DEF_C99_BUILTIN (BUILT_IN_CPOW, "cpow", BT_FN_COMPLEX_DOUBLE_COMPLEX_DOUBLE_COMPLEX_DOUBLE, ATTR_MATHFN_FPROUNDING)
DEF_C99_BUILTIN (BUILT_IN_CPOWF, "cpowf", BT_FN_COMPLEX_FLOAT_COMPLEX_FLOAT_COMPLEX_FLOAT, ATTR_MATHFN_FPROUNDING)
DEF_C99_BUILTIN (BUILT_IN_CPOWL, "cpowl", BT_FN_COMPLEX_LONGDOUBLE_COMPLEX_LONGDOUBLE_COMPLEX_LONGDOUBLE, ATTR_MATHFN_FPROUNDING)
-DEF_C99_BUILTIN (BUILT_IN_CPROJ, "cproj", BT_FN_COMPLEX_DOUBLE_COMPLEX_DOUBLE, ATTR_MATHFN_FPROUNDING)
-DEF_C99_BUILTIN (BUILT_IN_CPROJF, "cprojf", BT_FN_COMPLEX_FLOAT_COMPLEX_FLOAT, ATTR_MATHFN_FPROUNDING)
-DEF_C99_BUILTIN (BUILT_IN_CPROJL, "cprojl", BT_FN_COMPLEX_LONGDOUBLE_COMPLEX_LONGDOUBLE, ATTR_MATHFN_FPROUNDING)
+DEF_C99_BUILTIN (BUILT_IN_CPROJ, "cproj", BT_FN_COMPLEX_DOUBLE_COMPLEX_DOUBLE, ATTR_CONST_NOTHROW_LIST)
+DEF_C99_BUILTIN (BUILT_IN_CPROJF, "cprojf", BT_FN_COMPLEX_FLOAT_COMPLEX_FLOAT, ATTR_CONST_NOTHROW_LIST)
+DEF_C99_BUILTIN (BUILT_IN_CPROJL, "cprojl", BT_FN_COMPLEX_LONGDOUBLE_COMPLEX_LONGDOUBLE, ATTR_CONST_NOTHROW_LIST)
DEF_C99_BUILTIN (BUILT_IN_CREAL, "creal", BT_FN_DOUBLE_COMPLEX_DOUBLE, ATTR_CONST_NOTHROW_LIST)
DEF_C99_BUILTIN (BUILT_IN_CREALF, "crealf", BT_FN_FLOAT_COMPLEX_FLOAT, ATTR_CONST_NOTHROW_LIST)
DEF_C99_BUILTIN (BUILT_IN_CREALL, "creall", BT_FN_LONGDOUBLE_COMPLEX_LONGDOUBLE, ATTR_CONST_NOTHROW_LIST)