[GRASSLIST:1125] Re: Advise for first program in c

[Eric G . Miller]

On Mon, Nov 13, 2000 at 10:26:25PM -0800, David Finlayson wrote:
> Grass users,
> 
> I am interested in trying to build a C program that
> accesses GRASS and have a few questions (I'm not a
> programmer).
> 
> I am interesting in writing a routine that traces the
> profile of a river and builds an ascii table of x,y
> coordinate pairs and columns of values associated with
> user-supplied list of rasters.  The idea is to trace a
> river profile and dump out the associated variables
> for each pixel on the river, say manning's n,
> elevation, width, slope etc... Really though, it is
> just a simple program to try in C.
> 
> First, do I need to have a full copy of the source
> code for GRASS or can I work with a binary only
> version and just link against the libraries I need
> mentioned in the programmers manual?  (I've never used
> make before either so I don't understand that yet
> either)
> 
> Any first time advise would be appreciated.

I think you need the full source code.  GRASS has it's own "make"
routine called "gmake[5]" that takes care of much of the dirty work.
There are some examples in the programming manual, as well as the source
code (which really can be invaluable).

Good Luck,
-- 
Eric G. Miller <egm2 at jps.net>
"Time is Free"