Here's a hopefully-comprehensible diff for what I changed: --- REPOSITORY/mpich/src/mpi/comm/comm_agree.c 2015-08-24 16:09:33.000000000 -0400 +++ SANDBOX/mpich/src/mpi/comm/comm_agree.c 2015-08-24 16:09:33.000000000 -0400 @@ -25,7 +25,6 @@ #ifndef MPICH_MPI_FROM_PMPI #undef MPIX_Comm_agree #define MPIX_Comm_agree PMPIX_Comm_agree -#endif #undef FUNCNAME #define FUNCNAME MPIR_Comm_agree @@ -106,6 +105,8 @@ goto fn_exit; } +#endif /* !defined(MPICH_MPI_FROM_PMPI) */ + #undef FUNCNAME #define FUNCNAME MPIX_Comm_agree #undef FCNAME --- REPOSITORY/mpich/src/mpi/comm/comm_shrink.c 2015-08-24 16:09:33.000000000 -0400 +++ SANDBOX/mpich/src/mpi/comm/comm_shrink.c 2015-08-24 16:09:33.000000000 -0400 @@ -39,7 +39,6 @@ #ifndef MPICH_MPI_FROM_PMPI #undef MPIX_Comm_shrink #define MPIX_Comm_shrink PMPIX_Comm_shrink -#endif #undef FUNCNAME #define FUNCNAME MPIR_Comm_shrink @@ -93,6 +92,8 @@ goto fn_exit; } +#endif /* !defined(MPICH_MPI_FROM_PMPI) */ + #undef FUNCNAME #define FUNCNAME MPIX_Comm_shrink #undef FCNAME --- REPOSITORY/mpich/src/glue/romio/all_romio_symbols.c 2015-08-24 16:09:33.000000000 -0400 +++ SANDBOX/mpich/src/glue/romio/all_romio_symbols.c 2015-08-24 16:09:33.000000000 -0400 @@ -36,6 +36,9 @@ #include "mpi.h" void MPIR_All_romio_symbols(void); + +#ifndef MPICH_MPI_FROM_PMPI + void MPIR_All_romio_symbols(void) { #ifdef MPI_MODE_RDONLY @@ -525,3 +528,4 @@ } #endif /* MPI_MODE_RDONLY */ } +#endif /* !defined(MPICH_MPI_FROM_PMPI) */ Note that the problem doesn't show up when building MPICH in any normal manner - what I'm doing is unpacking the static libraries libmpi.a and libpmpi.a on Mac and re-packaging all the object files into a single .dylib file - and that fails because of the duplicate symbols. Cheers, Edric. -----Original Message----- Message: 5 Date: Thu, 28 Jul 2016 10:48:23 -0500 From: Kenneth Raffenetti <[email protected]> To: <[email protected]> Subject: Re: [mpich-discuss] Minor compilation problem with 3 mpich source files Message-ID: <[email protected]> Content-Type: text/plain; charset="utf-8"; format=flowed Thanks, I believe I've seen this issue before but our nightly builds don't currently show any errors. Might be specific to a compiler/linker version. Do you have a patch you could share to show your fix? If not, I will try to reimplement the solution. Ken On 07/28/2016 09:36 AM, Edric Ellis wrote:

Hi there,

I found three source files:

src/mpi/comm/comm_agree.c

src/mpi/comm/comm_shrink.c

src/glue/romio/all_romio_symbols.c

where the MPIR functions were ending up in both the ?mpi? and ?pmpi? object files (we need to repackage the libraries in a slightly odd way on Mac, and this was causing that to fail). I fixed this by moving (or adding) the ?#ifndef MPICH_MPI_FROM_PMPI? guards to ensure the MPIR symbols didn?t end up in the ?mpi? object files. This problem appears to still be present in the latest version 3.2 (I?m actually currently building 3.1.4).

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