use of extern directive

[sarang]

hi,
i m sarang the new member of 'thescripts'.
i want to know how to use extern directive with function.
i can better explain my problem in following way:
I saw in one of the project, there was two files test.h and foo.c.
a function body
int foo(int arg)
{
//declarations
}
was defined in foo.c and test.h contained following code :
extern int foo OF((int arg));
I read about extern directive but have problem with understading with use of "OF(( ))" as shown in above line.

thank you

[gpraghuram]

hi,
i m sarang the new member of 'thescripts'.
i want to know how to use extern directive with function.
i can better explain my problem in following way:
I saw in one of the project, there was two files test.h and foo.c.
a function body
int foo(int arg)
{
//declarations
}
was defined in foo.c and test.h contained following code :
extern int foo OF((int arg));
I read about extern directive but have problem with understading with use of "OF(( ))" as shown in above line.

thank you

I think OF should have beed #defined as nothing in the project.

Raghuram

[sarang]

I think OF should have beed #defined as nothing in the project.

Raghuram

Thank you for ur reply.
I got the OF in the project as :

#define OF(args) args
#endif

But can you please explain its purpose.

[gpraghuram]

Thank you for ur reply.
I got the OF in the project as :

#define OF(args) args
#endif

But can you please explain its purpose.

I dont find any real usage with that.
But other mebers in the group can help.

Raghu