Installation on Android.
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Marek Nečada
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@ -89,6 +89,9 @@ Special care might need to be taken when installing QPMS in cluster environments
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Specific installation instructions for Aalto University's Triton cluster
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can be found in a [separate document][TRITON-README].
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Instructions for installation on Android-based devices are
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in [another document][INSTALL-ANDROID].
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Documentation
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=============
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@ -172,6 +175,7 @@ in Telegram!
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[GSL]: https://www.gnu.org/software/gsl/
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[cmake]: https://cmake.org
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[TRITON-README]: README.Triton.md
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[INSTALL-ANDROID]: notes/INSTALL_ANDROID.md
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[tutorial-finite]: finite_systems.md
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[tutorial-infinite]: lattices.md
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[doxygen]: http://doxygen.nl/
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@ -0,0 +1,107 @@
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# Installing QPMS on Android/AOSP (-based) systems
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Yes, it is possible. Basically all you need is a device capable of running [Termux](https://termux.com/) with enough memory to build everything.
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The following instructions have been tested with Termux version 0.118.0 on
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[e/OS/ R development build on a Samsung Galaxy S10e](https://doc.e.foundation/devices/beyond0lte/install)
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([e-1.0-r-20220526188878-dev-beyond0lte](https://images.ecloud.global/dev/beyond0lte/)).
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Presumably, they should work also on stock Android as well, but who
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in their right mind would run all the spyware by Google & al.?
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Physical keyboard or [remote access](https://wiki.termux.com/wiki/Remote_Access) is strongly recommended. :D
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## Get Termux
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Just [install the Termux app from F-Droid or Github as per instructions](https://github.com/termux/termux-app#f-droid).
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Open Termux; the following steps of these instructions are basically
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just commands you need to type in Termux.
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## Install prerequisities from termux repositories
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```
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pkg install python3 cmake git clang build-essential binutils
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```
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## Build and install GSL
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```
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curl -O https://www.nic.funet.fi/pub/gnu/ftp.gnu.org/pub/gnu/gsl/gsl-latest.tar.gz
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tar xf gsl-latest.tar.gz
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cd gsl-2.7.1
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./configure --prefix=$PREFIX
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make # add -j4 or so to make it faster on multicore systems
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make install
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cd -
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```
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## Build and install OpenBLAS
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```
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git clone https://github.com/xianyi/OpenBLAS.git
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cd OpenBLAS
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make
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make PREFIX=$PREFIX install
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cd -
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```
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### Workaround for "broken" setup.py script
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The goal is to fix `setup.py` so that it finds the correct libraries automatically, but in the meantime, you can use this workaround to get the Python part of QPMS installed:
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```
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ln -s $PREFIX/lib/libopenblas.so $PREFIX/LIB/liblapacke.so
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```
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## Build and install Numpy
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(Successful build requires the `MATHLIB` environmental variable set, otherwise linking will fail; see https://wiki.termux.com/wiki/Python.)
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```
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MATHLIB=m pip3 install numpy
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```
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### Install Sympy
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```
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pip3 install sympy
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```
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## Build and install QPMS
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```
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git clone https://repo.or.cz/qpms.git
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cd qpms
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cmake -DCMAKE_INSTALL_PREFIX=$PREFIX . # ugly, TODO make a separate build tree!
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make install
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python3 setup.py install
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```
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Hopefully, QPMS has installed successfully. At this point, you should be able
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to import and use QPMS with some exceptions. First, there is some legacy code
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in the `qpms.qpms_p` module (which is no longer imported automatically with
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bare `import qpms`). You shouldn't need this unless you are trying to run some
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historic Jupyter notebooks or other old custom scripts. It contains a scipy
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dependence, and scipy is hard to get working in Android environment (as
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it requires a Fortran compiler to build).
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## Install matplotlib
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If you try to run just `pip3 install matplotlib` in Termux, it might likely
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fail when installing the `pillow` dependency.
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First, according to [Termux wiki](https://wiki.termux.com/wiki/Python#Python_module_installation_tips_and_tricks),
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pillow depends on `libpng` and `libjpeg-turbo`, which are fortunately
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available in Termux packages.
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Second, pillow instalation requires an additional environment variable
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`LDFLAGS="-L/system/lib64"` to be set on 64-bit devices.
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Hence:
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```
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pkg install libpng libjpeg-turbo
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export LDFLAGS="-L/system/lib64" # on 64-bit devices
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pip3 install matplotlib
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```
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After this step, you should be able to run the command-line scripts
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from `misc/` directory and examples from `examples/` directory.
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