Commit 92941aab authored by Richard's avatar Richard
Browse files

Update ccio_overview.md - $HDF5_ROOT

parent a220c9de
......@@ -88,7 +88,7 @@ Now, assuming your environment is set up correctly (which is machine dependent)
```
cd $HDF5_ROOT/library/build/ccio
CC=cc CFLAGS='-O3 -D<MACHINE>' $HDF5_ROOT/gitrepos/hdf5/configure --enable-parallel --enable-build-mode=production --enable-symbols=yes --prefix=$HDF5ROOT/library/install/ccio
CC=cc CFLAGS='-O3 -D<MACHINE>' $HDF5_ROOT/gitrepos/hdf5/configure --enable-parallel --enable-build-mode=production --enable-symbols=yes --prefix=$$HDF5_ROOT/library/install/ccio
```
Note that this configuration command calls for a machine-specific `-D<MACHINE>` flag. This flag is required if you want to enable a **machine-specific topology API** within the CCIO VFD. Currently, the only machine flags that can be utilized by the VFD are `-DTHETA` and `-DBGQ`. However, other machine topologies (and definition flags) can be added to the `src/HDF5mpio_topology.h` source file by following the steps outlined in the **"Contributing a New Machine Topology"** section below.
......
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