When using the top-level configure script but subdir Makefiles, the
newlib_basedir value gets a bit out of sync: it's relative to where
configure lives, not where the Makefile lives. Move the abs setting
from the top-level configure script into acinclude.m4 so we can rely
on it being available everywhere. Although this commit doesn't use
it anywhere, just lays the groundwork.
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.
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