying the LINK_FLAGS directly in the global level, which I do not want to have. Right now, in my project, I require a minimum version of 3.9.0 of CMake because of some features I am using.

My question is about whether/how to add LINK_FLAGS coming from two of my dependencies: BLAS and LAPACK. Basically, I have the following excerpt from my CMakeLists.txt file:

cmake_minimum_required(VERSION 3.9.0)

project(polo VERSION 1.0.0 LANGUAGES C CXX)

find_package(BLAS REQUIRED)
find_package(LAPACK REQUIRED)

add_library(polo INTERFACE)
add_library(polo::polo ALIAS polo)

target_compile_features(polo INTERFACE cxx_std_11)

target_include_directories(polo
  INTERFACE
    $<BUILD_INTERFACE:${polo_SOURCE_DIR}/include>
    $<INSTALL_INTERFACE:include>
)

target_link_libraries(polo
  INTERFACE
    ${BLAS_LIBRARIES}
    ${LAPACK_LIBRARIES}
)

set_property(
  TARGET
    polo
  PROPERTY LINK_FLAGS
    ${BLAS_LINKER_FLAGS}
    ${LAPACK_LINKER_FLAGS}
)

As far as I can understand from documentations of the FindBLAS and FindLAPACK modules, I need to inform my users at least about {BLAS,LAPACK}_LIBRARIES and {BLAS,LAPACK}_LINKER_FLAGS. For the former, I think I have handled the issue properly. However, for the latter, I need to use either set_target_properties or set_property. Between the two, the latter seems to give me a cleaner solution in that I can use both variables coming from Find{BLAS,LAPACK} modules together. When I try to build my library using the above solution, I get the obvious error:

CMake Error at src/CMakeLists.txt:32 (set_property):
  INTERFACE_LIBRARY targets may only have whitelisted properties.  The
  property "LINK_FLAGS" is not allowed.

My question is two folds:

1. Should I use *_LINKER_FLAGS coming from the modules at all, and,
2. If yes, how should I integrate them cleanly into my CMake project?

As for the 2. above, I have seen some suggestions/answers for using target_link_libraries, but I am not sure whether that is the option to go for.

Thank you for your time!