[PATCH v3 1/3] Cleanup __ieee754_sqrt(f/l)

[Wilco Dijkstra]

Joseph Myers wrote:

> If the benchmarks are compiled without _ISOMAC being defined, that's the 
> bug that should be fixed.  Changing them to use math/math.h is definitely 
> wrong.

Unfortunately it's not possible to define _ISOMAC since many tests actually require
internal headers, for example the string benchmarks often need inhibit_loop_to_libcall
which is defined only if _ISOMAC is not defined.

Defining _ISOMAC just for the math tests seems to work though, that looks like a
reasonable workaround for now.

Wilco