arm dependencies

CHANGELOG.md

@@ -67,7 +67,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix import Literal in plotters ([#558](https://github.com/tinkoff-ai/etna/pull/558))
 - 
 - Fix plot method bug when plot method does not plot all required segments ([#596](https://github.com/tinkoff-ai/etna/pull/596))
-- 
+- Fix dependencies for ARM ([#599](https://github.com/tinkoff-ai/etna/pull/599))
 - [BUG] nn models make forecast without inverse_transform ([#541](https://github.com/tinkoff-ai/etna/pull/541))
 
 ## [1.6.3] - 2022-02-14

docs/source/arm.rst

@@ -0,0 +1,17 @@
+Installation guide for Apple M1 (ARM)
+=====================================
+
+We are trying to make ETNA work with Apple M1 and other ARM chips.
+However due to novelty of these architectures some packages ETNA depends on are going to run into some problems or bugs.
+
+List of known problems:
+
+- `CatBoost installation problem <https://github.com/catboost/catboost/issues/1526#issuecomment-978223384>`_
+- `Numba (llvmlite) installation problem <https://github.com/numba/llvmlite/issues/693#issuecomment-909501195>`_
+
+Possible workaround:
+
+- Use python>=3.9 and initialize virtualenv.
+- Build CatBoost via instruction in the comment above: you will need llvm installed via brew and you should specify paths to llvm and python binaries in flags correctly to make successful build. 
+- Install builded CatBoost whl in virtualenv.
+- Install library: ``LLVM_CONFIG="/opt/homebrew/Cellar/llvm@11/11.1.0_3/bin/llvm-config" pip install etna==<version>``. (``LLVM_CONFIG`` flag may be optional and it could be different a little bit in version spec but you should have 11 or 12 major version)

docs/source/index.rst

@@ -17,6 +17,7 @@ Welcome to ETNA's documentation!
    loggers
    commands
    settings
+   arm
    api
 
 Indices and tables