[GRASSLIST:3877] fftw.so.2 error fixed

[Carlos Henrique Grohmann]

So, for those with the ps.map problem with d.m in grass 5.7, it is possible to
fix by installing fftw2.15, which will provide libfftw.so.2, and will be
necessary to make a link to it named lidfftw.so.2, in /usr/lib.
the package can be found in rpm format (I guess that mandrake uses it) and in
tgz (for slack users). 

if anyone needs the tgz package, I can send it.

cheers

Carlos
-- 
+-------------------------------------------------+
        Carlos Henrique Grohmann - Guano  
  Geologist M.Sc - PhD Student at IGc-USP - Brazil
     Linux User #89721  - guano at usp dot br -
+-------------------------------------------------+


Citando Glynn Clements <glynn.clements at virgin.net>:

> 
> Carlos Henrique Grohmann wrote:
> 
> > I am trying to make GRASS 5.7 run on Slackware 10.0. until
> > yesterday, I couldn't compile it, so I download the CVS-HEAD for 5.3
> > and 5.7, used the configuration script and it compiled OK. the
> > problem now is that d.m won't run. here is the error msg:
> > 
> > GRASS 5.7.cvs:~ > d.m &
> > [1] 25635
> > GRASS 5.7.cvs:~ > Error in startup script: ps.map: error while loading
> shared
> > libraries: libdfftw.so.2: cannot open shared object file: No such file or
> > directory
> >     while executing
> > "exec ps.map -p"
> 
> > So, why it have to call ps.map?
> 
> It runs "ps.map -p", which outputs a list of the paper sizes which
> ps.map understands. This list is used to initialise the "Paper format"
> combo box in the print dialog.
> 
> > and why ps.map needs fftw?
> 
> It is linked against the gmath library, which in turn requires FFTW. 
> However, I can't see an obvious reason for the gmath dependency.
> 
> > I have ftw versions 2.15 and 3.0.1 installed, but no libdfftw.so.2.
> 
> One possibility is that libfftw was compiled as libdfftw.so.2 then
> renamed to something else (e.g. libfftw.so.2). That won't work. Shared
> libraries have their "soname" (shared object name) compiled into them,
> and that name is stored in any executables which are linked against
> it, and that is the name which the loader will look for when loading
> the executables.
> 
> > if I made a link to other file will it work?
> 
> Yes.
> 
> > (like I have to do with
> > tcl and tk 8.3 to get NVIZ working). I yes, from what file
> 
> Whichever file the linker used when it linked libgrass_gmath.so. Look
> for the definition of FFTWLIB in include/Make/Platform.make. That will
> contain either "-lfftw" or "-ldfftw", possibly in addition to a -L
> switch. For the former, you need to locate a symlink or file named
> libfftw.so, typically in /usr/lib or /usr/local/lib; for the latter,
> you need to locate libdfftw.so.
> 
> > and where should the link be?
> 
> Anywhere that the loader will find it, i.e. in /usr/lib or in any of
> the directories listed in /etc/ld.so.conf. Also, you need to run
> ldconfig once the link has been added.
> 
> -- 
> Glynn Clements <glynn.clements at virgin.net>
> 
>