some fixes

- add legacy option for mkl
- make openmp dependent to both mkl and mkl_legacy
- export mkl_legacy option in cmake module

CMakeLists.txt

@@ -34,7 +34,8 @@ endif()
 
 option(BUILD_SHARED_LIBS "Build shared libraries." ON)
 option(DLAF_WITH_OPENMP "${DLAF_WITH_OPENMP_DESCRIPTION}" ${DLAF_WITH_OPENMP_DEFAULT})
-option(DLAF_WITH_MKL "Enable MKL as provider for LAPACK" OFF)
+option(DLAF_WITH_MKL "Enable oneMKL as provider for LAPACK" OFF)
+option(DLAF_WITH_MKL_LEGACY "Enable MKL as provider for LAPACK" OFF)
 option(DLAF_WITH_CUDA "Enable CUDA support" OFF)
 option(DLAF_WITH_HIP "Enable HIP support" OFF)
 cmake_dependent_option(DLAF_WITH_CUDA_MPI_RDMA "Enable MPI CUDA RDMA" OFF "DLAF_WITH_CUDA" OFF)
@@ -48,7 +49,11 @@ option(DLAF_BUILD_DOC "Build documentation" OFF)
 option(DLAF_WITH_PRECOMPILED_HEADERS "Use precompiled headers." OFF)
 option(DLAF_WITH_SCALAPACK "Build ScaLAPACK-like C API (requires ScaLAPACK)" OFF)
 
-if(DLAF_WITH_MKL)
+if(DLAF_WITH_MKL AND DLAF_WITH_MKL_LEGACY)
+  message(SEND_ERROR "DLAF_WITH_MKL and DLAF_WITH_MKL_LEGACY are mutually exclusive.")
+endif()
+
+if(DLAF_WITH_MKL OR DLAF_WITH_MKL_LEGACY)
   # When using MKL there is no need to set the number of threads with
   # omp_set_num_threads; it's sufficient to use MKL's own mechanisms.
   set(DLAF_WITH_OPENMP OFF CACHE BOOL "${DLAF_WITH_OPENMP_DESCRIPTION}" FORCE)

cmake/template/DLAFConfig.cmake.in

@@ -20,6 +20,7 @@ list(PREPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_LIST_DIR})
 # ===== VARIABLES
 set(DLAF_WITH_OPENMP @DLAF_WITH_OPENMP@)
 set(DLAF_WITH_MKL @DLAF_WITH_MKL@)
+set(DLAF_WITH_MKL @DLAF_WITH_MKL_LEGACY@)
 set(DLAF_WITH_CUDA @DLAF_WITH_CUDA@)
 set(DLAF_WITH_HIP @DLAF_WITH_HIP@)
 set(DLAF_WITH_GPU @DLAF_WITH_GPU@)