stdckdint.h# Macros# MacroStatusC23 SectionPOSIX Docs __STDC_VERSION_STDCKDINT_H__✓Implemented7.20 ↗– ckd_add✓Implemented7.20.1 ↗– ckd_mul✓Implemented7.20.1 ↗– ckd_sub✓Implemented7.20.1 ↗–