Package check result: WARNING

Check: whether package can be installed, Result: WARNING
  Found the following significant warnings:
    lib/MUMPS_5.2.1/src/dmumps_ooc.F:234:39: warning: type of ‘mumps_low_level_init_err_str’ does not match original declaration [-Wlto-type-mismatch]
    lib/MUMPS_5.2.1/src/dmumps_ooc.F:534:45: warning: type of ‘mumps_ooc_remove_file_c’ does not match original declaration [-Wlto-type-mismatch]
    lib/MUMPS_5.2.1/src/dmumps_ooc.F:2879:42: warning: type of ‘mumps_ooc_get_file_name_c’ does not match original declaration [-Wlto-type-mismatch]
    lib/MUMPS_5.2.1/src/dmumps_ooc.F:2937:42: warning: type of ‘mumps_ooc_set_file_name_c’ does not match original declaration [-Wlto-type-mismatch]
  See ‘/home/hornik/tmp/CRAN_special_LTO/rmumps.Rcheck/00install.out’ for details.
  Used C compiler: ‘gcc-15 (Debian 15.2.0-14) 15.2.0’
  Used C++ compiler: ‘g++-15 (Debian 15.2.0-14) 15.2.0’