#  N.B. the previous line should be blank.
#+
#  Name:
#     ndg_link

#  Purpose:
#     Generate linker (ld) arguments for linking against the standalone
#     NDG library.

#  Type of Module:
#     Shell script.

#  Description:
#     This script should be invoked by those building standalone
#     applications that use the NDG library in order to generate the
#     correct arguments for the compiler (or ld) command.  The arguments
#     generated are written to the standard output.

#  Invocation
#     The script is normally invoked as part of a compiler command line,
#     such as:
#
#        f77 -o program -L/star/lib `ndg_link [ndf_switches]` program.f
#
#     The possible values for [ndf_switches] are the same as those available
#     to the ndf_link command.

#  Copyright:
#     Copyright (C) 1994 Science & Engineering Research Council.
#     Copyright (C) 1997, 1999 Central Laboratory of the Research Councils.
#     Copyright (C) 2004 Particle Physics & Astronomy Research Council.
#     Copyright (C) 2009 Science & Technology Research Council.
#     All Rights Reserved.

#  Licence:
#     This program is free software; you can redistribute it and/or
#     modify it under the terms of the GNU General Public License as
#     published by the Free Software Foundation; either Version 2 of
#     the License, or (at your option) any later version.
#     
#     This program is distributed in the hope that it will be
#     useful, but WITHOUT ANY WARRANTY; without even the implied
#     warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
#     PURPOSE. See the GNU General Public License for more details.
#     
#     You should have received a copy of the GNU General Public License
#     along with this program; if not, write to the Free Software
#     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
#     02110-1301, USA.

#  Authors:
#     RFWS: R.F. Warren-Smith (STARLINK, RAL)
#     DSB: David Berry (STARLINK)
#     MJC: Malcolm J. Currie (STARLINK)
#     TIMJ: Tim Jenness (JAC, Hawaii)
#     {enter_new_authors_here}

#  History:
#     2-JUN-1994 (RFWS):
#        Original template.
#     14-JUL-1997 (RFWS)
#        Added AST_ linking and improved "awk" script.
#     14-SEP-1999 (DSB)
#        Initial NDG version.
#     3-SEP-2004 (TIMJ):
#        Add one_link (after replacing ndg1_wild with one_find_file in 
#        the code).
#     30-JUN-2009 (DSB):
#        Add atl_link for new provenance.
#     2009 August 13 (MJC):
#        Added prologue and comments.
#     18-AUG-2009 (TIMJ):
#        Added ndf_switches handling to pass on any AST linker options.
#     {enter_further_changes_here}

#-

#  All command-line switches are assumed to be for NDF.
ndf_options=${1+"$@"}

#  Echo the NDG library reference, followed by the list of options for
#  packages on which the NDG library depends.  Pass the result through an
#  awk script to remove duplicate library references.
echo -lndg `grp_link` `chr_link` `ndf_link $ndf_options` `atl_link` `one_link` \
| awk '{for(f=NF;f;f--)if(!w[$f]++)l=$f" "l;print l}'

#  End of script.