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.