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Re: CALL_EXTERNAL puzzle? [message #12766 is a reply to message #12680]

Thu, 03 September 1998 00:00

steinhh
Messages: 260
Registered: June 1994

Senior Member

rmlongfield@my-dejanews.com wrote:

> print,'de-referenced pointer: ',*filename
> result = CALL_EXTERNAL(VALUE=[1B],'example_c.so','example_c', filename)

Whooa - here you're sending a *pointer* to a *string* variable
into the call_external routine - and it's definitely *not* set
up to receive it! In fact, your routine would *only* work if
you sent it a scalar string that is passed by *value* only.
(E.g. a string literal)

> So, is this a bug or a feature of CALL_EXTERNAL which I didn't quite grasp
> from the excellent documentation ;) I hate to think that my success with
> CALL_EXTERNAL was merely accidental.

Sorry to say it's a feature :-)

Regards,

Stein Vidar

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		CALL_EXTERNAL puzzle? By: rmlongfield on Thu, 03 September 1998 00:00
		Re: CALL_EXTERNAL puzzle? By: steinhh on Thu, 03 September 1998 00:00

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