From:	"Matt Pemberton" <matt AT pembers DOT freeuk DOT com DOT spamless>
Newsgroups:	comp.os.msdos.djgpp
Subject:	DJGPP and DataEase CDFs
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Message-ID:	<mHg04.1789$4a5.42062@nnrp4.clara.net>
Date:	Sun, 28 Nov 1999 20:57:54 GMT
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

Hi,
    I am having a bit of a problem that I'm hoping somebody out there can
help me with.

    I am trying to create a Custom Defined Function for DataEase (Version 5,
16M edition). The DataEase manual tells me I can do this 'in any language
which supports the use of far pointers and the pascal calling convention'.
It goes on to give an example in Microsoft C. However, when I try to compile
the example using DJGPP it gives me errors. It doesn't seem to like the bit
that declares the function as using far pointers, or the pascal calling
convention (ie. I declare the function using a line like

'double far pascal SomeFunction(int SomeVaribale, int SomeOtherVariable);'

as shown in the manual, and DJGPP will not compile it unless I remove the
'far pascal' bit).

    So how do I declare a function like this in DJGPP? Is it in fact
possible - I have had it suggested to me that waht I am trying to do is
irrelevant as DJGPP is a 32-bit compiler and so far pointers do not apply,
and because the pascal calling convention is not defined for ANSI C. If I
can't achieve what I am trying to do using DJGPP, is there any other
compiler which will allow me to do this?

    The manual also tells me that using Microsoft C I should use the
compiler switch '-Alfu'. Can anybody tell me what the equivalent might be
for DJGPP, if applicable. I had a look for it in the DJGPP docs (info gpp
invoke) but as I'm not entirely sure what it does when used with the
Microsoft C compiler I didn't get very far.

TIA,
    Matt.

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