fdilibm was originally meant to see _IEEE_LIBM defined from outside the
libm code, not it being hardcoded in. Picolibc assumes this assumption
holds true and attempts to define itself, conflicting with the existing
definition.
Signed-off-by: Alessandro Gatti <a.gatti@frob.it>
This directory contains third-party, low-level C libraries and SDKs.
Libraries that do not target any specific platform are generally chosen
based on them being independent and efficient.