Jeff, can you gcc -march=armv7-a foo.c
Cheers, Gilles On Tuesday, June 9, 2015, Jeff Layton <layto...@att.net> 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 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 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 -I../../orte/include -I../../ompi/include >> -I../../oshmem/include >> -I../../opal/mca/hwloc/hwloc191/hwloc/include/private/autogen >> -I../../opal/mca/hwloc/hwloc191/hwloc/include/hwloc/autogen -I../.. >> -I/work/pi/src/openmpi-1.8.5/opal/mca/hwloc/hwloc191/hwloc/include >> -I/work/pi/src/openmpi-1.8.5/opal/mca/event/libevent2021/libevent >> -I/work/pi/src/openmpi-1.8.5/opal/mca/event/libevent2021/libevent/include >> -march=armv7 -MT atomic-asm.lo -MD -MP -MF .deps/atomic-asm.Tpo -c >> atomic-asm.S -fPIC -DPIC -o .libs/atomic-asm.o^M >> atomic-asm.S:1:0: error: target CPU does not support ARM mode >> >> which is very puzzling ... >> >> can you confirm >> 1) you are not cross compiling >> 2) your gcc can generate code for armv7 ? >> >> Cheers, >> >> Gilles >> >> >> >> >> On 6/9/2015 1:48 AM, Jeff Layton wrote: >> >>> 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 /work/pi/src/openmpi-1.8.5 $ make >>> Making all in config >>> make[1]: Entering directory '/work/pi/src/openmpi-1.8.5/config' >>> make[1]: Nothing to be done for 'all'. >>> make[1]: Leaving directory '/work/pi/src/openmpi-1.8.5/config' >>> Making all in contrib >>> make[1]: Entering directory '/work/pi/src/openmpi-1.8.5/contrib' >>> make[1]: Nothing to be done for 'all'. >>> make[1]: Leaving directory '/work/pi/src/openmpi-1.8.5/contrib' >>> Making all in opal >>> make[1]: Entering directory '/work/pi/src/openmpi-1.8.5/opal' >>> Making all in include >>> make[2]: Entering directory '/work/pi/src/openmpi-1.8.5/opal/include' >>> make all-am >>> make[3]: Entering directory '/work/pi/src/openmpi-1.8.5/opal/include' >>> make[3]: Leaving directory '/work/pi/src/openmpi-1.8.5/opal/include' >>> make[2]: Leaving directory '/work/pi/src/openmpi-1.8.5/opal/include' >>> Making all in asm >>> make[2]: Entering directory '/work/pi/src/openmpi-1.8.5/opal/asm' >>> CC asm.lo >>> rm -f atomic-asm.S >>> ln -s "../../opal/asm/generated/atomic-local.s" atomic-asm.S >>> CPPAS atomic-asm.lo >>> atomic-asm.S: Assembler messages: >>> atomic-asm.S:7: Error: selected processor does not support ARM mode `dmb' >>> atomic-asm.S:15: Error: selected processor does not support ARM mode >>> `dmb' >>> atomic-asm.S:23: Error: selected processor does not support ARM mode >>> `dmb' >>> atomic-asm.S:55: Error: selected processor does not support ARM mode >>> `dmb' >>> atomic-asm.S:70: Error: selected processor does not support ARM mode >>> `dmb' >>> atomic-asm.S:86: Error: selected processor does not support ARM mode >>> `ldrexd r4,r5,[r0]' >>> atomic-asm.S:91: Error: selected processor does not support ARM mode >>> `strexd r1,r6,r7,[r0]' >>> atomic-asm.S:107: Error: selected processor does not support ARM mode >>> `ldrexd r4,r5,[r0]' >>> atomic-asm.S:112: Error: selected processor does not support ARM mode >>> `strexd r1,r6,r7,[r0]' >>> atomic-asm.S:115: Error: selected processor does not support ARM mode >>> `dmb' >>> atomic-asm.S:130: Error: selected processor does not support ARM mode >>> `ldrexd r4,r5,[r0]' >>> atomic-asm.S:135: Error: selected processor does not support ARM mode >>> `dmb' >>> atomic-asm.S:136: Error: selected processor does not support ARM mode >>> `strexd r1,r6,r7,[r0]' >>> Makefile:1608: recipe for target 'atomic-asm.lo' failed >>> make[2]: *** [atomic-asm.lo] Error 1 >>> make[2]: Leaving directory '/work/pi/src/openmpi-1.8.5/opal/asm' >>> Makefile:2149: recipe for target 'all-recursive' failed >>> make[1]: *** [all-recursive] Error 1 >>> make[1]: Leaving directory '/work/pi/src/openmpi-1.8.5/opal' >>> Makefile:1698: recipe for target 'all-recursive' failed >>> make: *** [all-recursive] Error 1 >>> >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users >>> Link to this post: >>> http://www.open-mpi.org/community/lists/users/2015/06/27050.php >>> >>> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users >> Link to this post: >> http://www.open-mpi.org/community/lists/users/2015/06/27055.php >> >> > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/06/27058.php >
