HP SunSoft Pascal 4.0 Uživatelský manuál stáhnout pdf (Strana 62)

38 Pascal 4.0 User’s Guide

This command causes the optimizer to try to recover if it reaches 16 megabytes

of data space.

This limit cannot be greater than the machine’s total available swap space, and

in practice, should be small enough to permit normal use of the machine while

a large compilation is in progress. For example, on a machine with 32

megabytes of swap space, the command limit datasize 16M ensures that

a single compilation never consumes more than half of the machine’s swap

space.

The best setting of data size depends on the degree of optimization requested

and the amount of real memory and virtual memory available. To ﬁnd the

actual swap space:

hostname% /usr/sbin/swap -s

To ﬁnd the actual real memory:

hostname% /usr/sbin/prtconf | grep Memory

–o ﬁlename

The –o option instructs the compiler to name the generated executable,

ﬁlename. The default ﬁle name for executable ﬁles is a.out; for object ﬁles, it

is the source ﬁle name with a .o extension. For example, the following

command stores the executable in the ﬁle, myprog:

hostname% pc -o myprog myprog.p

If you use this option with the -c option, the name you give is used as the

name for the object ﬁle. The default ﬁle name for object ﬁles is the source ﬁle

name with a .o extension. You cannot give the object ﬁle the same name as

the source ﬁle.

–P

The –P option causes the compiler to use partial evaluation semantics on the

boolean operators, and and or. Left-to-right evaluation is guaranteed, and

the second operand is evaluated only if necessary to determine the result.

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HP SunSoft Pascal 4.0 Uživatelský manuál Strana 62