Re: Calling External DLL functions in Perl using Inline


<ben.sommer@xxxxxxx>
>
>
> Hi All.
>
> I'm just wondering how this problem resolved for you, Sankaran. I have
> the (almost) exact same problem, though my environment is cygwin+gcc.

Brian McCauley suggested the specific problem to which you allude was the
result of trying to process C++ source code with the compiler in C mode. If
that's so (and I've seen a couple of other posts suggesting the same thing)
then I think the solution would be to either convert the C++ source to C, or
use Inline::CPP.

With gcc, you need to be compiling C++ code with g++, not gcc - so if,
during the installation of Inline::CPP, you're prompted for which compiler
to use, make sure that g++ is specified.

So ..... I guess the advice is for you to use Inline::CPP if the source is
C++. If the source is C and you're still getting those errors, then let us
know.

> The user32.dll example from the Inline docs works flawlessly for me as
> well.

That's C code, so one would expect no problem there.

>Also, for my application, any conceivable permutation of the INC
> or LIBS directives (and windows/cygwin LIB/INC/PATH environment
> variables) always results in this:
>
> Note (probably harmless): No library found for '-lMyLib'
>

Sometimes that warning actually *is* harmless - I see it from time to time,
but I only ever take notice of it whenever 'MyLib' is not found.

If the lib is not being found, have you tried:
LIBS => '-L/full_path/to_MyLib -lMyLib',

If you specify '-lMyLib', will gcc find a file called 'MyLib.a', or will it
find only a file named 'libMyLib.a' ? (I think it will find either, but you
might check on that in case there's a problem there.)

Let us know how you get on with this.

Cheers,
Rob


.

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