foreign resources

Hi,
I am trying to mix C++ and prolog (Prolog calling C++) with foreign
resources but I have compilation issues, though following the documentation.
I tried to use the PREDICATE macro, but it sems to fail. Any idea of
waht is going wrong?

I am using swi-pl on Ubuntu: SWI-Prolog version 5.10.4 for amd64

Here is my source file cassiopee.cpp:

#include <SWI-Prolog.h>

PREDICATE(hello, 1)
{ cout << "Hello " << (char *)A1 << endl;

  return TRUE;
}

And here is my compilation log/error:

/swi$ swipl-ld -v  cassiopee.cpp

eval `swipl --dump-runtime-variables`
		CC="gcc"
		PLBASE="/usr/lib/swi-prolog"
		PLARCH="amd64"
		PLLIBS="-lgmp -lrt -lreadline -lncurses -lm -lrt -ldl"
		PLLIB="-lswipl"
		PLCFLAGS="-pthread -fPIC"
		PLLDFLAGS="-rdynamic -Wl,-Bsymbolic-functions -Wl,-z,relro -pthread"
		PLSOEXT="so"
		PLTHREADS="yes"
	g++ -c -pthread -fPIC -D_REENTRANT -D__SWI_PROLOG__ -D__SWI_EMBEDDED__ -I/usr/lib/swi-prolog/include -o cassiopee.o cassiopee.cpp
cassiopee.cpp:12:10: error: expected constructor, destructor, or type conversion before '(' token
g++ returned code 256
*** swipl-ld exit status 1



Thanks

Olivier


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