[Caml-list] OCaml 4.10.1, release candidate

[Caml-list] OCaml 4.10.1, release candidate

[Florian Angeletti]

Dear OCaml users,

Along with OCaml 4.11.0, a bugfix release of OCaml version 4.10.1 is 
imminent.
This new version is collection of safe configuration, build system
and runtime fixes cherry-picked from the 4.11 development cycle.
It should be completely safe to upgrade to this version from OCaml 4.10.0.

The source code is available at these addresses:

https://github.com/ocaml/ocaml/archive/4.10.1+rc1.tar.gz
https://caml.inria.fr/pub/distrib/ocaml-4.10/ocaml-4.10.1+rc1.tar.gz

The compiler can also be installed as an OPAM switch with the following 
commands:

$ opam update
$ opam switch create ocaml-variants.4.10.1+rc1 
--repositories=default,beta=git://github.com/ocaml/ocaml-beta-repository.git

We want to know about any bugs. Please report them here:
https://github.com/ocaml/ocaml/issues

Happy hacking,
Florian Angeletti for the OCaml team.

OCaml 4.10.1 changes
--------------------
### Runtime system:

- #9344, #9368: Disable exception backtraces in bytecode programs
   built with "-output-complete-exe". At the moment, such programs do
   not embed debug information and exception backtraces where causing
   them to crash.
   (Jérémie Dimino, review by Nicolás Ojeda Bär)

### Build system:

- #9531: fix support for the BFD library on FreeBSD
   (Hannes Mehnert, review by Gabriel Scherer and David Allsopp)

### Bug fixes:

- #9068, #9437: ocamlopt -output-complete-obj failure on FreeBSD 12
   (Xavier Leroy, report by Hannes Mehnert, review by Sébastien Hinderer)

- #9165: Add missing -function-sections and -O3 flags in Makefiles.
   (Greta Yorsh, review by David Allsopp)

- #9495: fix a bug where bytecode binaries compiled with 
`-output-complete-exe`
   would not execute `at_exit` hooks at program termination (in particular,
   output channels would not be flushed).
   (Nicolás Ojeda Bär, review by David Allsopp)

- #9714, #9724: Use the C++ alignas keyword when compiling in C++ in MSVC.
   Fixes a bug with MSVC C++ 2015 onwards.
   (Antonin Décimo, review by David Allsopp and Xavier Leroy)

- #9736, #9749: Compaction must start in a heap where all free blocks are
   blue, which was not the case with the best-fit allocator.
   (Damien Doligez, report and review by Leo White)

### Tools:

- #9552: restore ocamloptp build and installation
   (Florian Angeletti, review by David Allsopp and Xavier Leroy)