Thread: [q-lang-users] modules in c++

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Hi folks,

I'm sorry if this is off topic, but I'm having a hard time finding doc
on the web.

I'm trying to write an external module in C++. (It's actually a cover
for the Blitz++ array library.)

Using the bar.c example from the documentation (reproduced below), the
first step in running qcc is always:

$ qcc -v bar.c
gcc -c bar.c
...

So I decided to try the simplest thing I could think of: rename bar.c
to bar.cpp, and run g++:

g++ -c bar.cpp

I get a pack of errors that look like:
In file included from bar.cpp:1:
C:/Tools/Qpad/include/libq.h:130: error: external linkage required for
symbol 'truesym' because of 'dllimport' attribute.
C:/Tools/Qpad/include/libq.h:130: error: external linkage required for
symbol 'falsesym' because of 'dllimport' attribute.
...

My question is: how do I make g++ do the right thing on "dllimport"s?

Thanks very much.

Brian

----------------- bar.c ---------------------
#include <libq.h>

MODULE(bar)

typedef struct { long i, j; } Bar;

FUNCTION(bar,bar,argc,argv)
{
  long i, j;
  if (argc !=3D 2 || !isint(argv[0], &i) || !isint(argv[1], &j))
    return __FAIL;
  else {
    Bar *v =3D malloc(sizeof(Bar));
    expr x;
    if (!v) return __ERROR;
    v->i =3D i; v->j =3D j;
    return mkobj(type(Bar), v);
  }
}
---------------------------------------------

--=20
Brian P. Wilfley, Ph.D.
Principal Scientist
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