by the Open Source Security Foundation (OpenSSF) Best Practices Working Group, 2025-03-28 This document is a guide for compiler and linker options that contribute to delivering reliable and secure code using native (or cross) toolchains for C and C++. The objective of compiler options hardening is to produce application binaries (executables) with security mechanisms against potential attacks and/or misbehavior. Hardened compiler options should also produce applications that integrate well with ...