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 <mailto: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
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