C/C++ Programmer's Guide (G06.25+)

Compiling, Binding, and Accelerating TNS C++
Programs
HP C/C++ Programmer’s Guide for NonStop Systems—429301-008
15-3
Working in the Guardian Environment
C Preprocessor Cprep
Cprep is a general-purpose C preprocessor. Cprep performs the following functions:
•
Expands all preprocessor directives
•
Uses certain C compiler pragmas and passes the rest to Cfront for the C compiler
•
Generates #line directives specifying original C++ source file and edit line
number
•
Produces a TNS C++ source file that is the input for Cfront
Expansion of Preprocessor Directives
Cprep includes files as directed by #include directives and SSV compiler pragmas. If
any SSV compiler pragmas are specified, they must appear on the Cprep run
command line. In addition, Cprep expands all of the preprocessor directives.
C Compiler Pragmas Used by Cprep
Cprep recognizes certain C compiler pragmas. These pragmas are used by Cprep and
where relevant they are passed through. These pragmas must appear on the Cprep
run command line or in the C++ source code. Cprep recognizes these pragmas.
Table 15-1 lists the C compiler pragmas used by Cprep.
All other C compiler pragmas are passed through to the file created by Cprep and are
used by the C compiler.
The TNS C++ translator, Cfront, is WIDE by default. The TNS C compiler is effectively
NOWIDE by default. To compile TNS C++ programs that use the 32-bit data model for
the Guardian environment, specify pragma WIDE in the C++ source file or on the TNS
C++ preprocessor, Cprep, run command line.
For a complete description of all of the C compiler pragmas, see Section 13, Compiler
Pragmas.
Table 15-1. C Compiler Pragmas Used by Cprep
[NO]CHECK RUNNABLE
COLUMNS SECTION
(source code only)
ERRORS SSV (command line only)
[NO]NEST [NO]WARN
[NO]OLDCALLS [NO]WIDE