Comment # 6 on bug 1207989 from Stefan Br���ns

Some context for the deprecated functions:

Most were already deprecated in LAPACK 3.1 (atleast), released in June 2006.
Only outlier is xGGSVD, which was only deprecated in LAPACK 3.6 (released
November 2015).

AFAICS, the deprecated functions all have replacements which are strict
supersets. E.g. xGEGS vs xGGES, the later only adds a SORT parameter, and when
SORT='N', both behave identical.

Unfortunately, the deprecated functions are open coded instead of being trivial
wrappers around the current ones.