Compilation and Linking

All the necessary compilation and linking is handled by the Starlink utility alink. The general format of an alink command is,

% alink code options libraries

• code - a list of filenames containing the code to be compiled. Can be either a Fortran file ( simple.f) or an object file ( simple.o).

• options - compiler options for the linking stage, common choices are -g for de-bugable code and -O for optimised code.

• libraries - a list of libraries required for the linking stage. The ASTERIX utility ast_link_adam is used here, enclosed in `back-quotes`, causing it to be expanded on the command line. On the Birmingham Suns this produces,

  -L/star/asterix/sun4_Solaris/lib -lastlib_adam -lastlib -lwfclib -lcat \
  -L/star/lib -lfitsio -lref -lhds -lprm -lprm_a -lard_adam -lsla -lgrp_adam \
  -lgrp -lerr -lerr_adam -lpsx -lcnf -lfio_adam -lfio -lastpda -lpda -lems -lchr
  

Thus the executable application simple can be produced with the following command,

% alink simple.f `ast_link_adam`
dtask_applic.f:
        dtask_applic:
./simple.f:
        simple:
        simple_task:
Linking:

All trace of the dtask_applic wrapper is removed after linking. The final executable binary will have a size of 2+ Mb due to all the linked libraries.