An attempt at running the ELEFUNT test suite on a Cray EL-94 system
failed, because the C compiler does compile-time evaluation of
functions whose arguments can be determined to be constant, such as

	x = 0.0;
	y = alog(x);

Every one of the test programs has such code, sigh.

Compilation was then tried with the debug (-g) option; this produced
successful compilation and linking, but the tmacha executable failed
immediately with a floating-point exception in machar(), during the
computation of *xmax.
