B.21 Type-generic math <tgmath.h>
acos sqrt fmod nextafter
asin fabs frexp nexttoward
atan atan2 hypot remainder
acosh cbrt ilogb remquo
asinh ceil ldexp rint
atanh copysign lgamma round
cos erf llrint scalbn
sin erfc llround scalbln
tan exp2 log10 tgamma
cosh expm1 log1p trunc
sinh fdim log2 carg
tanh floor logb cimag
exp fma lrint conj
log fmax lround cproj
pow fmin nearbyint creal