Add HDF5 disk operations in doc

doc/doxygen/chapters/501_environment_variables.doxy

@@ -905,7 +905,8 @@ full.
 This specifies then backend to be used by StarPU to push data when the main
 memory is getting full. The default is unistd (i.e. using read/write functions),
 other values are stdio (i.e. using fread/fwrite), unistd_o_direct (i.e. using
-read/write with O_DIRECT), and leveldb (i.e. using a leveldb database).
+read/write with O_DIRECT), leveldb (i.e. using a leveldb database), and hdf5 
+(i.e. using HDF5 library).
 </dd>
 
 <dt>STARPU_DISK_SWAP_SIZE</dt>

doc/doxygen/chapters/510_configure_options.doxy

@@ -486,6 +486,20 @@ Specify the blas library to be used by some of the examples. Librairies availabl
 Enable linking with LevelDB if available
 </dd>
 
+<dt>--with-hdf5-include-dir=<path></dt>
+<dd>
+\anchor with-hdf5-include-dir
+\addindex __configure__--with-hdf5-include-dir
+Specify the directory where is stored the header hdf5.h.
+</dd>
+
+<dt>--with-hdf5-lib-dir=<path></dt>
+<dd>
+\anchor with-hdf5-lib-dir
+\addindex __configure__--with-hdf5-lib-dir
+Specify the directory where is stored the hdf5 library.
+</dd>
+
 <dt>--disable-starpufft</dt>
 <dd>
 \anchor disable-starpufft

doc/doxygen/chapters/api/data_out_of_core.doxy

@@ -132,4 +132,11 @@ This set uses the leveldb created by Google <br />
 More information at https://code.google.com/p/leveldb/ <br />
 It doesn't support asynchronous transfers.
 
+\var starpu_disk_hdf5_ops
+\ingroup API_Out_Of_Core
+This set uses the HDF5 library.<br />
+<strong>It doesn't support multiple opening from different processes. </strong> <br />
+You may only allow one process to write in the HDF5 file. <br />
+<strong>If HDF5 library is not compiled with --thread-safe you can't open more than one HDF5 file at the same time. </strong>
+
 */