UPX 4.0 UPX is a free, secure, portable, extendable, high-performance executable packer for several executable formats. Please also see the Wikipedia entry for some more background info about UPX and executable compression. Changes in 4.0.0 (2022 Oct 28): * Switch to semantic versioning * SECURITY NOTES: emphasize the security context in the docs * Support easy building from source code with CMa..
