constants["NC_NAT"] = NC_NAT;
  constants["NC_BYTE"] = NC_BYTE;
  constants["NC_CHAR"] = NC_CHAR;
  constants["NC_SHORT"] = NC_SHORT;
  constants["NC_INT"] = NC_INT;
  constants["NC_LONG"] = NC_LONG;
  constants["NC_FLOAT"] = NC_FLOAT;
  constants["NC_DOUBLE"] = NC_DOUBLE;
  constants["NC_UBYTE"] = NC_UBYTE;
  constants["NC_USHORT"] = NC_USHORT;
  constants["NC_UINT"] = NC_UINT;
  constants["NC_INT64"] = NC_INT64;
  constants["NC_UINT64"] = NC_UINT64;
  constants["NC_STRING"] = NC_STRING;
  constants["NC_VLEN"] = NC_VLEN;
  constants["NC_OPAQUE"] = NC_OPAQUE;
  constants["NC_ENUM"] = NC_ENUM;
  constants["NC_COMPOUND"] = NC_COMPOUND;
  constants["NC_FILL_BYTE"] = NC_FILL_BYTE;
  constants["NC_FILL_CHAR"] = NC_FILL_CHAR;
  constants["NC_FILL_SHORT"] = NC_FILL_SHORT;
  constants["NC_FILL_INT"] = NC_FILL_INT;
  constants["NC_FILL_FLOAT"] = NC_FILL_FLOAT;
  constants["NC_FILL_DOUBLE"] = NC_FILL_DOUBLE;
  constants["NC_FILL_UBYTE"] = NC_FILL_UBYTE;
  constants["NC_FILL_USHORT"] = NC_FILL_USHORT;
  constants["NC_FILL_UINT"] = NC_FILL_UINT;
  constants["NC_FILL_INT64"] = NC_FILL_INT64;
  constants["NC_FILL_UINT64"] = NC_FILL_UINT64;
  constants["NC_MAX_BYTE"] = NC_MAX_BYTE;
  constants["NC_MIN_BYTE"] = NC_MIN_BYTE;
  constants["NC_MAX_CHAR"] = NC_MAX_CHAR;
  constants["NC_MAX_SHORT"] = NC_MAX_SHORT;
  constants["NC_MIN_SHORT"] = NC_MIN_SHORT;
  constants["NC_MAX_INT"] = NC_MAX_INT;
  constants["NC_MIN_INT"] = NC_MIN_INT;
  constants["NC_MAX_FLOAT"] = NC_MAX_FLOAT;
  constants["NC_MIN_FLOAT"] = NC_MIN_FLOAT;
  constants["NC_MAX_DOUBLE"] = NC_MAX_DOUBLE;
  constants["NC_MIN_DOUBLE"] = NC_MIN_DOUBLE;
  constants["NC_MAX_UBYTE"] = NC_MAX_UBYTE;
  constants["NC_MAX_USHORT"] = NC_MAX_USHORT;
  constants["NC_MAX_UINT"] = NC_MAX_UINT;
  constants["NC_MAX_INT64"] = NC_MAX_INT64;
  constants["NC_MIN_INT64"] = NC_MIN_INT64;
  constants["NC_MAX_UINT64"] = NC_MAX_UINT64;
  constants["NC_FILL"] = NC_FILL;
  constants["NC_NOFILL"] = NC_NOFILL;
  constants["NC_NOWRITE"] = NC_NOWRITE;
  constants["NC_WRITE"] = NC_WRITE;
  constants["NC_CLOBBER"] = NC_CLOBBER;
  constants["NC_NOCLOBBER"] = NC_NOCLOBBER;
  constants["NC_64BIT_OFFSET"] = NC_64BIT_OFFSET;
  constants["NC_NETCDF4"] = NC_NETCDF4;
  constants["NC_CLASSIC_MODEL"] = NC_CLASSIC_MODEL;
