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Hi again Thomas Well I forgot to link the rsplib in with -lrsplib. It does however not solve the errors i see when compiling my apps. Source code of my application: #include <rserpool/rserpool.h> #include <rserpool/rserpool-internals.h> #include <rserpool/tagitem.h> #include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <math.h> #include <sys/types.h> #include <signal.h> #include "petestserver.h" void rsp_initinfo(struct rsp_info* info); void startServer() { // get initial structs struct rsp_info rspInfo; struct rsp_loadinfo rspLoadInfo; // used for system load etc. struct TagItem rspTags[8]; // used for the taging system double rspDegradation; unsigned int rspIdentifier; unsigned int rspReRegInterval = 30000; unsigned int rspUnTimeLimit = 0; unsigned int rspService = 1; // was SERVICE_ECHO const char* rspPoolHandle = NULL; const char* rspDaemonPIDFile = NULL; bool rspPolicyChanged = false; bool rspQuiet = false; double rspUptime = 0.0; double rspDowntime = 0.0; // now set variables before initialising rsp_initinfo(&rspInfo); rspTags[0].Tag = TAG_PoolElement_Identifier; rspTags[0].Data = "0; // enable CSP monitoring rspInfo.ri_csp_identifier = CID_COMPOUND(CID_GROUP_POOLELEMENT, 0); } This code produces the following error during compilation: petestserver.c:42: warning: implicit declaration of function ‘CID_COMPOUND’ petestserver.c:42: error: ‘CID_GROUP_POOLELEMENT’ undeclared (first use in this function) petestserver.c:42: error: (Each undeclared identifier is reported only once This error I was able to circumvent by copying componentstatuspackets.h and tdtypes.h from source into /usr/local/include/rserpool and adding #include <rserpool/componentstatuspackets.h> in my .c file. Having done this i arrive at the real error which I don't seem to understand: petestserver.c: In function ‘startServer’: petestserver.c:35: warning: unused variable ‘rspDowntime’ petestserver.c:34: warning: unused variable ‘rspUptime’ petestserver.c:33: warning: unused variable ‘rspQuiet’ petestserver.c:32: warning: unused variable ‘rspPolicyChanged’ petestserver.c:31: warning: unused variable ‘rspDaemonPIDFile’ petestserver.c:30: warning: unused variable ‘rspPoolHandle’ petestserver.c:29: warning: unused variable ‘rspService’ petestserver.c:28: warning: unused variable ‘rspUnTimeLimit’ petestserver.c:27: warning: unused variable ‘rspReRegInterval’ petestserver.c:26: warning: unused variable ‘rspIdentifier’ petestserver.c:25: warning: unused variable ‘rspDegradation’ petestserver.c:23: warning: unused variable ‘rspLoadInfo’ /tmp/cc6n41Ek.o: In function `startServer': petestserver.c:(.text+0x45): undefined reference to `rsp_initinfo' collect2: ld returned 1 exit status It is the undefined reference to rsp_initinfo error. (nevermind the unused variable messages) This still occurs although compiled with the following command: gcc -lrsplib -Wall -o petestserver main.c petestserver.c What am I doing wrong? One more thing. Was its the rsp_info struct actually used for ? Once again - thanks for helping me out. Best regards Martin, Aalborg University, Denmark Thomas Dreibholz skrev: Dear Martin, see my comments inline. On Freitag 13 März 2009, Martin Kirch Dige wrote: 
    
  rsp_initinfo() is defined in rsputilities.c, which is compiled into the rsplib library. Including "rserpool.h" and linkling -lrsplib should work. Could you provide us the complete errors and warnings of the compile run? 
    
  For the PE, have a look at server.cc. It is a starter for different services (e.g. Echo or Discard - the are implemented in standardservices.cc). To make programming of these example services easier, I wrote two C++ API wrappers: tcplikeserver.cc (which starts a new thread to handle each session; like common TCP-based services) and udplikeserver.cc (which handles messages from all sessions; i.e. request -> response). The examples in standardservices.cc should - hopefully - make the idea clearer. For a more complex service, have a look into fractalgeneratorservice.cc (this is the service for the Fractal Generator example). On the PU side, have a look into terminal.c (which can be used with Echo, Discard, etc.). This example is quite simple and should - hopefully - be easy to understand. Again, a more complex example - using multiple sessions in different threads - is fractalpooluser.cc. 
    
  If you have more questions, just write them on the mailing list. Best regards _______________________________________________ rsplib-discussion mailing list rsplib-discussion AT sctp.de http://www.sctp.de/mailman/listinfo/rsplib-discussion  | 
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