Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Gilles, I installed the 4.8 series of compilers on the Pi 2 (gcc, g++, and gfortran). I did a fresh untar of openmpi-1.8.5. I set the environment variables CC, CXX, and FC to point to the 4.8 compilers. However, the build failed again. Making all in config make[1]: Entering directory

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Jeff, Raspbian is built for armv6 (unlike linaro which is built for armv7) that being said, you are running on an armv7 cpu, so i am not sure "cross-compiling" is appropriate. (e.g. if you run a 32 bits gcc binary on an x86_64 os to build a x86_64 binary, is this called cross compilation ?)

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Gilles, I was looking in Raspbian a little and do you know what I found? When I do "gcc -v" it says it was built with "--with-arch=armv6". Since I'm trying to compile on a Pi 2, doesn't this mean I'm cross-compiling? Thanks! Jeff Jeff, btw, did you try a pI 1 before a pi2 ? I checked some

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Gilles, Let me know if you think I should upgrade to gcc-4.8 and I'll try it. Thanks! Jeff Jeff, btw, did you try a pI 1 before a pi2 ? I checked some forums, and you will likely have to upgrade gcc to 4.8 a simpler option could be linaro

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Gilles, No I didn't. This is a fresh Raspbian for the Pi 2. I'm using the 05-05-raspbian-wheezy image, plus I did ant apt-get update about a week ago. Thanks! Jeff Jeff, btw, did you try a pI 1 before a pi2 ? I checked some forums, and you will likely have to upgrade gcc to 4.8 a simpler

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Gilles, Yes I can. I tried a simple C code ("hello world") and it compiled and ran correctly. Thanks! Jeff Jeff, can you gcc -march=armv7-a foo.c Cheers, Gilles On Tuesday, June 9, 2015, Jeff Layton > wrote: Gilles, I'm not

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Jeff, btw, did you try a pI 1 before a pi2 ? I checked some forums, and you will likely have to upgrade gcc to 4.8 a simpler option could be linaro https://www.raspberrypi.org/forums/viewtopic.php?f=56=98997 Cheers, Gilles On Tuesday, June 9, 2015, Gilles Gouaillardet

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Jeff, can you gcc -march=armv7-a foo.c Cheers, Gilles On Tuesday, June 9, 2015, Jeff Layton wrote: > Gilles, > > I'm not cross-compiling - I'm building on the Pi 2. > > I'm not sure how to check if gcc can generate armv7 code. > I'm using Raspbian and I'm just using the

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Gilles, I'm not cross-compiling - I'm building on the Pi 2. I'm not sure how to check if gcc can generate armv7 code. I'm using Raspbian and I'm just using the default compilers that come with it (I think it's gcc 4.6.3). Thanks! Jeff Jeff, dmb is available only on ARMv7 (Pi 2) if i

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Jeff, dmb is available only on ARMv7 (Pi 2) if i remember correctly, you are building Open MPI on ARMv7 as well (Pi 2), so this is not a cross compilation issue. if you configure with -march=armv7, the relevant log is libtool: compile: gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I../../opal/include

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Jeff, Sorry - I was traveling for a week and didn't have to the RPi. What happens if you don't supply CCASFLAGS at all? The output from "make" is below. It died when it tried to compile atomic-local. It says the processor doesn't support ARM mode "dmb". Thanks! Jeff pi@raspberrypi

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

On May 30, 2015, at 9:42 AM, Jeff Layton wrote: > > The error happens during the configure step before compiling. Hmm -- I'm confused. You show output from "make" in your previous mails...? > However, I ran the make command as you indicated and I'm > attaching the output to

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Jeff, The error happens during the configure step before compiling. However, I ran the make command as you indicated and I'm attaching the output to this email. Thanks! Jeff Can you send the output of "make V=1"? That will show the exact command line that is being used to build that file.

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Can you send the output of "make V=1"? That will show the exact command line that is being used to build that file. > On May 29, 2015, at 2:17 PM, Jeff Layton wrote: > > George, > > I changed my configure command to be: > > ./configure CCASFLAGS=-march=native > > and I

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

George, I changed my configure command to be: ./configure CCASFLAGS=-march=native and I get an error while running configure: ... *** Assembler checking dependency style of gcc -std=gnu99... gcc3 checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B checking the name lister

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

As you are not cross-compiling I would expect gcc to use the right assembly by default. What is happening is you force the native mode (-march=native) ? George. On Fri, May 29, 2015 at 10:09 AM, Jeff Layton wrote: > On 05/29/2015 09:35 AM, Jeff Layton wrote: > > Gilles, >

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

On 05/29/2015 09:35 AM, Jeff Layton wrote: Gilles, oops - yes, CFLAGS. But I also saw this posting: https://www.open-mpi.org/community/lists/users/2013/01/2.php where CCASFLAGS is used (I assume because for asm). I'm trying this flag when I configure Open MPI. I tried using the

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Gilles, oops - yes, CFLAGS. But I also saw this posting: https://www.open-mpi.org/community/lists/users/2013/01/2.php where CCASFLAGS is used (I assume because for asm). I'm trying this flag when I configure Open MPI. Thanks! Jeff Jeff, shall I assume you made a typo and wrote

Re: [OMPI users] Building OpenMPI on Raspberry Pi 2

Jeff, shall I assume you made a typo and wrote CCFLAGS instead of CFLAGS ? also, can you double check the flags are correctly passed to the assembler with cd opal/asm make -n atomic-asm.lo Cheers, Gilles On Friday, May 29, 2015, Jeff Layton wrote: > Good morning, > > I'm

[OMPI users] Building OpenMPI on Raspberry Pi 2

Good morning, I'm building OpenMPI from source on a Raspberry Pi 2 and I've hit an error. The error is: make[2]: Entering directory '/work/pi/src/openmpi-1.8.5/opal/asm' CPPASatomic-asm.lo atomic-asm.S: Assembler messages: atomic-asm.S:7: Error: selected processor does not support ARM