2.5 The external directory
The $XASTOP/external directory contains the source files of
library subroutines which were not developed as part of XAS, but were
procured externally. The resulting relocatable libraries must be generated
in the same place as XAS libraries, but this
will not be done using xasbuild (it is either
done by tools provided with the library or has to be done by the user).
Current external libraries are the following (it shall be noted that each
of them is used only by a very small number of XAS programs) ;
there is a subdirectory per library.
Fortran sources for FITSIO 4.14. FITSIO routines are used only by the
fromfits, tofits, fromogip, toogip command. They were compiled and tested
with version 4.14. Usage with later release at user's risk.
Fortran and C routines provided by SSD (with a front-end wrapper by Daniele
Dal Fiume) used mainly by the saxauxcalc command to compute auxiliary
quantities (function of orbit and attitude data).
currently empty, preserved for historical reasons (PGPLOT was used in some
early graphics demos, and replaced by a dummy wrapper on non-VMS systems).
No longer in use.