Comment 43 for bug 856072

the "official" way to achieve that is for when all your code compiles to a program or library. Here, we have libmozutils, and the rest. The rest needs --wrap so that getaddrinfo() calls are properly redirected to __wrap_getaddrinfo and linked against the corresponding symbols in libmozutils. Libmozutils, on the other hand, just needs to declare __wrap_getaddrinfo functions, and these functions can just call getaddrinfo. No need for __real_getaddrinfo, no need for additional --wrap in memory/mozutils/Makefile.in. That was my point.