Mention submodule in README

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Marek Nečada 2020-06-23 15:30:21 +03:00
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@ -52,7 +52,16 @@ you can [get the source and compile it yourself][GSL].
You also need a fresh enough version of [cmake][].
After GSL is installed, you can install qpms to your local python library using
QPMS uses a C version of the Amos library for calculating Bessel function
from a submodule. Before proceeding with running `cmake`, the submodules
need to be downloaded first (in the QPMS source root directory):
```{.sh}
git submodule init
git submodule update
```
After GSL is installed and submodules updated, you can install qpms to your local python library using
```{.sh}
cmake -DCMAKE_INSTALL_PREFIX=${YOUR_PREFIX} .