D3676: fuzzutil: make it possible to use absl when C++17 isn't supported

[durin42 (Augie Fackler)]

durin42 added a comment.


  In https://phab.mercurial-scm.org/D3676#57722, @indygreg wrote:
  
  > I'm assuming https://abseil.io/ is part of the standard environment in oss-fuzz. Otherwise, we may want to vendor it or provide a script to download it or something.
  
  
  Actually, it's not needed on oss-fuzz because we have a C++17 compiler there. This just leaves the hooks in place so that it's easy-ish to build the fuzzers when you don't have a C++17 compiler (which I don't when building out of Piper, which gives me some insane options for running the fuzzer.)
  
  I can live without this patch, but I'd rather we have it in place so that it's easy to drop a copy of abseil on a machine if needed when doing fuzzer work.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D3676

To: durin42, #hg-reviewers
Cc: indygreg, mercurial-devel