edit:
kleenelan@kleenelan-Workstation:~/software/hdf5-1.8.10$ grep -rn LL::
tools/h5dump/h5dump_ddl.c:1344: /*LL:: attr_name = attr + j + 1;
tools/lib/h5tools_str.c:635:/*LL:: ctx->need_prefix = 0;*/
test/th5s.c:733: /*LL:: ret = H5Pset_alloc_time(plist_id, alloc_time);
install HDF5:
sudo apt-get update
sudo apt-get install build-essential
sudo apt-get build-dep hdf5
mkdir ~/Software
cd ~/Software
wget https://support.hdfgroup.org/ftp/HDF5/releases/hdf5-1.8/hdf5-1.8.10/src/hdf5-1.8.10.tar.gz
tar -xf hdf5-1.8.10.tar.gz
cd hdf5-1.8.10/
./configure
make -j9
sudo make install