Hi, > I want to use parallel-netcdf through the F90 API in NetCDF, so I try to > build NetCDF with '--enable-pnetcdf' option (in Mac). The packages of NetCDF > are: > > netcdf-126.96.36.199.tar.gz, netcdf-fortran-4.2.tar.gz > > But I encountered the following error when running my programs: > > dyld: lazy symbol binding failed: Symbol not found: _nf_create_par_ > Referenced from: /usr/local/lib/libnetcdff.5.dylib > Expected in: flat namespace > > So I checked the symbols in the library with '--enable-pnetcdf' switched on: > > $ nm /usr/local/lib/libnetcdff.dylib | grep nf_create > 552: U _nf_create_ > 553:00000000000021ad T _nf_create__ > 554: U _nf_create_par_ > 555:00000000000091ed T _nf_create_par__ > > and with '--enable-pnetcdf' switched off: > > $ nm /usr/local/lib/libnetcdff.dylib | grep nf_create > 544:0000000000001b8d T _nf_create_ > 545:0000000000008bcd T _nf_create_par_ > > What is the '_nf_create_par__' when building with parallel-netcdf? That just looks like a mismatch between how the Fortran-77 functions expect the corresponding C functions to be named (one trailing "_" character) and how they are actually named (two trailing "_" characters"). Perhaps the C library was compiled without the correct flag that determines this naming convention, such as -DpgiFortran or -DgFortran. Sorry, I'm unable to duplicate this problem. Building the netCDF Fortran library on MacOS requires that the Fortran compiler you use is compatible with the C compiler, and that the C library is built with correct flags to specify which conventions are used to call C functions from Fortran, as described in step 4 here, under the "Using Static Libraries" section: http://www.unidata.ucar.edu/netcdf/docs/netcdf-fortran-install.html I've sometimes been able to build the netCDF Fortran libraries with parallel support by using the macports.org package named "netcdf-fortran", as follows: $ sudo port install netcdf-fortran +mpich but that uses only HDF5 parallel I/O, and didn't work when I tried it recently. You might send your question to the parallel-netcdf support email to see if they can help. --Russ > Best regards, > > Li > > ----------------------------------------- > Dr. Li Dong (??) > LASG, Institute of Atmospheric Physics > Chinese Academy of Sciences > P.O. Box 9804 > Beijing 100029, China > Phone: 8610-8299 5143 > > > Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: WRU-143814 Department: Support netCDF Priority: Normal Status: Closed
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