diff --git a/Makefile b/Makefile
index ff7d3d8..ac52cd2 100644
--- a/Makefile
+++ b/Makefile
@@ -4,8 +4,12 @@ include $(TOP)/configure/CONFIG
 
 # Directories to build, any order
 DIRS += configure
-DIRS += $(wildcard *App)
-DIRS += $(wildcard iocBoot)
+DIRS += p2pApp
+ifeq ($(DEVEL),YES)
+DIRS += pdbApp
+endif
+DIRS += testApp
+#DIRS += $(wildcard iocBoot)
 
 # iocBoot depends on all *App dirs
 iocBoot_DEPEND_DIRS += $(filter %App,$(DIRS))
diff --git a/common/pvahelper.h b/common/pvahelper.h
index 6102292..4eed90d 100644
--- a/common/pvahelper.h
+++ b/common/pvahelper.h
@@ -400,6 +400,7 @@ private:
             self->requestUpdate(); // may result in post()
     }
 public:
+#ifdef DEVEL
     virtual void getStats(Stats& s) const
     {
         guard_t G(lock);
@@ -407,6 +408,7 @@ public:
         s.nfilled = inuse.size();
         s.noutstanding = nbuffers - s.nempty - s.nfilled;
     }
+#endif
 };
 
 template<class CP>
diff --git a/configure/CONFIG_SITE b/configure/CONFIG_SITE
index 208aa7e..7cf5798 100644
--- a/configure/CONFIG_SITE
+++ b/configure/CONFIG_SITE
@@ -34,3 +34,7 @@ CHECK_RELEASE = YES
 #   or CROSS_OPT settings from base/configure/CONFIG_SITE
 #HOST_OPT = NO
 #CROSS_OPT = NO
+
+# enable features which depend on unmerged/unreleased
+# features of dependencies.
+DEVEL = NO
diff --git a/p2pApp/Makefile b/p2pApp/Makefile
index 1640de1..8052e6b 100644
--- a/p2pApp/Makefile
+++ b/p2pApp/Makefile
@@ -5,6 +5,10 @@ include $(TOP)/configure/CONFIG
 #  ADD MACRO DEFINITIONS AFTER THIS LINE
 #=============================
 
+ifeq ($(DEVEL),YES)
+USR_CPPFLAGS += -DDEVEL
+endif
+
 PROD_HOST = p2p
 
 p2p_SRCS += main.cpp
diff --git a/p2pApp/server.cpp b/p2pApp/server.cpp
index 275a98a..c63c7e9 100644
--- a/p2pApp/server.cpp
+++ b/p2pApp/server.cpp
@@ -315,7 +315,9 @@ void statusServer(int lvl, const char *chanexpr)
 
                     MonitorCacheEntry::interested_t::vector_type usrs;
                     size_t nsrvmon;
+#ifdef DEVEL
                     pvd::Monitor::Stats mstats;
+#endif
                     bool hastype, hasdata, isdone;
                     {
                         Guard G(ME.mutex());
@@ -325,8 +327,10 @@ void statusServer(int lvl, const char *chanexpr)
                         hasdata = !!ME.lastelem;
                         isdone = ME.done;
 
+#ifdef DEVEL
                         if(ME.mon)
                             ME.mon->getStats(mstats);
+#endif
 
                         if(lvl>2)
                             usrs = ME.interested.lock_vector();
@@ -339,10 +343,12 @@ void statusServer(int lvl, const char *chanexpr)
                              <<"recv'd some data, Has "<<(isdone?"":"not ")<<"finalized\n"
                                "    "<<      epicsAtomicGetSizeT(&ME.nwakeups)<<" wakeups "
                              <<epicsAtomicGetSizeT(&ME.nevents)<<" events\n";
+#ifdef DEVEL
                     if(mstats.nempty || mstats.nfilled || mstats.noutstanding)
                         std::cout<<"    US monitor queue "<<mstats.nfilled
                                  <<" filled, "<<mstats.noutstanding
                                  <<" outstanding, "<<mstats.nempty<<" empty\n";
+#endif
 
                     if(lvl<=2)
                         continue;
diff --git a/testApp/Makefile b/testApp/Makefile
index 3d26511..74ca576 100644
--- a/testApp/Makefile
+++ b/testApp/Makefile
@@ -37,6 +37,7 @@ testmon_SRCS = testmon.cpp
 testmon_LIBS = testutils p2pcore pvAccess pvData Com
 TESTS += testmon
 
+ifeq ($(DEVEL),YES)
 
 TESTPROD_HOST += testpvif
 testpvif_SRCS += testpvif.cpp
@@ -50,6 +51,8 @@ testpdb_SRCS += p2pTestIoc_registerRecordDeviceDriver.cpp
 testpdb_LIBS += testutils pdbcore pvAccess pvData $(EPICS_BASE_IOC_LIBS)
 TESTS += testpdb
 
+endif # DEVEL
+
 PROD_HOST += check_consist
 check_consist_SRCS += check_consist.cpp
 check_consist_LIBS += testutils pvAccess pvData Com