User's Guide

Specifying -ext, enables the following HP aC++ extensions to the C++ standard:

• 64-bit integer data type support for:

long long (signed 64-bit integer)◦

◦ unsigned long long (unsigned 64-bit integer)

• Use this option to declare 64-bit integer literals and for input and output of 64-bit integers.

• #assert, #unassert preprocessor directives, which allow you to set a predicate name or

predicate name and token to be tested with a #if directive.

When this option is used with -AC89 or -AC99, it defines the following macros:

• -D__STDC_EXT__

• -D_HPUX_SOURCE (unless -Aa is used)

NOTE: When using -ext, specify it at both compile and link time. For example:

aCC -ext foo.C

compiles foo.C which contains a long long declaration.

#include <iostream.h>

int main(){

long long ll = 1;

cout << ll << endl;

}

The +e option is equivalent to the -ext option.

Floating-Point Processing Options

The following command-line options are used for floating-point processing.

+O[no]cxlimitedrange

The +O[no]cxlimitedrange option enables [disables] the specific block of codes with the usual

mathematical formulas. This option is equivalent to adding the pragma:

#pragma STDC CX_LIMITED_RANGE

The default is +Onocxlimitedrange.

+O[no]fenvaccess

The +O[no]fenvaccess option provides a means to inform the compiler when a program might

access the floating-point environment to test flags or run under non-default modes.

Use of the +Onofenvaccess option allows certain optimizations that could subvert flag tests and

mode changes such as global common subexpression elimination, code motion, and constant

folding. This option is equivalent to adding #pragma STDC FENV_ACCESS ON at the beginning

of each source file submitted for compilation.

The default is +Onofenvaccess.

42 Command-Line Options