How are you compiling ( flags ).  I'm getting a diifferent error then you.  RESMGR_HANDLE_t is by default equal to (void
*).  Thus handle will generate the warning and must be cast to  (iofunc_attr_t*)

> Hello people!
> 

> This is my first post, and am excited about participating in the QNX community
> .
> 
> I'm attempting to write a resource manager in C++, and I was given a mickey-
> mouse example program so I could learn how to write one. In this program, I 
> have an io_open() function that will be called every time an open() request 
> comes in. Here is the code for the function:
> 
> int io_open( resmgr_context_t *ctp, io_open_t *msg, 
>  RESMGR_HANDLE_T *handle, void *extra )
> {
>     int returnVal = 0;
> 
>     printf("Some debug message\n")
> 
>     returnVal = iofunc_open_default( ctp, msg, handle, extra ); 
> 
>     return ( returnVal );
> }
> 
> The prototype for iofunc_open_default() is as follows (in sys/iofunc.h):
> 
> int iofunc_open_default( resmgr_context_t *ctp, io_open_t *msg, 
>  iofunc_attr_t *attr, void *extra );
> 
> When I attempt to compile, I get the following error message in reference to 
> the 'void *extra' parameter argument:
> 
> "ANSI C++ forbids implicit conversion from `void *' in argument passing"
> 
> So my question is, do I need to explicitly compile my resource manager in C? 
> Or is there a way I can pass in (void *) to the iofunc_open_default() in C++? 
> It seems to me there should be a way, otherwise C++ should also complain that 
> there is a (void *) parameter in the argument list.
> 
> If this is the wrong forum, I ask for mercy and to be redirected to the proper
>  forum.
> 
> Thanks!
> 
> ~Anthony
>