BRL-CAD is considered "extensively" portable given our long-standing history of running on everything from embedded systems to desktop systems to massive supercomputers. We actively seek out new computing platforms to help improve portability. The Raspberry Pi is an inexpensive ($25) computer the size of a credit card that typically runs Linux. We had a previous task that confirmed BRL-CAD will mostly compile with GCC 4.4 but there were internal compiler errors.
This task involves compiling BRL-CAD on a Raspberry Pi with a newer 4.7+ GCC compiler and running the BRL-CAD benchmark. WE WILL PROVIDE REMOTE SSH ACCESS to a Raspberry Pi that we've set up on the interview and is ready to go.
You will be tasked with downloading the BRL-CAD sources from our Subversion repository, running cmake, compiling at least enough of BRL-CAD to run the benchmark (make benchmark), and submitting the resulting benchmark performance log. If any step fails, you'll be expected to submit a complete transcript of what commands you ran to make sure it's not something simple we can fix or work around.
You will need to compile GCC 4.7+ yourself or it may be available precompiled online (see the references or do a search).
References
- http://en.wikipedia.org/wiki/Raspberry_Pi
- http://brlcad.org/wiki/Compiling
- http://raspberrypi.stackexchange.com/questions/1/how-do-i-build-a-gcc-4-7-toolchain-for-cross-compiling
git clone https://github.com/raspberrypi/tools.git --depth 1| File name/URL | File size | Date submitted | |
|---|---|---|---|
| make_debug_gcc4.7.log | 256.5 KB | January 04 2013 22:46 UTC | |
| make_gcc4.7_new.log | 10.9 MB | January 05 2013 10:20 UTC | |
| commands.txt | 236 bytes | January 05 2013 22:31 UTC | |
| d.log | 1.0 KB | January 05 2013 22:31 UTC | |
| cmake_debug-gcc4.7.log | 25.3 KB | January 11 2013 18:35 UTC | |
| make_debug-gcc4.7.log | 2.6 MB | January 11 2013 18:36 UTC |
I would like to work on this task.
This task has been assigned to Titi. You have 72 hours to complete this task, good luck!
The work on this task is ready to be reviewed.
Can you explain the steps you took? What commands did you run (exactly)?
Your build log seems to indicate that the installed compiler wasn't built or set up correctly. It's generating symbols for the wrong type of environment.
The errors look like they may be specific to g++ and C++ compilation, but it's hard to tell for sure without some testing.
How far does it get if you run "make benchmark"? What was your cmake configuration command?
One of the mentors has sent this task back for more work. Talk to the mentor(s) assigned to this task to satisfy the requirements needed to complete this task, submit your work again and mark the task as complete once you re-submit your work.
cmake .. -DBRLCAD_ENABLE_X11=OFF -DBRLCAD_BUNDLED_LIBS=ON -DCMAKE_BUILD_TYPE=Debug
make
CROSS_COMPILE=arm-bcm2708hardfp-linux-gnueabi--k VERBOSE=1 21 | tee make_debug.logHow to setup the compiler correctly?
but when i try to run the compiler its give me: -bash: ./arm-bcm2708hardfp-linux-gnueabi-gcc-4.7.1: cannot execute binary file
Can you help me?
The work on this task is ready to be reviewed.
You shouldn't need to cross-compile. Can you delete your CMakeCache.txt file and re-run cmake while capturing all output? Post that then try to also not cross-compile (while capturing all make output).
One of the mentors has sent this task back for more work. Talk to the mentor(s) assigned to this task to satisfy the requirements needed to complete this task, submit your work again and mark the task as complete once you re-submit your work.
I delete CMakeCache.txt an re-run cmake and the result is same.
When I try to no cross-compile it give me: brlcad@raspberrypi ~/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin $ ~/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc-4.7.2
-bash: /home/brlcad/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc-4.7.2: cannot execute binary file
The work on this task is ready to be reviewed.
Melange has detected that the deadline has passed and no more work can be submitted. The submitted work should be reviewed.
Titi, cannot execute binary file implies that the arm-bcm2708 compiler that you are attempting to use is the wrong compiler. The reference we provided was merely a guide, not instruction.
Have you tried to simply run: apt-get install gcc-4.7
One of the mentors has sent this task back for more work. Talk to the mentor(s) assigned to this task to satisfy the requirements needed to complete this task, submit your work again and mark the task as complete once you re-submit your work.
The deadline of the task has been extended with 2 days and 0 hours.
I tried but for this command I must to be sudo.
brlcad@raspberrypi ~ $ apt-get install gcc-4.7
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?
brlcad@raspberrypi ~ $ sudo apt-get install gcc-4.7
[sudo] password for brlcad:
brlcad is not in the sudoers file. This incident will be reported.
Looking to get it installed, I'll update you soon.
The deadline of the task has been extended with 1 days and 0 hours.
okay thanks
4.7 has been installed along with 4.6
Melange has detected that the final deadline has passed and it has reopened the task.
I would like to work on this task.
I am done but melange has reopened the task
This task has been assigned to Titi. You have 72 hours to complete this task, good luck!
The work on this task is ready to be reviewed.
Congratulations, this task has been completed successfully.
Now that looks like a much better compile attempt. I made a change to the file that failed (src/libfb/tcl.c) so it might actulaly complete successfully now if you run "svn update" in the source directory and try "make" again in the build directory.