signed char', 8 bit unsigned integral type.

'-6'
     'signed char', 8 bit signed integral type.

'-7'
     'unsigned short', 16 bit unsigned integral type.

'-8'
     'unsigned int', 32 bit unsigned integral type.

'-9'
     'unsigned', 32 bit unsigned integral type.

'-10'
     'unsigned long', 32 bit unsigned integral type.

'-11'
     'void', type indicating the lack of a value.

'-12'
     'float', IEEE single precision.

'-13'
     'double', IEEE double precision.

'-14'
     'long double', IEEE double precision.  The compiler claims the size
     will increase in a future release, and for binary compatibility you
     have to avoid using 'long double'.  I hope when they increase it
     they use a new negative type number.

'-15'
     'integer'.  32 bit signed integral type.

'-16'
     'boolean'.  32 bit type.  GDB and GCC assume that zero is false,
     one is true, and other values have unspecified meaning.  I hope
     this agrees with how the IBM tools use the type.

'-17'
     'short real'.  IEEE single precision.

'-18'
     'real'.  IEEE double precision.

'-19'
     'stringptr'.  *Note Strings::.

'-20'
     'character', 8 bit unsigned character type.

'-21'
     'logical*1', 8 bit type.  This Fortran type has a split personality
     in that it is used for boolean variables, but can also be used for
     unsigned integers.  0 is false, 1 is true, and other values are
     non-boolean.

'-22'
     'logical*2', 16 bit type.  This Fortran type has a split
     personality in that it is used for boolean variables, but can also
     be used for unsigned integers.  0 is false, 1 is true, and other
     values are non-boolean.

'-23'
     'logical*4', 32 bit type.  This Fortran type has a split
     personality in that it is used for boolean variables, but can also
     be used for unsigned integers.  0 is false, 1 is true, and other
     values are non-boolean.

'-24'
     'logical', 32 bit type.  This Fortran type has a split personality
     in that it is used for boolean variables, but can also be used for
     unsigned integers.  0 is false, 1 is true, and other values are
     non-boolean.

'-25'
     'complex'.  A complex type consisting of two IEEE single-precision
     floating point values.

'-26'
     'complex'.  A complex type consisting of two IEEE double-precision
     floating point values.

'-27'
     'integer*1', 8 bit signed integral type.

'-28'
     'integer*2', 16 bit signed integral type.

'-29'
     'integer*4', 32 bit signed integral type.

'-30'
     'wchar'.  Wide character, 16 bits wide, unsigned (what format?
     Unicode?).

'-31'
     'long long', 64 bit signed integral type.

'-32'
     'unsigned long long', 64 bit unsigned integral type.

'-33'
     'logical*8', 64 bit unsigned integral type.

'-34'
     'integer*8', 64 bit signed integral type.