Found the following significant warnings:
  DeformationField.cpp:57:40: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
  reg-lib/cpu/_reg_localTrans.cpp:1448:36: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
  reg-lib/cpu/_reg_localTrans.cpp:3755:36: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
  reg-lib/cpu/_reg_localTrans.cpp:3791:33: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
  reg-lib/cpu/_reg_localTrans.cpp:3915:36: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
  reg-lib/cpu/_reg_localTrans.cpp:3925:41: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
  reg-lib/cpu/_reg_localTrans.cpp:3964:36: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
  reg-lib/cpu/_reg_localTrans_jac.cpp:2536:36: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
  reg-lib/cpu/_reg_tools.cpp:2879:23: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
  reg-lib/cpu/_reg_tools.cpp:2881:23: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
  reg-lib/cpu/_reg_tools.cpp:3025:23: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
  reg-lib/cpu/_reg_tools.cpp:3027:23: warning: comparison of floating-point type ‘float’ with enumeration type ‘NREG_TRANS_TYPE’ is deprecated [-Wdeprecated-enum-float-conversion]
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/RNiftyReg.Rcheck/00install.out’ for details.
* used C++ compiler: ‘g++-15 (Debian 15.2.0-13) 15.2.0’