Announcing libffi 3.4.2

[Anthony Green]

I'm very pleased to announce the release of libffi version 3.4.2, which
you are free to download here:

  https://github.com/libffi/libffi/releases/download/v3.4.2/libffi-3.4.2.tar.gz

Here are some of the highlights of this release:

    3.4.2 Jun-28-21
        Add static trampoline support for Linux on x86_64 and ARM64.
        Add support for Alibaba's CSKY architecture.
        Add support for Kalray's KVX architecture.
        Add support for Intel Control-flow Enforcement Technology (CET).
        Add support for ARM Pointer Authentication (PA).
        Fix 32-bit PPC regression.
        Fix MIPS soft-float problem.
        Enable tmpdir override with the $LIBFFI_TMPDIR environment variable.
        Enable compatibility with MSVC runtime stack checking.
        Reject float and small integer argument in ffi_prep_cif_var().
          Callers must promote these types themselves.

Of particular note is Madhavan Venkataraman's static trampoline work,
as it can eliminate
the need for writeable/executable memory under certain conditions.

As usual, many thanks to all of the contributors!

Check out the following links for more details:
 https://sourceware.org/libffi
 https://github.com/libffi/libffi

Have fun!

Anthony Green
green@moxielogic.com
https://twitter.com/antgreen