Compiling fuzzer

[electricworry]

I'm trying to build FreeRADIUS with the fuzzers, but I'm running into
some problems. Can anyone please point out what I'm doing wrong?

First up I appended "CFLAGS += -fsanitize=fuzzer" to Make.inc.in
before running ./configure. Next I had to amend my configure command
so that clang is used:

    ./configure CC=clang

Next I ran into linking issues because not all binaries have LibFuzzer
targets (as I would expect) so I appended again to Make.inc.in
"LDFLAGS += -fsanitize=fuzzer-no-link" (which is probably the wrong
direction). At the stage of compiling src/bin/fuzzer.c I get an error:

    CC src/bin/fuzzer.c
    src/bin/fuzzer.c:111:25: error: use of undeclared identifier
'dl_module_loader'
            dl_search_path_prepend(dl_module_loader->dl_loader, lib_dir);

What am I missing? Looking at the makefiles it looks like it should
build out of the box but I seem to be missing something.