  constants["NC_SHARE"] = NC_SHARE;
  constants["NC_MPIIO"] = NC_MPIIO;
  constants["NC_MPIPOSIX"] = NC_MPIPOSIX;
  constants["NC_PNETCDF"] = NC_PNETCDF;
  constants["NC_LOCK"] = NC_LOCK;
  constants["NC_FORMAT_CLASSIC"] = NC_FORMAT_CLASSIC;
  constants["NC_FORMAT_64BIT"] = NC_FORMAT_64BIT;
  constants["NC_FORMAT_NETCDF4"] = NC_FORMAT_NETCDF4;
  constants["NC_FORMAT_NETCDF4_CLASSIC"] = NC_FORMAT_NETCDF4_CLASSIC;
  constants["NC_SIZEHINT_DEFAULT"] = NC_SIZEHINT_DEFAULT;
  constants["NC_ALIGN_CHUNK"] = NC_ALIGN_CHUNK;
  constants["NC_UNLIMITED"] = NC_UNLIMITED;
  constants["NC_GLOBAL"] = NC_GLOBAL;
  constants["NC_MAX_DIMS"] = NC_MAX_DIMS;
  constants["NC_MAX_ATTRS"] = NC_MAX_ATTRS;
  constants["NC_MAX_VARS"] = NC_MAX_VARS;
  constants["NC_MAX_NAME"] = NC_MAX_NAME;
  constants["NC_MAX_VAR_DIMS"] = NC_MAX_VAR_DIMS;
  constants["NC_ENDIAN_NATIVE"] = NC_ENDIAN_NATIVE;
  constants["NC_ENDIAN_LITTLE"] = NC_ENDIAN_LITTLE;
  constants["NC_ENDIAN_BIG"] = NC_ENDIAN_BIG;
  constants["NC_CHUNKED"] = NC_CHUNKED;
  constants["NC_CONTIGUOUS"] = NC_CONTIGUOUS;
  constants["NC_NOCHECKSUM"] = NC_NOCHECKSUM;
  constants["NC_FLETCHER32"] = NC_FLETCHER32;
  constants["NC_NOSHUFFLE"] = NC_NOSHUFFLE;
  constants["NC_SHUFFLE"] = NC_SHUFFLE;
  constants["NC_NOERR"] = NC_NOERR;
  constants["NC_EBADID"] = NC_EBADID;
  constants["NC_ENFILE"] = NC_ENFILE;
  constants["NC_EEXIST"] = NC_EEXIST;
  constants["NC_EINVAL"] = NC_EINVAL;
  constants["NC_EPERM"] = NC_EPERM;
  constants["NC_ENOTINDEFINE"] = NC_ENOTINDEFINE;
  constants["NC_EINDEFINE"] = NC_EINDEFINE;
  constants["NC_EINVALCOORDS"] = NC_EINVALCOORDS;
  constants["NC_EMAXDIMS"] = NC_EMAXDIMS;
  constants["NC_ENAMEINUSE"] = NC_ENAMEINUSE;
  constants["NC_ENOTATT"] = NC_ENOTATT;
  constants["NC_EMAXATTS"] = NC_EMAXATTS;
  constants["NC_EBADTYPE"] = NC_EBADTYPE;
  constants["NC_EBADDIM"] = NC_EBADDIM;
  constants["NC_EUNLIMPOS"] = NC_EUNLIMPOS;
  constants["NC_EMAXVARS"] = NC_EMAXVARS;
  constants["NC_ENOTVAR"] = NC_ENOTVAR;
  constants["NC_EGLOBAL"] = NC_EGLOBAL;
  constants["NC_ENOTNC"] = NC_ENOTNC;
  constants["NC_ESTS"] = NC_ESTS;
  constants["NC_EMAXNAME"] = NC_EMAXNAME;
  constants["NC_EUNLIMIT"] = NC_EUNLIMIT;
  constants["NC_ENORECVARS"] = NC_ENORECVARS;
  constants["NC_ECHAR"] = NC_ECHAR;
  constants["NC_EEDGE"] = NC_EEDGE;
