The biggest change in this release is support for the /opt/fil distribution, which allows you to install Fil-C and a collection of useful programs compiled with Fil-C in /opt/fil.

Other changes include:

• Add just enough Yolo FFI support to allow OpenSSL to use its constant time crypto implementations that are written in assembly.
• Fix C++ inline global variables.
• Add support for the PR_SET_SECCOMP mode of prctl(2) so that OpenSSH's seccomp sandbox works.
• Make the compiler driver understand /opt/fil.
• Fix alignment issues involving by-val structs that contain SIMD vectors.

Guide to the available files:

• filc-0.673-linux-x86_64.tar.xz is the traditional, self-contained "pizfix" distribution. It only includes the compiler, doesn't require root, and is based on the musl libc. This is recommended for quickly trying out Fil-C.
• optfil-0.673-linux-x86_64.tar.xz is the new /opt/fil distribution. It includes useful programs like OpenSSH client and server, is based on glibc 2.40, and requires root permissions. This is recommended for giving Fil-C deeper scrutiny.