HP SunSoft Pascal 4.0 Manuale Utente Scaricare il pdf (Pagina 71)

The Pascal Compiler 47

-tc

The -tc option instructs the compiler to generate pc3 stab information that

allows cross-module type checking.

This option can be used for two purposes:

• To check for any name conﬂicts that your program may have with the

standard libraries with which it is to be linked, such as libc. The linker

allows name conﬂicts, which may cause erroneous runtime behavior in your

program.

For example, the following program has a name conﬂict with libc:

When the program is compiled with the -tc option, pc3 issues a warning

that the name time is already deﬁned as a libc routine. Running a.out

causes a core dump. To avoid this problem, change the name of the variable

that has the conﬂict—in this case, time.

• To check for possible name conﬂicts in the various modules of your

program. These conﬂicts arise if you deﬁne a routine with the same name in

several modules, or refer to an external, but undeﬁned, variable. The linker

detects these error situations and does not create the executable ﬁle.

–temp=dir

The –temp option instructs pc to locate the temporary ﬁles that it creates

during compilation in the directory named dir. For example, the following

command puts the temporary ﬁles in the current directory.

hostname% pc -temp=. hello.p

If you do not specify a temporary directory, pc places the temporary ﬁles in

the /tmp directory.

program p(output);

var time: integer;

begin

writeln(wallclock);

end.

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HP SunSoft Pascal 4.0 Manuale Utente Pagina 71