Good candidate for stdlib.

or more generally, parity with math.h from C

or more generally, parity with math.h from C

After a brief discussion of this in JoR (Journal of Requirements) at the WG5 meeting this week, if there is a strong use case for this, please make it.

In general, feature parity with C math.h (in and of itself) doesn't appear to be a high priority for Fortran standards committee.

The best way to get this moved on to the "We really should do it" list is to make a strong use case for it ho help justify the return on investment for implementers.

It's not about feature parity with C, it's about feature parity with the modern IEEE-754 standard for floating-point arithmetic. log2 is one member of its list of recommended functions, and Fortran already has most of the rest.

The best way to get this moved on to the "We really should do it" list is to make a strong use case for it ho help justify the return on investment for implementers.

Peter's argument works for me, too. I'll see what I can do to help move this forward.

From Table 9.1 from IEEE-754

• exp
• expm1
• exp2
• exp2m1
• exp10
• exp10m1
• log
• log2
• log10
• logp1
• log2p1
• log10p1
• hypot
• rSqrt
• compound
• rootn
• pown
• sin
• cos
• tan
• sinPi
• cosPi
• tanPi
• asin
• acos
• atan
• atan2
• sinh
• cosh
• tanh
• acosh
• atanh