Re: fwd declaration/dependency problem in 1.3.7

[Bowie Owens <bowie owens csiro au>]

Hi David,

Is there some reason why you can't put the both in the same file? For 
example the following:

module Bug
{
 interface Bar;
                                                                               

 interface Foo
 {
   void DoFoo(in Bar bar);
 };
                                                                               

 interface Bar
 {
   Foo GetFoo();
 };
};

If they have to be in separate files, you should stick with the forward 
declarations and try something similar to what I recently suggested to 
Robert Melby to get the .cc files to compile. See: 
http://mail.gnome.org/archives/orbitcpp-list/2003-October/msg00001.html

David Nadle wrote:

> Hi,
>
> Not sure if I'm doing something stupid, so I thought I'd post here
> instead of submitting to Bugzilla. I'm unable to get a compile of the
> generated .cc files when there is a bidirectional association of two
> interfaces. If I use forward declarations the .c files compile fine but
> the .cc files don't reference each other. If I replace the forward
> declarations with #includes, the orbit-idl-2 compiler craps out.
>
> I have created a very small test case to demonstrate the problem:
>
> ----------------------------------
> foo.idl:
> ----------------------------------
>
> #ifndef __FOO_IDL__
> #define __FOO_IDL__
>
> module Bug
> {
>  interface Bar;
>
>  interface Foo
>  {
>    void DoFoo(in Bar bar);
>  };
> };
>
> #endif
>
> ----------------------------------
> bar.idl:
> ----------------------------------
>
> #ifndef __BAR_IDL__
> #define __BAR_IDL__
>
> module Bug
> {
>  interface Foo;
>
>  interface Bar
>  {
>    Foo GetFoo();
>  };
> };
>
> #endif
>
> ----------------------------------
> Makefile:
> ----------------------------------
>
> IDLS=foo.idl bar.idl
>
> INCS=-I/usr/local/include/orbitcpp-2.0 -I/usr/include/orbit-2.0 \
>        -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include \
>        -I/usr/include/linc-1.0
>
> CFILES=${IDLS:.idl=-common.c} ${IDLS:.idl=-skels.c}
> ${IDLS:.idl=-stubs.c}
> CPPFILES=${IDLS:.idl=-cpp.cc}
>
> COBJS=${CFILES:.c=.o}
> CPPOBJS=${CPPFILES:.cc=.o}
>
> all : ${COBJS} ${CPPOBJS}
>
> ${COBJS} : ${CFILES}
>
> ${CPPOBJS} : ${CPPFILES} ${CFILES}
>
> ${CFILES} : ${IDLS}
>
> ${CPPFILES} : ${IDLS}
>
> clean:
>        rm -f *.o *.h *.c *.cc
>                                                                                
> %-common.c : %.idl
>        orbit-idl-2 -l c $<
>                                                                                
> %-cpp.cc : %.idl
>        orbit-idl-2 -l cpp $<
>                                                                                
> %.o : %.c
>        gcc -c ${INCS} $<
>                                                                                
> %.o : %.cc
>        g++ -c ${INCS} $<
>
> ----------------------------------
> make output:
> ----------------------------------
> orbit-idl-2 -l c foo.idl
> orbit-idl-2 2.6.0 compiling
>  mode, show preprocessor errors, passes: stubs skels common headers
> skel_impl imodule
>
> foo.idl:6: Warning: Unresolved forward declaration `Bug::Bar'
> orbit-idl-2 -l c bar.idl
> orbit-idl-2 2.6.0 compiling
>  mode, show preprocessor errors, passes: stubs skels common headers
> skel_impl imodule
>
> bar.idl:6: Warning: Unresolved forward declaration `Bug::Foo'
> gcc -c -I/usr/local/include/orbitcpp-2.0 -I/usr/include/orbit-2.0
> -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
> -I/usr/include/linc-1.0 foo-common.c
> gcc -c -I/usr/local/include/orbitcpp-2.0 -I/usr/include/orbit-2.0
> -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
