1.6 X/Open Portability Guide Considerations

Table 1-4 lists the routines described in this manual that conform to the requirements of the X/Open Portability Guide, Version 4 (XPG4), or are implemented as UNIX extensions to the XPG4 standard (XPG4-UNIX). Descriptions of these routines appear in Chapter 2 under the generic function name listed in Table 1-4. Platform-specific entry-points are listed in Appendix B.

Table 1-4 XPG4 Conformant Routines

Routine	Conforms to Standard	Generic Function Name
acos	XPG4	acos
acosh	XPG4-UNIX	acosh
asin	XPG4	asin
asinh	XPG4-UNIX	asinh
atan	XPG4	atan
atan2	XPG4	atan
atanh	XPG4-UNIX	atanh
ceil	XPG4	ceil
cos	XPG4	cos
cosh	XPG4	cosh
cot	XPG4	cot
erf	XPG4	erf
erfc	XPG4	erf
exp	XPG4	exp
expm1	XPG4-UNIX	exp
fabs	XPG4	fabs
floor	XPG4	floor
fmod	XPG4	fmod
frexp	XPG4	frexp
gamma	XPG4	lgamma
hypot	XPG4	hypot
ilogb	XPG4-UNIX	ilogb
isnan	XPG4	isnan
j0	XPG4	bessel
j1	XPG4	bessel
jn	XPG4	bessel
ldexp	XPG4	ldexp
lgamma	XPG4	lgamma
log	XPG4	log
log10	XPG4	log
log1p	XPG4-UNIX	log
logb	XPG4-UNIX	logb
modf	XPG4	modf
nextafter	XPG4-UNIX	nextafter
pow	XPG4	pow
remainder	XPG4-UNIX	remainder
rint	XPG4-UNIX	rint
scalb	XPG4-UNIX	scalb
sin	XPG4	sin
sinh	XPG4	sinh
tan	XPG4	tan
tanh	XPG4	tanh
y0	XPG4	bessel
y1	XPG4	bessel
yn	XPG4	bessel