Reproducible on 3.9, 3.10, and on main.

The --with-memory-sanitizer option adds "-fsanitize=memory -fsanitize-memory-track-origins=2 -fno-omit-frame-pointer" to CFLAGS, and "-fsanitize=memory -fsanitize-memory-track-origins=2" to LDFLAGS. The MemorySanitizer is a clang specific feature, AFAIK. You're using GCC, so what happens is that these (GCC incompatible) flags are added and the following compile check (getaddrinfo) fails.


IMO, adding a compiler check and printing a warning if --with-memory-sanitizer is used with GCC should be an ok solution. Alternatively, we inform the user that we're switching to using the leak sanitiser, if we're on GCC.


+pablo

See also:
  - https://gcc.gnu.org/onlinedocs/gcc/Instrumentation-Options.html
  - https://clang.llvm.org/docs/MemorySanitizer.html