Hi Gilles,

as for that, recompiling OpenMPI works, but causes no change here.

-Tobias

-- 
Dr.-Ing. Tobias Hilbrich
Research Assistant

Technische Universitaet Dresden, Germany
Tel.: +49 (351) 463-38485
E-Mail: tobias.hilbr...@tu-dresden.de

> On 20 Oct 2015, at 11:42, Gilles Gouaillardet <gilles.gouaillar...@gmail.com> 
> wrote:
> 
> Tobias,
> 
> Btw, did you recompile ompi with this xcode ?
> Iirc, we do similar comparisons in ompi itself
> 
> Cheers,
> 
> Gilles
> 
> Tobias Hilbrich <tobias.hilbr...@tu-dresden.de> wrote:
>> Hi all,
>> 
>> a wonderful puzzle for the OSX folks in your team (Reproducer attached):
>> 
>> Attached source file builds with Xcode 7.0.0, but fails since the release of 
>> Xcode 7.0.1. I post it here since it results from an "if (MPI_COMM_NULL == 
>> MPI_COMM_SELF)". I am actually curious whether this is somehow off by 
>> itself, or whether it has something to do with how you define these 
>> constants. Overall, the situation is that this worked with previous clang 
>> compilers (and that it again works for more recent versions from mac-ports), 
>> so likely not your fault at all.
>> 
>> The issue I get is:
>> $ mpicc osx-10.10.5-xcode-7.0.1-openmpi-problem.c 
>> clang: error: unable to execute command: Segmentation fault: 11
>> clang: error: clang frontend command failed due to signal (use -v to see 
>> invocation)
>> Apple LLVM version 7.0.0 (clang-700.0.72)
>> Target: x86_64-apple-darwin14.5.0
>> Thread model: posix
>> clang: note: diagnostic msg: PLEASE submit a bug report to 
>> http://developer.apple.com/bugreporter/ and include the crash backtrace, 
>> preprocessed source, and associated run script.
>> clang: note: diagnostic msg: 
>> ********************
>> PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
>> ...
>> ********************
>> 
>> As I said above the culprit is "if (MPI_COMM_NULL == MPI_COMM_SELF)".
>> Also, this doesn't works either:
>> -  "if (MPI_COMM_SELF == MPI_COMM_NULL)"
>> But then, these work:
>> -  "if (MPI_COMM_SELF == MPI_COMM_WORLD)"
>> -  "if (MPI_COMM_WORLD == MPI_COMM_SELF)"
>> 
>> So it appears it has something to do with MPI_COMM_NULL specifically.
>> 
>> Maybe you already know of the issue. Maybe you can provide something to 
>> alleviate this issue in your releases, since it may take a while until we 
>> get a newer Xcode version on most OSX'es.
>> 
>> My "ompi_info" is at the bottom of the mail.
>> 
>> With that thanks for your looking into this, and many thanks for your 
>> wonderful MPI implementation,
>> -Tobias
>> 
>> $ ompi_info 
>>              Package: Open MPI saibot@Tobiass-MacBook-Pro.local
>>                       Distribution
>>             Open MPI: 1.8.4
>> Open MPI repo revision: v1.8.3-330-g0344f04
>> Open MPI release date: Dec 19, 2014
>>             Open RTE: 1.8.4
>> Open RTE repo revision: v1.8.3-330-g0344f04
>> Open RTE release date: Dec 19, 2014
>>                 OPAL: 1.8.4
>>   OPAL repo revision: v1.8.3-330-g0344f04
>>    OPAL release date: Dec 19, 2014
>>              MPI API: 3.0
>>         Ident string: 1.8.4
>>               Prefix: /Users/saibot/local/openmpi-1.8.4
>> Configured architecture: x86_64-apple-darwin14.0.0
>>       Configure host: Tobiass-MacBook-Pro.local
>>        Configured by: saibot
>>        Configured on: Sun Jan  4 09:27:07 CET 2015
>>       Configure host: Tobiass-MacBook-Pro.local
>>             Built by: saibot
>>             Built on: Sun Jan  4 09:33:26 CET 2015
>>           Built host: Tobiass-MacBook-Pro.local
>>           C bindings: yes
>>         C++ bindings: yes
>>          Fort mpif.h: no
>>         Fort use mpi: no
>>    Fort use mpi size: deprecated-ompi-info-value
>>     Fort use mpi_f08: no
>> Fort mpi_f08 compliance: The mpi_f08 module was not built
>> Fort mpi_f08 subarrays: no
>>        Java bindings: no
>> Wrapper compiler rpath: unnecessary
>>           C compiler: gcc
>>  C compiler absolute: /usr/bin/gcc
>> C compiler family name: GNU
>>   C compiler version: 4.2.1
>>         C++ compiler: g++
>> C++ compiler absolute: /usr/bin/g++
>>        Fort compiler: none
>>    Fort compiler abs: none
>>      Fort ignore TKR: no
>> Fort 08 assumed shape: no
>>   Fort optional args: no
>>       Fort INTERFACE: no
>> Fort ISO_FORTRAN_ENV: no
>>    Fort STORAGE_SIZE: no
>>   Fort BIND(C) (all): no
>>   Fort ISO_C_BINDING: no
>> Fort SUBROUTINE BIND(C): no
>>    Fort TYPE,BIND(C): no
>> Fort T,BIND(C,name="a"): no
>>         Fort PRIVATE: no
>>       Fort PROTECTED: no
