/NAMES=option D=/NAMES=UPPERCASE

 /NAMES

 Specifies how the compiler treats the case of identifiers and how
 it represents external (global) names to the linker.  HP
 recommends using the ATTRIBUTES ALIAS directive rather than /NAMES
 to specify the form of external names.

 UPPERCASE
   Tells the compiler to ignore case differences in identifiers and
   to convert external names to uppercase.  This is the default.

 LOWERCASE
   Tells the compiler to ignore case differences in identifiers and
   to convert external names to lowercase.

 AS_IS
   Tells the compiler to recognize and distinguish case differences
   in identifiers, including the names of NAMELIST groups and
   variables in those groups, and to preserve the case of external
   names.  This option also prevents the compiler from recognizing
   intrinsic functions unless they are specified in uppercase.