From IRC chat conversation:
andrewhsu: hmm...i notice that files like AbstractBuffer.cc is specified as a SOURCES for libTrafficServerStandalone and traffic_server. but ICP.cc is only specified as a SOURCES for traffic_server. it also looks like .Po files are created for all .cc files upon the first execution of `make`. it may be that ICP.Po is created but never used by the build system (because it already has traffic_server-ICP.Po). but for some reason files like AbstractBuffer.Po is created and then used in the final 'Makefile' that is generated.
I believe the fix is to not have the logstat, logcat, etc files LDADD the .o files directly, but instead have a static library shared between the linking of various binaries so the deps link up properly.
For now, workaround is to do `make clean` if you know you are changing a file that is not linked up properly with deps.
I'll take ownership of this jira.