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

Compiler Pragmas
HP C/C++ Programmer’s Guide for NonStop Systems—429301-008
13-112
WIDE
WIDE
The WIDE pragma specifies the data model, which defines the size of the data type
int. The WIDE pragma specifies the 32-bit data model. NOWIDE specifies the 16-bit
data model. (The 32-bit data model is also referred to as the wide-data model.)
The pragma default settings are:
Usage Guidelines
•
The WIDE pragma can be entered on the compiler RUN command line or in the
source text.
•
The TNS C++ translator, Cfront, is WIDE by default. The TNS C compiler is
effectively NOWIDE by default. To compile TNS C++ programs for the Guardian
environment that use the 32-bit data model, specify pragma WIDE in the C++
source file or on the TNS C++ preprocessor, Cprep, run command line.
•
In source text, the WIDE pragma must be specified before any declarations or
source code statements.
•
The native C and C++ compilers do not support these pragmas. Native compilers
generate only programs that use the 32-bit data model.
•
The WIDE pragma compiles only under the large-memory model. The combination
of the WIDE and NOXMEM pragmas is diagnosed as an error.
•
All translation units of a program must specify the same data model.
•
Programs composed of Guardian modules (modules compiled for the Guardian
environment) and OSS modules (modules compiled for the OSS environment)
must use the 32-bit data model.
•
For more information about the two data models, see Two Data Models: 16-Bit and
32-Bit on page 19-9.
•
The preprocessor variable __INT32 is defined when the WIDE pragma is in effect.
[NO]WIDE
SYSTYPE GUARDIAN SYSTYPE OSS
TNS C compiler Not set WIDE
G-series TNS c89 utility WIDE WIDE
TNS/R native C and C++ compilers N.A N.A.
Native c89 utility N.A N.A
TNS/E native C and C++ compilers N.A N.A