Found the following significant warnings:
  pvt_interface.cpp:72:9: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:74:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:76:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:82:9: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:86:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:89:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:194:9: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:196:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:198:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:204:9: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:208:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:211:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:384:9: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:386:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:388:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:394:9: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:398:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
  pvt_interface.cpp:401:16: warning: use of bitwise '&' with boolean operands [-Wbitwise-instead-of-logical]
See '/home/hornik/tmp/R.check/r-devel-clang/Work/PKGS/Rpvt.Rcheck/00install.out' for details.