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-libffi-3.3 was released on November 23, 2019. Check the libffi web
+libffi-3.4 was released on TBD. Check the libffi web
page for updates: <URL:http://sourceware.org/libffi/>.
See the git log for details at http://github.com/libffi/libffi.
+ 3.4 TBD
+ Add support for Intel Control-flow Enforcement Technology (CET).
+ Fix 32-bit PPC regression.
+ Fix MIPS soft-float problem.
+
3.3 Nov-23-19
Add RISC-V support.
New API in support of GO closures.