add warning for gmp, use gmc to detect memory leak.

@@ -37,11 +37,11 @@ echo -e "\${GREEN}build summary:\${BLACK}"
 echo -e "     \${BLACK}+------------------------------------------------------------------------------------\${BLACK}"
 echo -e "     |${SrsGperfSummaryColor}gperf @see: https://github.com/simple-rtmp-server/srs/wiki/v1_CN_GPERF\${BLACK}"
 echo -e "     |     ${SrsGperfMCSummaryColor}gmc @see: http://google-perftools.googlecode.com/svn/trunk/doc/heap_checker.html\${BLACK}"
-echo -e "     |     ${SrsGperfMCSummaryColor}gmc: gperf memory check\${BLACK}"
+echo -e "     |     ${SrsGperfMCSummaryColor}gmc: gperf memory check, or memory leak detect\${BLACK}"
 echo -e "     |             ${SrsGperfMCSummaryColor}env PPROF_PATH=./objs/pprof HEAPCHECK=normal ./objs/srs -c conf/console.conf # start gmc\${BLACK}"
 echo -e "     |             ${SrsGperfMCSummaryColor}killall -2 srs # or CTRL+C to stop gmc\${BLACK}"
 echo -e "     |     ${SrsGperfMPSummaryColor}gmp @see: http://google-perftools.googlecode.com/svn/trunk/doc/heapprofile.html\${BLACK}"
-echo -e "     |     ${SrsGperfMPSummaryColor}gmp: gperf memory profile\${BLACK}"
+echo -e "     |     ${SrsGperfMPSummaryColor}gmp: gperf memory profile, similar to gcp\${BLACK}"
 echo -e "     |             ${SrsGperfMPSummaryColor}rm -f gperf.srs.gmp*; ./objs/srs -c conf/console.conf # start gmp\${BLACK}"
 echo -e "     |             ${SrsGperfMPSummaryColor}killall -2 srs # or CTRL+C to stop gmp\${BLACK}"
 echo -e "     |             ${SrsGperfMPSummaryColor}./objs/pprof --text objs/srs gperf.srs.gmp* # to analysis memory profile\${BLACK}"

@@ -254,6 +254,11 @@ int main(int argc, char** argv)
         "it is not possible to run both the heap-checker and heap profiler at the same time");
 #endif
     
+    // never use gmp to check memory leak.
+#ifdef SRS_AUTO_GPERF_MP
+    #warning "gmp is not used for memory leak, please use gmc instead."
+#endif
+    
     // never use srs log(srs_trace, srs_error, etc) before config parse the option,
     // which will load the log config and apply it.
     if ((ret = _srs_config->parse_options(argc, argv)) != ERROR_SUCCESS) {