fenv h status - chasonr/djgpp-lib GitHub Wiki

fenv.h provides all functions, types and macros required by C11/C17. SuSv4 imposes no requirements for fenv.h above those of C11/C17.

An additional exception is provided, as FE_SUBNORMAL (with FE_DENORMAL as a synonym). No means is provided to enable exception traps.

An ieeefp.h header purports to specify similar capabilities to fenv.h, but the functions declared in ieeefp.h are not defined anywhere.