>>        Fort ABSTRACT: no
>>    Fort ASYNCHRONOUS: no
>>       Fort PROCEDURE: no
>>        Fort C_FUNLOC: no
>> Fort f08 using wrappers: no
>>      Fort MPI_SIZEOF: no
>>          C profiling: yes
>>        C++ profiling: yes
>> Fort mpif.h profiling: no
>> Fort use mpi profiling: no
>> Fort use mpi_f08 prof: no
>>       C++ exceptions: no
>>       Thread support: posix (MPI_THREAD_MULTIPLE: no, OPAL support: yes,
>>                       OMPI progress: no, ORTE progress: yes, Event lib:
>>                       yes)
>>        Sparse Groups: no
>> Internal debug support: no
>> MPI interface warnings: yes
>>  MPI parameter check: runtime
>> Memory profiling support: no
>> Memory debugging support: no
>>      libltdl support: yes
>> Heterogeneous support: no
>> mpirun default --prefix: no
>>      MPI I/O support: yes
>>    MPI_WTIME support: gettimeofday
>>  Symbol vis. support: yes
>> Host topology support: yes
>>       MPI extensions: 
>> FT Checkpoint support: no (checkpoint thread: no)
>> C/R Enabled Debugging: no
>>  VampirTrace support: yes
>> MPI_MAX_PROCESSOR_NAME: 256
>> MPI_MAX_ERROR_STRING: 256
>>  MPI_MAX_OBJECT_NAME: 64
>>     MPI_MAX_INFO_KEY: 36
>>     MPI_MAX_INFO_VAL: 256
>>    MPI_MAX_PORT_NAME: 1024
>> MPI_MAX_DATAREP_STRING: 128
>>        MCA backtrace: execinfo (MCA v2.0, API v2.0, Component v1.8.4)
>>         MCA compress: bzip (MCA v2.0, API v2.0, Component v1.8.4)
>>         MCA compress: gzip (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA crs: none (MCA v2.0, API v2.0, Component v1.8.4)
>>               MCA db: hash (MCA v2.0, API v1.0, Component v1.8.4)
>>               MCA db: print (MCA v2.0, API v1.0, Component v1.8.4)
>>            MCA event: libevent2021 (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA hwloc: hwloc191 (MCA v2.0, API v2.0, Component v1.8.4)
>>               MCA if: bsdx_ipv6 (MCA v2.0, API v2.0, Component v1.8.4)
>>               MCA if: posix_ipv4 (MCA v2.0, API v2.0, Component v1.8.4)
>>      MCA installdirs: env (MCA v2.0, API v2.0, Component v1.8.4)
>>      MCA installdirs: config (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA pstat: test (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA sec: basic (MCA v2.0, API v1.0, Component v1.8.4)
>>            MCA shmem: mmap (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA shmem: posix (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA shmem: sysv (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA timer: darwin (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA dfs: app (MCA v2.0, API v1.0, Component v1.8.4)
>>              MCA dfs: orted (MCA v2.0, API v1.0, Component v1.8.4)
>>              MCA dfs: test (MCA v2.0, API v1.0, Component v1.8.4)
>>           MCA errmgr: default_app (MCA v2.0, API v3.0, Component v1.8.4)
>>           MCA errmgr: default_hnp (MCA v2.0, API v3.0, Component v1.8.4)
>>           MCA errmgr: default_orted (MCA v2.0, API v3.0, Component
>>                       v1.8.4)
>>           MCA errmgr: default_tool (MCA v2.0, API v3.0, Component v1.8.4)
>>              MCA ess: env (MCA v2.0, API v3.0, Component v1.8.4)
>>              MCA ess: hnp (MCA v2.0, API v3.0, Component v1.8.4)
>>              MCA ess: singleton (MCA v2.0, API v3.0, Component v1.8.4)
>>              MCA ess: slurm (MCA v2.0, API v3.0, Component v1.8.4)
>>              MCA ess: tool (MCA v2.0, API v3.0, Component v1.8.4)
>>            MCA filem: raw (MCA v2.0, API v2.0, Component v1.8.4)
>>          MCA grpcomm: bad (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA iof: hnp (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA iof: mr_hnp (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA iof: mr_orted (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA iof: orted (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA iof: tool (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA odls: default (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA oob: tcp (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA plm: isolated (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA plm: rsh (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA plm: slurm (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA ras: simulator (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA ras: slurm (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA rmaps: lama (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA rmaps: mindist (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA rmaps: ppr (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA rmaps: rank_file (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA rmaps: resilient (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA rmaps: round_robin (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA rmaps: seq (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA rmaps: staged (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA rml: oob (MCA v2.0, API v2.0, Component v1.8.4)
