5.7.4.2 Enforce-eh-specs Option

The -fenforce-eh-specs option generates code to check for violation of exception specifications at runtime. This is the default action if no option is specified.

The -fno-enforce-eh-specs form of this option omits generation of verification code, which violates the C++ standard, but doing so might reduce the code size in production builds of validated source. Even when specifying this option, the compiler will still optimize exception code based on the specifications, so throwing an unexpected exception will result in undefined behavior.