This variable is a standard way to inject options for the C
preprocessor. It's respected by the implicit rules of make
and autoconf/automake.
Debian sets this variable during package build to inject
`-D_FORTIFY_SOURCE=2` and we would like afl++ to respect it.
Note that this commit also adds $(CFLAGS) in the build of
afl-performance.o where it was missing. It might have been
on purpose but we want to keep CFLAGS everywhere as well
since Debian injects various options through that variable
(for hardening and reproducibility).
Right now they are created pointing to '../afl-clang-fast' instead
of 'afl-clang-fast. Given that all the binaries are in the same directory,
the symlinks are effectively broken.
* Addition of AFL_FORKSRV_INIT_TMOUT env var
This commit introduces a new environment variable which allows to
specify the timespan AFL should wait for initial contact with the
forkserver.
This is useful for fuzz-targets requiring a rather long setup time
before the actual fuzzing can be started (e.g., unicorn).
* add .swp files to .gitignore
* Inherit init_tmout in afl_fsrv_init_dup
Without this patch, the forkserver would spawn with a timeout of 0 in
cmplog mode, leading to an immediate crash.
Additionally, this commit removes a spurious whitespace.
* Initialize afl->fsrv.init_tmout in afl_fsrv_init
Not all afl-components will need the new AFL_FORKSRV_INIT_TMOUT
environment variable. Hence, it's initialized to the safe "default"
value from before in afl_fsrv_init now.