> -I/usr/include/linc-1.0 bar-common.c
> gcc -c -I/usr/local/include/orbitcpp-2.0 -I/usr/include/orbit-2.0
> -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
> -I/usr/include/linc-1.0 foo-skels.c
> gcc -c -I/usr/local/include/orbitcpp-2.0 -I/usr/include/orbit-2.0
> -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
> -I/usr/include/linc-1.0 bar-skels.c
> gcc -c -I/usr/local/include/orbitcpp-2.0 -I/usr/include/orbit-2.0
> -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
> -I/usr/include/linc-1.0 foo-stubs.c
> gcc -c -I/usr/local/include/orbitcpp-2.0 -I/usr/include/orbit-2.0
> -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
> -I/usr/include/linc-1.0 bar-stubs.c
> orbit-idl-2 -l cpp foo.idl
> orbit-idl-2 2.6.0 compiling
>  mode, show preprocessor errors, passes: stubs skels common headers
> skel_impl imodule
>                                                                                
> foo.idl:6: Warning: Unresolved forward declaration `Bug::Bar'
> orbit-idl-2 -l cpp bar.idl
> orbit-idl-2 2.6.0 compiling
>  mode, show preprocessor errors, passes: stubs skels common headers
> skel_impl imodule
>                                                                                
> bar.idl:6: Warning: Unresolved forward declaration `Bug::Foo'
> g++ -c -I/usr/local/include/orbitcpp-2.0 -I/usr/include/orbit-2.0
> -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include
> -I/usr/include/linc-1.0 foo-cpp.cc
> In file included from foo-cpp.cc:6:
> foo-cpp-common.cc: In member function `void Bug::Foo::DoFoo(Bug::Bar*)':
> foo-cpp-common.cc:21: invalid use of undefined type `struct Bug::Bar'
> foo-cpp-common.h:20: forward declaration of `struct Bug::Bar'
> In file included from foo-cpp.cc:8:
> foo-cpp-skels.cc: In static member function `static void
>   POA_Bug::Foo::_skel_DoFoo(void*, CORBA_Object_type*,
> CORBA_Environment*)':
> foo-cpp-skels.cc:40: no method `Bug::Bar::_orbitcpp_wrap'
> /usr/local/include/orbitcpp-2.0/orbitcpp/orb-cpp/smartpointers/objectptr_var.h:
> In
>   member function `void _orbitcpp::ObjectPtr_var<O>::free() [with O =
>   Bug::Bar]':
> /usr/local/include/orbitcpp-2.0/orbitcpp/orb-cpp/smartpointers/objectptr_var.h:53:   instantiated from `void _orbitcpp::ObjectPtr_var<O>::ObjectPtr_var() [with
> O = Bug::Bar]'
> foo-cpp-skels.cc:40:   instantiated from here
> /usr/local/include/orbitcpp-2.0/orbitcpp/orb-cpp/smartpointers/objectptr_var.h:94: no
>   method `Bug::Bar::_nil'
> /usr/local/include/orbitcpp-2.0/orbitcpp/orb-cpp/smartpointers/objectptr_var.h:95: no
>   matching function for call to `release(Bug::Bar*&)'
> /usr/local/include/orbitcpp-2.0/orbitcpp/orb-cpp/orbitcpp_object.h:51:
> candidates
>   are: void CORBA::release(CORBA::ServerlessObj*)
> /usr/local/include/orbitcpp-2.0/orbitcpp/orb-cpp/orbitcpp_object.h:99:
>          void CORBA::release(CORBA::Object*)
> /usr/local/include/orbitcpp-2.0/orbitcpp/orb-cpp/orbitcpp_orb.h:46:
>       void CORBA::release(CORBA::ORB*)
> /usr/local/include/orbitcpp-2.0/orbitcpp/orb-cpp/orbitcpp_poa.h:256:
>        void CORBA::release(PortableServer::POA*)
> /usr/local/include/orbitcpp-2.0/orbitcpp/orb-cpp/orbitcpp_typecode.h:212:
>             void CORBA::release(CORBA::TypeCode*)
> /usr/local/include/orbitcpp-2.0/orbitcpp/orb-cpp/smartpointers/objectptr_var.h:96: no
>   method `Bug::Bar::_nil'
> make: *** [foo-cpp.o] Error 1
>
>
>
> _______________________________________________
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> http://mail.gnome.org/mailman/listinfo/orbitcpp-list
>  


--
Bowie Owens

CSIRO Mathematical & Information Sciences
phone  : +61 3 9545 8055
fax    : +61 3 9545 8080
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email  : Bowie Owens csiro au