>>           MCA routed: binomial (MCA v2.0, API v2.0, Component v1.8.4)
>>           MCA routed: debruijn (MCA v2.0, API v2.0, Component v1.8.4)
>>           MCA routed: direct (MCA v2.0, API v2.0, Component v1.8.4)
>>           MCA routed: radix (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA state: app (MCA v2.0, API v1.0, Component v1.8.4)
>>            MCA state: hnp (MCA v2.0, API v1.0, Component v1.8.4)
>>            MCA state: novm (MCA v2.0, API v1.0, Component v1.8.4)
>>            MCA state: orted (MCA v2.0, API v1.0, Component v1.8.4)
>>            MCA state: staged_hnp (MCA v2.0, API v1.0, Component v1.8.4)
>>            MCA state: staged_orted (MCA v2.0, API v1.0, Component v1.8.4)
>>            MCA state: tool (MCA v2.0, API v1.0, Component v1.8.4)
>>        MCA allocator: basic (MCA v2.0, API v2.0, Component v1.8.4)
>>        MCA allocator: bucket (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA bcol: basesmuma (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA bcol: ptpcoll (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA bml: r2 (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA btl: self (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA btl: sm (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA btl: tcp (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA btl: vader (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA coll: basic (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA coll: hierarch (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA coll: inter (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA coll: libnbc (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA coll: ml (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA coll: self (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA coll: sm (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA coll: tuned (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA dpm: orte (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA fbtl: posix (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA fcoll: dynamic (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA fcoll: individual (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA fcoll: static (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA fcoll: two_phase (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA fcoll: ylib (MCA v2.0, API v2.0, Component v1.8.4)
>>               MCA fs: ufs (MCA v2.0, API v2.0, Component v1.8.4)
>>               MCA io: ompio (MCA v2.0, API v2.0, Component v1.8.4)
>>               MCA io: romio (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA mpool: grdma (MCA v2.0, API v2.0, Component v1.8.4)
>>            MCA mpool: sm (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA osc: rdma (MCA v2.0, API v3.0, Component v1.8.4)
>>              MCA osc: sm (MCA v2.0, API v3.0, Component v1.8.4)
>>              MCA pml: v (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA pml: bfo (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA pml: cm (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA pml: ob1 (MCA v2.0, API v2.0, Component v1.8.4)
>>           MCA pubsub: orte (MCA v2.0, API v2.0, Component v1.8.4)
>>           MCA rcache: vma (MCA v2.0, API v2.0, Component v1.8.4)
>>              MCA rte: orte (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA sbgp: basesmsocket (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA sbgp: basesmuma (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA sbgp: p2p (MCA v2.0, API v2.0, Component v1.8.4)
>>         MCA sharedfp: individual (MCA v2.0, API v2.0, Component v1.8.4)
>>         MCA sharedfp: lockedfile (MCA v2.0, API v2.0, Component v1.8.4)
>>         MCA sharedfp: sm (MCA v2.0, API v2.0, Component v1.8.4)
>>             MCA topo: basic (MCA v2.0, API v2.1, Component v1.8.4)
>>        MCA vprotocol: pessimist (MCA v2.0, API v2.0, Component v1.8.4)
>> 
>> 
>> 
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