  constants["NC_ESTRIDE"] = NC_ESTRIDE;
  constants["NC_EBADNAME"] = NC_EBADNAME;
  constants["NC_ERANGE"] = NC_ERANGE;
  constants["NC_ENOMEM"] = NC_ENOMEM;
  constants["NC_EVARSIZE"] = NC_EVARSIZE;
  constants["NC_EDIMSIZE"] = NC_EDIMSIZE;
  constants["NC_ETRUNC"] = NC_ETRUNC;
  constants["NC_EAXISTYPE"] = NC_EAXISTYPE;
  constants["NC_EDAP"] = NC_EDAP;
  constants["NC_ECURL"] = NC_ECURL;
  constants["NC_EIO"] = NC_EIO;
  constants["NC_ENODATA"] = NC_ENODATA;
  constants["NC_EDAPSVC"] = NC_EDAPSVC;
  constants["NC_EDAS"] = NC_EDAS;
  constants["NC_EDDS"] = NC_EDDS;
  constants["NC_EDATADDS"] = NC_EDATADDS;
  constants["NC_EDAPURL"] = NC_EDAPURL;
  constants["NC_EDAPCONSTRAINT"] = NC_EDAPCONSTRAINT;
  constants["NC_EHDFERR"] = NC_EHDFERR;
  constants["NC_ECANTREAD"] = NC_ECANTREAD;
  constants["NC_ECANTWRITE"] = NC_ECANTWRITE;
  constants["NC_ECANTCREATE"] = NC_ECANTCREATE;
  constants["NC_EFILEMETA"] = NC_EFILEMETA;
  constants["NC_EDIMMETA"] = NC_EDIMMETA;
  constants["NC_EATTMETA"] = NC_EATTMETA;
  constants["NC_EVARMETA"] = NC_EVARMETA;
  constants["NC_ENOCOMPOUND"] = NC_ENOCOMPOUND;
  constants["NC_EATTEXISTS"] = NC_EATTEXISTS;
  constants["NC_ENOTNC4"] = NC_ENOTNC4;
  constants["NC_ESTRICTNC3"] = NC_ESTRICTNC3;
  constants["NC_ENOTNC3"] = NC_ENOTNC3;
  constants["NC_ENOPAR"] = NC_ENOPAR;
  constants["NC_EPARINIT"] = NC_EPARINIT;
  constants["NC_EBADGRPID"] = NC_EBADGRPID;
  constants["NC_EBADTYPID"] = NC_EBADTYPID;
  constants["NC_ETYPDEFINED"] = NC_ETYPDEFINED;
  constants["NC_EBADFIELD"] = NC_EBADFIELD;
  constants["NC_EBADCLASS"] = NC_EBADCLASS;
  constants["NC_EMAPTYPE"] = NC_EMAPTYPE;
  constants["NC_ELATEFILL"] = NC_ELATEFILL;
  constants["NC_ELATEDEF"] = NC_ELATEDEF;
  constants["NC_EDIMSCALE"] = NC_EDIMSCALE;
  constants["NC_ENOGRP"] = NC_ENOGRP;
  constants["NC_ESTORAGE"] = NC_ESTORAGE;
  constants["NC_EBADCHUNK"] = NC_EBADCHUNK;
  constants["NC_ENOTBUILT"] = NC_ENOTBUILT;
  constants["NC_HAVE_NEW_CHUNKING_API"] = NC_HAVE_NEW_CHUNKING_API;
  constants["NC_INDEPENDENT"] = NC_INDEPENDENT;
  constants["NC_COLLECTIVE"] = NC_COLLECTIVE;
  constants["NC_ENTOOL"] = NC_ENTOOL;
  constants["NC_EXDR"] = NC_EXDR;
  constants["NC_SYSERR"] = NC_SYSERR;
  constants["NC_FATAL"] = NC_FATAL;
  constants["NC_VERBOSE"] = NC_VERBOSE;