diff --git a/lib/netcdf/Makefile.lammps b/lib/netcdf/Makefile.lammps index feeea61a0f..040df73fd0 100644 --- a/lib/netcdf/Makefile.lammps +++ b/lib/netcdf/Makefile.lammps @@ -14,5 +14,6 @@ endif ifneq ($(shell which ncmpidump),) PNETCDF_PATH = ($shell which ncmpidump | sed -e 's,bin/ncmpidump,,') netcdf_SYSINC = -DLMP_HAS_PNETCDF -I$(PNETCDF_PATH)/include -netcdf_SYSLIB = -L$(PNETCDF_PATH)/lib -lpnetcdf +netcdf_SYSLIB = -lpnetcdf +netcdf_SYSPATH = -L$(PNETCDF_PATH)/lib endif diff --git a/lib/netcdf/README b/lib/netcdf/README new file mode 100644 index 0000000000..00db8df001 --- /dev/null +++ b/lib/netcdf/README @@ -0,0 +1,43 @@ +The Makefile.lammps file in this directory is used when building +LAMMPS with packages that make use of the NetCDF library or its +parallel version. The file has several settings needed to compile +and link LAMMPS with the NetCDF and parallel NetCDF support. +For any regular NetCDF installation, all required flags should be +autodetected. Please note that parallel NetCDF support is +beneficial only when you run on a machine with very many processors +like an IBM BlueGene or Cray. For most people regular NetCDF +support should be sufficient and not cause any performance +penalties. + +If you have problems compiling or linking, you may have to set +the flags manually. There are three makefile variables + +1) netcdf_SYSINC +This is for setting preprocessor options and include file paths. +Set -DLMP_HAS_NETCDF, if you have NetCDF installed. +Set -DLMP_HAS_PNETCDF, if you have parallel NetCDF installed. +You can have either or both defines set. If none of these are +set, LAMMPS will compile, but the NetCDF enabled functionality +will not be available. +In addition you may have to point to the folder with the include +with -I/path/to/netcdf/include + +Example for a Fedora 24 machine with serial NetCDF installed as +netcdf-devel-4.4.0-3.fc24.x86_64 RPM package: + +netcdf_SYSINC = -DLMP_HAS_NETCDF -I/usr/include -I/usr/include/hdf + +2) netcdf_SYSLIB +This is the setting for all required libraries that need to be linked to. + +Example for a Fedora 24 machine with serial NetCDF installed as +netcdf-devel-4.4.0-3.fc24.x86_64 RPM package: + +netcdf_SYSLIB = -lnetcdf + +3) netcdf_SYSPATH +This is the setting for the path of directories with the NetCDF libraries. +Typically, this will be of the form -L/path/to/netcdf/lib + +In the example from above, it can be left empty, because the Linux +distribution provided libraries are installed in a system library location.