[GRASS5] Angle of incidence in viewshed/line of sight

[Roger Bivand]

On Sun, 13 Mar 2005, Glynn Clements wrote:

> 
> Paul Kelly wrote:
> 
> > >> Did we not already decide that now that GRASS has shared libraries, it
> > >> only needs the header files to be included in the binary distribution?
> > >> Then only the new module needs to be compiled (and a script can be
> > >> written to do this automatically).
> > >> Radim may even have already done this (added the headers to the install).
> > >
> > > Am I completely wrong that for a module linking against say -lgis, you
> > > still need a copy of libgis.a somewhere on the -L?
> > 
> > Not if there is a shared library there--it can link against it instead.
> 
> I think that the point is that binary distributions should always
> include the libraries regardless of whether they are shared or static. 
> IIRC, we currently only include the libraries if they are shared
> libraries.

Yes, as of now 5.4.0 and 6.0.0 only install the *.so.

> 
> From a packaging (RPM etc) perspective, static libraries would
> normally go into a separate -devel package, along with the headers,
> while shared libraries would go into the main package.

That is an excellent idea - it would help the add-on modules a great deal. 
Today a user is reporting failure to compile gstat against 5.4.0, with the 
gstat configure:

 if test -d $with_grass ; then
  AC_DEFINE(HAVE_LIBGIS)
  LIBS="$LIBS -L $with_grass/lib"
  INCLUDES="$INCLUDES -I$with_grass/include" 
  AC_CHECK_LIB(grass_gis, G_gisinit, GISLIB="-lgrass_gis -lgrass_datetime",
   AC_CHECK_LIB(gis, G_gisinit, GISLIB="-lgis -ldatetime"))
  LIBS="$LIBS $GISLIB -lz"
 fi

failing when $with_grass is set properly (I believe, and have tried it 
myself) but /lib only has the *.so. This seems to be an example of the 
problems of not having *.a installed when needed for development.

Roger

> 
> 

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Breiviksveien 40, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93
e-mail: Roger.Bivand at nhh.no