Forum: GNU Radio building problem

Hi everybody...

I hope someone will be able to help me. I have carefully red the
installing guide and after some reflexions, I wisely chose the
build-gnuradio script option. Therefore:

- I have installed Ubuntu 12.10 on my computer (I'm also new to Linux, I
installed it for gnuradio purpose), and
- I ran "wget http://www.sbrac.org/files/build-gnuradio && chmod a+x
./build-gnuradio && ./build-gnuradio --verbose" as recommanded
- my compiler seems to be gcc 4.7.2.

The process starts normally, until the compiler raise a "Unused but set
variable" warning and crashes:
**************************************************************************
 Scanning dependencies of target _gnuradio_core_general
[ 37%] Building CXX object
gnuradio-core/src/lib/swig/CMakeFiles/_gnuradio_core_general.dir/gnuradio_core_generalPYTHON_wrap.cxx.o
/home/guillaume/gnuradio/build/gnuradio-core/src/lib/swig/gnuradio_core_generalPYTHON_wrap.cxx:
In function ‘void init_gnuradio_core_general()’:
/home/guillaume/gnuradio/build/gnuradio-core/src/lib/swig/gnuradio_core_generalPYTHON_wrap.cxx:323876:21:
attention : variable ‘md’ set but not used [-Wunused-but-set-variable]
**************************************************************************

By performing on an other terminal the "top" command, I noticed that the
"cc1plus" command is in status "D" which is not very good... After kill
-9 command, I obtained the following messages:

**************************************************************************
c++: erreur interne du compilateur: Processus arrêté (program cc1plus)
Veuillez soumettre un rapport complet d'anomalies,
avec le source pré-traité si nécessaire.
Consultez <file:///usr/share/doc/gcc-4.7/README.Bugs> pour plus de
détail.
make[2]: ***
[gnuradio-core/src/lib/swig/CMakeFiles/_gnuradio_core_general.dir/gnuradio_core_generalPYTHON_wrap.cxx.o]
Erreur 4
make[1]: ***
[gnuradio-core/src/lib/swig/CMakeFiles/_gnuradio_core_general.dir/all]
Erreur 2
make: *** [all] Erreur 2
make failed
Exiting Gnu Radio build/install
**************************************************************************

I performed some google searches, gnuradio.org searches and searches on
this forum about
- building gnuradio with gcc 4.7.2 on ubuntu 12.10
- "Unused but set" warning on gcc 4.7,

but I found no useful answers.

Obviously, I could modify by myself the source code in order to remove
this "md" variable but I think this is not a "clean" way of proceeding,
since it's likely that I'm not the only one to cope with this issue.

The error is obviously due to the compiler and not Gnuradio, but it is
unknown in the gcc bug tracking list.
Have someone here already meet and solved this problem in a gnuradio
context? That would greatly help me since I'm far from being a compiler
expert...

thanks for your help,

- Guillaume

Hi Guillaume, did you resolve the problem?
I've the same problem in compiling gnuradio on my IGEPv2 with linaro OS.

thx

Luigi

Hi Luigi,

I still haven't resolved my problem, but I'm still investigating.

I found by looking forward on google that It is likely to be a RAM 
quantity problem due to the size of the currently compiled file 
(300kloc...) and that the warning appearing at that this very moment is 
just a coincidence. I'm not yet sur because the new RAM I bought were 
defectious and I had to send it back, waiting for a new one.

problem quite hard to diagnosize, and nobody on the forum have been able 
to help me, so I feel quite alone! I'll post here if my new RAM works 
well.

For information my former RAM was 512M, and I am currently trying to 
extend it to 1.2G (I use a HP Pavilion zv 6000 laptop with AMD64 
processor, Ubuntu 12.10 in dual boot with windows XP SP2).

If you have a similar RAM quantity, please tell me, it would confort me 
in my diagnostic!

bye,

- Guillaume

Even I faced a similar problem with the build getting stuck and then 
getting aborted at 40% ( of cmake!!).

I was installing it on ubuntu 12.04  virtual machine with windows 7 as 
host. The virtual machine was configured to have 512MB RAM.

Taking clue from the above post I increased the RAM to 1200 MB.

And voila, the installation went through smoothly.


Regards
Purush

Thank You guys for your answers.

I still haven't resolved my problem and I think that purush_m gave the 
correct answer.

My problem now is that I can't update RAM because I'm installing 
GNURadio on IGEPv2 board 
(http://www.isee.biz/products/processor-boards/igepv2-board).

Now I'm trying to create a big swap memory on the microSD and I will 
tell you the results.

Best Regards

Luigi