HP C/aC++ for PA-RISC Software manual Floating-Point Processing Options, +Onocxlimitedrange

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 -AC89or -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;

}

+e

The +e option is equivalent to the -extoption.

Floating-Point Processing Options

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

+O[no]cxlimitedrange

+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

+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