Index: lib/Comms/Comms.pri
===================================================================
diff -u -ra5781739bcbe58c754aff8861561495624bc5b67 -r600639f9bd7c3d9a0cededd5e0dfe74eeeb5c9fc
--- lib/Comms/Comms.pri	(.../Comms.pri)	(revision a5781739bcbe58c754aff8861561495624bc5b67)
+++ lib/Comms/Comms.pri	(.../Comms.pri)	(revision 600639f9bd7c3d9a0cededd5e0dfe74eeeb5c9fc)
@@ -11,3 +11,8 @@
 
 INCLUDEPATH += $$COMMS_ROOT/include
 LIBS        += -L$$COMMS_ROOT/lib -lComms
+
+# Update rpath so shared lib is found during runtime.
+# Use COMMS_ROOT so in-tree builds find the in-tree lib.
+# Installed builds will find install path via $$PREFIX/lib.
+QMAKE_RPATHDIR += $$COMMS_ROOT/lib
Index: lib/MsgUtils/MsgUtils.pri
===================================================================
diff -u -ra5781739bcbe58c754aff8861561495624bc5b67 -r600639f9bd7c3d9a0cededd5e0dfe74eeeb5c9fc
--- lib/MsgUtils/MsgUtils.pri	(.../MsgUtils.pri)	(revision a5781739bcbe58c754aff8861561495624bc5b67)
+++ lib/MsgUtils/MsgUtils.pri	(.../MsgUtils.pri)	(revision 600639f9bd7c3d9a0cededd5e0dfe74eeeb5c9fc)
@@ -13,3 +13,8 @@
 
 INCLUDEPATH += $$MSGUTILS_ROOT/include
 LIBS        += -L$$MSGUTILS_ROOT/lib -lMsgUtils -lprotobuf
+
+# Update rpath so shared lib is found during runtime.
+# Use MSGUTILS_ROOT so in-tree builds find the in-tree lib.
+# Installed builds will find install path via $$PREFIX/lib.
+QMAKE_RPATHDIR += $$MSGUTILS_ROOT/lib