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quantum_package/README.md
Thomas Applencourt 9bc888729e Fix #194
2017-05-09 21:46:34 -05:00

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![QP](https://raw.githubusercontent.com/LCPQ/quantum_package/master/data/qp.png)
[![Build Status](https://travis-ci.org/LCPQ/quantum_package.svg?branch=master)](https://travis-ci.org/LCPQ/quantum_package)
[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/LCPQ/quantum_package?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
Set of quantum chemistry programs and libraries.
(under GNU GENERAL PUBLIC LICENSE v2)
For more information, you can visit the [wiki of the project](http://github.com/LCPQ/quantum_package/wiki), or below for the installation instructions.
Demo
====
[![Full-CI energy of C2 in 2 minutes](https://i.vimeocdn.com/video/555047954_295x166.jpg)](https://vimeo.com/scemama/quantum_package_demo "Quantum Package Demo")
[![Frozen-core Full-CI energy of Ti](https://raw.githubusercontent.com/LCPQ/quantum_package/master/data/Titanium.png)](https://raw.githubusercontent.com/LCPQ/quantum_package/master/data/Titanium.png "Convergence of Ti in cc-pv{DTQ}Z")
# Installation
## Requirements
* Fortran compiler (`ifort` and `gfortran` are tested)
* Python >= 2.6
* GNU make
* Bash
* Blas/Lapack
* unzip
* g++ (For ninja)
## Standard installation
### 1) Configure
$ ./configure <config_file> (--production | --development)
For example you can type `./configure config/gfortran.cfg --production`
This command has two purposes :
- Download and install all the requirements.
Installing OCaml and the Core library may take some time (up to 20min on an old machine).
- Create the file which contains all the dependencies for the binaries.
It's not a Makefile, but a Ninja file (so don't type `make` is hopeless, type `ninja` instead)
####Compilation Flags (`<config_file>`)
`<config_file>` is the path to the file which contains all the compilation flags (optimization flags, Lapack libary, etc). There are two example configure files in ``$QP_ROOT/config`` : ``ifort.cfg`` and ``gfortran.cfg``. You can copy these files to create a new file adapted to your architecture.
#### What utilization of the code will you do?
* If you only want the binaries (for production workflow) use the flag
`--production`. It compiles faster.
* Else if you are a developer and you want to be able to compile specific modules use: `--development`. It will create the `build.ninja` in each module.
### 2) Load environment variables
source quantum_package.rc
This file contains all the environment variables needed by the quantum package both to compile and run. This should also be done before running calculations.
### Optional) Add some modules
```
Usage:
qp_module.py create -n <name> [<children_modules>...]
qp_module.py download -n <name> [<path_folder>...]
qp_module.py install <name>...
qp_module.py list (--installed | --available-local)
qp_module.py uninstall <name>
```
For exemple you can type :
`qp_module.py install Full_CI`
### 3) Compiling the Fortran
Just type `ninja` if you are in `$QP_ROOT` (or `ninja -f $QP_ROOT/build.ninja` elsewhere). The compilation will take approximately 3 min.
If you have set the `--developement` flag you can go in any module directory and run `ninja` to build only this particular module. You can type `ninja all` in a module to compile all the submodules.
### 4) Compiling the OCaml
make -C $QP_ROOT/ocaml
### 5) Testing if all is ok
cd tests ; ./run_tests.sh
# Note on EZFIO.cfg
##Format specification :
```
Required:
[<provider_name>] The name of the provider in irp.f90 and in the EZFIO lib
doc:<str> The plain text documentation
type:<str> A type supported by the OCaml.
type `ei_handler.py get_supported_type` for a list
interface:<str> The interface is a list of strings sepeared by "," which can contain :
- ezfio : to build the EZFIO API
- provider : to build the corresponding providers
- ocaml : to build the corresponding bindings in OCaml
Optional:
default: <str> The default value,
needed if 'ocaml' is in interface list.
! No list is allowed for now !
size: <str> The size information.
(by default is one)
Example : 1; =sum(ao_num); (ao_num,3)
WARNING : The module and the value are separed by a "." not a "_".
For example (determinants.n_det)
ezfio_name: <str> The name in the EZFIO API
(by default is <provider_name>)
ezfio_dir: <str> Will be the directory of EZFIO.
(by default is <module_lower>)
```
##Example of EZFIO.cfg:
```
[thresh_SCF]
doc: Threshold on the convergence of the Hartree Fock energy
type: Threshold
default: 1.e-10
interface: provider,ezfio,ocaml
size: 1
[energy]
type: Strictly_negative_float
doc: Calculated HF energy
interface: ezfio
```
#FAQ
### Error: ezfio_* is already defined.
#### Why ?
You have two or more ezfio configuration files for the same variable. Check files in `$QP_ROOT/install/EZFIO/config/`
#### Fix
- rm $QP_ROOT/install/EZFIO/config/*
- ninja
### Error: Seg Fault (139)
```
Segmentation fault (core dumped)
Program exited with code 139.
```
#### Why ?
It's caused when we call the DGEMM routine of LAPACK.
##### Fix
Set `ulimit -s unlimited`, before runing `qp_run`. It seems to fix the problem.