[GRASS-user] Problem installing GRASS 6.4.1 on Ubuntu 11.x

[Thomas Adams]

  Glynn,

Thanks for the explanation; previously, when compiling from source, 
things just compiled very cleanly for me as I blithely went about the 
installs. (I had no idea what 'PIC' meant and -thought- shared libraries 
were were being built for FFTW using it).

At some point I want to try developing some GRASS modules, so 
understanding some of these compilation intricacies is obviously 
important. It's a learning process and I appreciate your patience…

Tom

On 6/22/11 7:46 AM, Glynn Clements wrote:
> Thomas.Adams at noaa.gov wrote:
>
>> I keep having problems with fftw, which really surprises me. I get:
>> If I go into: /home/teaiii/rgrass_dir/grass-6.4.1/lib/gmath and make, I get:
>>
>> gcc -shared -o /home/teaiii/rgrass_dir/grass-6.4.1/dist.x86_64-unknown-linux-gnu/lib/libgrass_gmath.6.4.1.so -L/home/teaiii/rgrass_dir/grass-6.4.1/dist.x86_64-unknown-linux-gnu/lib -Wl,--export-dynamic -Wl,-rpath-link,/home/teaiii/rgrass_dir/grass-6.4.1/dist.x86_64-unknown-linux-gnu/lib -L/usr/local/pgsql/lib   OBJ.x86_64-unknown-linux-gnu/brent.o OBJ.x86_64-unknown-linux-gnu/dalloc.o OBJ.x86_64-unknown-linux-gnu/del2g.o OBJ.x86_64-unknown-linux-gnu/eigen.o OBJ.x86_64-unknown-linux-gnu/eigen_tools.o OBJ.x86_64-unknown-linux-gnu/fft.o OBJ.x86_64-unknown-linux-gnu/findzc.o OBJ.x86_64-unknown-linux-gnu/gauss.o OBJ.x86_64-unknown-linux-gnu/getg.o OBJ.x86_64-unknown-linux-gnu/ialloc.o OBJ.x86_64-unknown-linux-gnu/jacobi.o OBJ.x86_64-unknown-linux-gnu/la.o OBJ.x86_64-unknown-linux-gnu/lu.o OBJ.x86_64-unknown-linux-gnu/max_pow2.o OBJ.x86_64-unknown-linux-gnu/mult.o OBJ.x86_64-unknown-linux-gnu/rand1.o OBJ.x86_64-unknown-linux-gnu/svd.o -lgrass_gis -lgrass_datetime -lz     -lfftw !
>   -l
>> m   -lm&&  \
>> 	(cd /home/teaiii/rgrass_dir/grass-6.4.1/dist.x86_64-unknown-linux-gnu/lib; ln -f -s libgrass_gmath.6.4.1.so /home/teaiii/rgrass_dir/grass-6.4.1/dist.x86_64-unknown-linux-gnu/lib/libgrass_gmath.so)
>> /usr/bin/ld: /usr/local/lib/libfftw.a(fftwnd.o): relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a shared object; recompile with -fPIC
>> /usr/local/lib/libfftw.a: could not read symbols: Bad value
> Are there no pre-built FFTW packages? FWIW:
>
> 	http://packages.ubuntu.com/search?keywords=fftw-dev
>
> As you've already noticed, the problem is due to the lack of PIC
> (position-independent code) within the static FFTW library, which
> means that shared libraries cannot be linked against it.
>
> Enabling PIC for FFTW will fix that, but building FFTW as a shared
> library is better, and using the OS's offical FFTW packages (if they
> exist) is better still.
>


-- 
Thomas E Adams
National Weather Service
Ohio River Forecast Center
1901 South State Route 134
Wilmington, OH 45177

EMAIL:	thomas.adams at noaa.gov

VOICE:	937-383-0528
FAX:	937-383-0033