Details
Major Description
a) the .res-file can't be used as a fallback if the memory-blob can't be loaded, but it should be the .dat-file (as far as I understood it)
b) loading the messages using a full file-path is deprecated (according to http://www.icu-project.org/apiref/icu4c/ures_8h.html#c4d72fc9f7cc63a05f646cabee4be167) and it really doesn't work
c) When using "make install" to install the library, the library libXercesMessages.so.28.0 doesn't get installed which leads to a unresolved symbol error when linking against libxerces-c.so.28.0
d) When trying to run a test or a sample linked against xerces-c++ built with ICU message loader support, xerces-c++ panics with the error "Cannot load message domain", whether or not libXercesMessages and the .res/.dat-file in /usr/msg are available or not. The patch I'm going to attach fixes this.