In non-ANSI mode, there are several HP C specific macro names
defined. These names may conflict with identifiers used in the source
code.
The HP 9000 workstation and server preprocessors predefine
the macro names PWB,
hpux, and unix.
The HP 9000 workstations and servers predefine the macro name hp9000s800;
the HP 9000 Series 500 predefines hp9000s500;
and the HP 9000 Series 300/400 predefine the macro name hp9000s300.
The VAX predefines the macro name vax.
If any of these macro names is used as an identifier in the source
code, use the #undef
preprocessor directive to "undefine" the macro or rename the identifier(s).
In ANSI mode, none of the above macro names are defined and
you should not have difficulty with these HP C specific macro names.
