Now that we use AC_NO_EXECUTABLES, and we require a recent version of
autoconf, we don't need to define our own copies of these macros. So
switch to the standard AC_PROG_CC.
This directory was an experiment to use floating-point operations to implement
the math library when a processor had a floating-point instruction set. The
experiment was a failure in that some of the algorithms chosen (e.g. recursive
algorithms for sin/cos, etc..) are too simple and do not provide proper accuracy
nor handle very large or very small inputs adequately.
The code is considered moth-balled. The stable math library routines can be
found in libm/math and the configuration option to use this has been removed.
If you wish to experiment with the concept, please feel free and report back if
you have major improvements.
b9346cee1a