OPTIONS

The OPTIONS @ statement overrides compiler command-line options.

OPTIONS /qualifier [/qualifier ]

Description

The following table shows the OPTIONS statement qualifiers:

Table 4-4 OPTIONS Statement Qualifiers

Qualifier	Action Taken
/[NO]G_FLOATING	None (not implemented)
/[NO]I4	Enables/Disables the -i2 option
/[NO]F77	None (not implemented)
/CHECK=ALL	Enables the -C option
/CHECK=[NO]OVERFLOW	None (not implemented)
/CHECK=[NO]BOUNDS	Disables/Enables the -C option
/CHECK=[NO]UNDERFLOW	None (not implemented)
/CHECK=NONE	Disables the -C option
/NOCHECK	Disables the -C option
/[NO]EXTEND_SOURCE	Disables/enables the -e option

Restrictions

The OPTIONS statement must be the first statement in a program unit; it must be before the BLOCK DATA, FUNCTION, PROGRAM, and SUBROUTINE statements.

Options set by the OPTIONS statement override those of the command line.

Options set by the OPTIONS statement endure for that program unit only.

A qualifier can be abbreviated to four or more characters.

Uppercase or lowercase is not significant.

Example

For the following source, integer variables declared with no explicit size occupy 4 bytes rather than 2, with or without the -i2 option on the command line. This rule does not change the size of integer constants, only variables.

---

       OPTIONS /I4 
       PROGRAM FFT 
       ... 
       END 

---

By way of contrast, if you use /NOI4, then all integer variables declared with no explicit size occupy 2 bytes rather than 4, with or without the -i2 option on the command line. However, integer constants occupy 2 bytes with -i2, and 4 bytes otherwise.