Regarding "distro": This was happening, for instance, on OpenBSD and NetBSD (32-bit kernels on 64-bit h/w) when testing your PR1643. However, it sounds like Nathan knows how/where to fix this.
HOWEVER, that is not the only issue here. Why is master is picking the BUILTIN (__sync) atomics (as shown in the configure output quoted below), while v2.x (same system and same config args) uses a .s file: *** 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 (/usr/bin/nm -B) interface... BSD nm checking for fgrep... /usr/bin/grep -F checking if .proc/endp is needed... no checking directive for setting text section... .text checking directive for exporting symbols... .globl checking for objdump... objdump checking if .note.GNU-stack is needed... no checking suffix for labels... : checking prefix for global symbol labels... checking prefix for lsym labels... .L checking prefix for function in .type... @ checking if .size is needed... yes checking if .align directive takes logarithmic value... no checking if processor supports x86_64 16-byte compare-and-exchange... no checking if gcc -std=gnu99 supports GCC inline assembly... yes checking if gcc -std=gnu99 supports DEC inline assembly... no checking if gcc -std=gnu99 supports XLC inline assembly... no checking for assembly format... default-.text-.globl-:--.L-@-1-0-1-1-0 checking for assembly architecture... IA32 checking for builtin atomics... BUILTIN_NO checking for perl... perl checking for pre-built assembly file... yes (atomic-ia32-linux-nongas.s) checking for atomic assembly filename... atomic-ia32-linux-nongas.s -Paul On Mon, May 9, 2016 at 1:22 AM, Gilles Gouaillardet <gil...@rist.or.jp> wrote: > Paul, > > > on which distro are you running ? > > are you compiling on a 64 bit distro to generate a 32 bit library ? > > > it seems we are currently only testing a atomic on a long (32 bits on a 32 > bits arch) and > > then incorrectly assume it works also on 64 bits (!) > > > Cheers, > > > Gilles > > On 5/9/2016 3:59 PM, Paul Hargrove wrote: > > Perhaps this is already known. > Several builds I've tried recently from the ompi (not ompi-release) repo > are failing on 32-bit platforms with > ../../../opal/.libs/libopen-pal.so: undefined reference to > `__sync_add_and_fetch_8' > > This is impacting PRs that I am being asked to test (e.g. 1643). > > Note that I did *not* configure with --enable-builtin-atomics, yet > configure seems to show them being selected anyway: > > *** 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 (/usr/bin/nm -B) interface... BSD nm > checking for fgrep... /usr/bin/grep -F > checking for __sync builtin atomics... yes > checking for processor support of __sync builtin atomic compare-and-swap > on 128-bit values... no > checking for __sync builtin atomic compare-and-swap on 128-bit values with > -mcx16 flag... no > checking if .proc/endp is needed... no > checking directive for setting text section... .text > checking directive for exporting symbols... .globl > checking for objdump... objdump > checking if .note.GNU-stack is needed... no > checking suffix for labels... : > checking prefix for global symbol labels... > checking prefix for lsym labels... .L > checking prefix for function in .type... @ > checking if .size is needed... yes > checking if .align directive takes logarithmic value... no > checking if processor supports x86_64 16-byte compare-and-exchange... no > checking for assembly architecture... IA32 > checking for builtin atomics... BUILTIN_SYNC > checking for atomic assembly filename... none > > -Paul > > -- > Paul H. Hargrove <phhargr...@lbl.gov> > phhargr...@lbl.gov > Computer Languages & Systems Software (CLaSS) Group > Computer Science Department Tel: +1-510-495-2352 > Lawrence Berkeley National Laboratory Fax: +1-510-486-6900 > > > _______________________________________________ > devel mailing listde...@open-mpi.org > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2016/05/18941.php > > > > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2016/05/18942.php > -- Paul H. Hargrove phhargr...@lbl.gov Computer Languages & Systems Software (CLaSS) Group Computer Science Department Tel: +1-510-495-2352 Lawrence Berkeley National Laboratory Fax: +1-510-486-6900
