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digitalmars.D - Calling a non-mangled C function?

reply "Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:
I have a lib that was compiled in C, and the names are NOT mangled.  So no
_Function 4, just Function.

How do I call this from D?  In my D code, I have the line:

extern (C) Function(int whatever);

and when I link, the linker likes the library, but my program's obj file is
looking for _Function 4, when it should be looking for an unmangled name.

How on earth can I get it to look for the unmangled name?
Jan 02 2005
next sibling parent "Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:
Neeevermind, found out I could do it with an IMPORTS directive in the .def
file.

WOW am I overjoyed :D
Jan 02 2005
prev sibling next sibling parent reply Stewart Gordon <smjg_1998 yahoo.com> writes:
Jarrett Billingsley wrote:
<snip>

 extern (C) Function(int whatever);


What happened to the return type?  Should this compile?


 and when I link, the linker likes the library, but my program's obj file is
 looking for _Function 4, when it should be looking for an unmangled name.


This looks like a bug to me.

Stewart.

-- 
My e-mail is valid but not my primary mailbox.  Please keep replies on 
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Jan 02 2005
parent "Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:
 What happened to the return type?  Should this compile?


I just typed the code, didn't copy and paste ;)  I realized that there was
no return type after I posted it, but there is no Edit Post function here,
and I figured no one would really notice..


 This looks like a bug to me.


Maybe not a bug, but an oversight.  Perhaps Walter didn't know that it was
possible to have unmangled names..?  Anyway, it was a very simple fix (in my
def file, all I had to put was an IMPORTS _Function 4=<libname>.Function).

Still, would be nice to not have to do that, though I'm not sure how it'd
translate from the matching C++ code that generated the lib - "extern "C"
__declspec(dllexport)".  I though that "extern (C) export" would do it, but
apparently not..
Jan 02 2005
prev sibling parent reply "Walter" <newshound digitalmars.com> writes:
"Jarrett Billingsley" <kb3ctd2 yahoo.com> wrote in message
news:cr9807$2ntf$1 digitaldaemon.com...

 I have a lib that was compiled in C, and the names are NOT mangled.  So no
 _Function 4, just Function.

 How do I call this from D?  In my D code, I have the line:

 extern (C) Function(int whatever);

 and when I link, the linker likes the library, but my program's obj file


is

 looking for _Function 4, when it should be looking for an unmangled name.

 How on earth can I get it to look for the unmangled name?


_Function 4 is mangled with the:
    extern (Windows)
mangling.
Jan 03 2005
parent "Jarrett Billingsley" <kb3ctd2 yahoo.com> writes:
 _Function 4 is mangled with the:
     extern (Windows)
 mangling.


My bad.  But using extern(C) still doesn't help the problem - then it looks
for _Function.
Jan 03 2005