Date: Fri, 11 Dec 2015 15:59:07 -0500 From: Kurt Lidl <lidl@pix.net> To: freebsd-hackers@freebsd.org Subject: Re: <rpc/rpc.h> and rpc_createerr Message-ID: <566B391B.7090100@pix.net> In-Reply-To: <9CDA60925D09954CA4BAD0284E2DFC43025552@MX204CL01.corp.emc.com> References: <9CDA60925D09954CA4BAD0284E2DFC43024EDE@MX204CL01.corp.emc.com> <1449811260.30424.50.camel@michaeleichorn.com> <9CDA60925D09954CA4BAD0284E2DFC43025552@MX204CL01.corp.emc.com>
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On 12/11/15 10:22 AM, Heyman, Jerrold wrote: > Originally posted to freebsd-questions, which recommended I come here > > I've just installed FreeBSD 10.2 in order to determine the portability > of my companies code. Built gcc4.6 out of the ports/lang area, but > see the same issue using /usr/bin/cc (clang 3.4.1). > > in /usr/include/rpc/clnt.h the following snippet: > > /* > * If a creation fails, the following allows the user to figure out why. > */ > struct rpc_createerr { > enum clnt_stat cf_stat; > struct rpc_err cf_error; /* userful when cf_stat == RPC_PMAPFAILURE */ > }; > > __BEGIN_DECLS > extern struct rpc_createerr *__rpc_createeer(void); > __END_DECLS > #define rpc_createerr (*(__rpc_createeerr())) > > Note that the #define becomes active once the file is included, and in > my source code I have multiple > > struct rpc_createerr *ce; > > declarations. Both cc and gcc cite this as an error, though for different reasons. > > gcc complains that a '(' is found where a '{' is expected. > The cc error message is 'error: declaration of anyonymous struct must be a definition'. > > My other ports - Linux, AIX, Solaris, Mac OSX, do not have the #define in /usr/include/rpc/clnt.h. > The HP-UX does, but it is encapsulated within a #ifdef _REENTRANT / #endif block. > > Is this an actual error, or is there something on FreeBSD that I need > to do that is different than the other platforms? Well, the rpc_clnt_client(3) manpage says: > struct rpc_createerr rpc_createerr; > A global variable whose value is set by any RPC client handle > creation routine that fails. It is used by the routine > clnt_pcreateerror() to print the reason for the failure. As a global variable, I'm not sure how you're going to have multiple different ones... The following code compiles with no warnings -- note that the rpc_createerr structure isn't allocated (explictly) in this code. #include <rpc/rpc.h> int main(int argc, char *argv[]) { CLIENT *client = NULL; client = clnt_create("localhost", 1, 1, "udp"); if (client == NULL) return ((int)rpc_createerr.cf_stat); return 0; } -Kurt
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