cmake: Update ARMPL properties

  - Ensure that libgfortran and libm are pulled in when
    linking against KokkosKernels::ARMPL.
  - Update CheckHostBlasReturnComplex to use properties of
    KokkosKernels::ARMPL.

src: Link kokkoskernels against KokkosKernels::ARMPL.

CheckHostBlasReturnComplex.cmake

@@ -5,7 +5,12 @@ FUNCTION(CHECK_HOST_BLAS_RETURN_COMPLEX VARNAME)
   IF (KOKKOSKERNELS_HAS_TRILINOS)
     SET(CMAKE_REQUIRED_LIBRARIES ${TPL_BLAS_LIBRARIES})
   ELSE()
-    SET(CMAKE_REQUIRED_LIBRARIES ${BLAS_LIBRARIES})
+    # For TPLs, just pull out the required libraries from the target properies.
+    IF (KOKKOSKERNELS_ENABLE_TPL_ARMPL)
+      GET_TARGET_PROPERTY(CMAKE_REQUIRED_LIBRARIES KokkosKernels::ARMPL INTERFACE_LINK_LIBRARIES)
+    ELSE()
+      SET(CMAKE_REQUIRED_LIBRARIES ${BLAS_LIBRARIES})
+    ENDIF()
   ENDIF()
 
   SET(SOURCE

cmake/Modules/FindTPLARMPL.cmake

@@ -39,9 +39,9 @@ TRY_COMPILE(KOKKOSKERNELS_TRY_COMPILE_ARMPL
 IF(NOT KOKKOSKERNELS_TRY_COMPILE_ARMPL)
   MESSAGE(FATAL_ERROR "KOKKOSKERNELS_TRY_COMPILE_ARMPL_OUT=${KOKKOSKERNELS_TRY_COMPILE_ARMPL_OUT}")
 ELSE()
-  # Check with Jeremy. It looks like the defacto standard is to
-  # have the user set BLAS_LIBRARIES. However, we've done the work
-  # of finding the armpl blas lib here, so let's go ahead and set it
-  # in BLAS_LIBRARIES.
-  SET(BLAS_LIBRARIES "${ARMPL_LIB};gfortran;amath;m")
+  # KokkosKernels::ARMPL is an alias to the ARMPL target.
+  # Let's add in the libgfortran and libm dependencies for users here.
+  GET_TARGET_PROPERTY(ARMPL_INTERFACE_LINK_LIBRARIES KokkosKernels::ARMPL INTERFACE_LINK_LIBRARIES)
+  SET(ARMPL_INTERFACE_LINK_LIBRARIES "${ARMPL_INTERFACE_LINK_LIBRARIES};-lgfortran;-lm")
+  SET_TARGET_PROPERTIES(ARMPL PROPERTIES INTERFACE_LINK_LIBRARIES "${ARMPL_INTERFACE_LINK_LIBRARIES}")
 ENDIF()

src/CMakeLists.txt

@@ -437,4 +437,5 @@ KOKKOSKERNELS_LINK_TPL(kokkoskernels PUBLIC MKL)
 KOKKOSKERNELS_LINK_TPL(kokkoskernels PUBLIC CUBLAS)
 KOKKOSKERNELS_LINK_TPL(kokkoskernels PUBLIC CUSPARSE)
 KOKKOSKERNELS_LINK_TPL(kokkoskernels PUBLIC METIS)
+KOKKOSKERNELS_LINK_TPL(kokkoskernels PUBLIC ARMPL)
 # Not yet here KOKKOSKERNELS_LINK_TPL(kokkoskernels PUBLIC MAGMA)