Found the following significant warnings:
  ../inst/include/mat_umat.h:44:10: warning: the address of 'series' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:44:10: warning: the address of 'kernel' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:71:10: warning: the address of 'frequency' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:98:10: warning: the address of 'frequency' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:44:10: warning: the address of 'threshold' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:44:10: warning: the address of 'um_atoms' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:44:10: warning: the address of 'neighbor_indices' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:71:10: warning: the address of 'cpx_mat' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:98:10: warning: the address of 'cpx_mat' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:123:7: warning: the address of 'deriv1' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:123:7: warning: the address of 'deriv2' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:71:10: warning: the address of 'embedding' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:44:10: warning: the address of 'neig_idx' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:44:10: warning: the address of 'time_stamp' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:98:10: warning: the address of 'sdf_direct' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:44:10: warning: the address of 'unique_lags' will always evaluate as 'true' [-Waddress]
  mat_arit.c:1428:29: warning: the address of 'max_val' will always evaluate as 'true' [-Waddress]
  mat_arit.c:1429:29: warning: the address of 'min_val' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:274:16: warning: the address of 'scalar' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:274:16: warning: the address of 'pad_value' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:123:7: warning: the address of 'cast_mat' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:123:7: warning: the address of 'padded_series' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:123:7: warning: the address of 'dft' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:71:10: warning: the address of 'tmpmat2' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:98:10: warning: the address of 'tmpmat2' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:44:10: warning: the address of 'flat' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:98:10: warning: the address of 'unique_levels' will always evaluate as 'true' [-Waddress]
  ../inst/include/mat_umat.h:44:10: warning: the address of 'acvs' will always evaluate as 'true' [-Waddress]
See 'd:/Rcompile/CRANpkg/local/4.1/MALDIrppa.Rcheck/00install.out' for details.