Created How to build M1 (markdown)

How-to-build-M1.md

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+Originally posted by @celogeek in https://github.com/darodi/kcc/issues/4#issuecomment-1364553511
+
+I figure out a way to build it on M1.
+Here the result: https://static.celogeek.com/KCC/M1/KindleComicConverter_osx_5.5.3b17.dmg
+
+So to do that:
+I use pyenv.
+
+So for the repo
+```
+pyenv install 3.9.16
+pyenv virtualenv 3.9.16  kindle
+pyenv activate kindle
+
+brew install pyqt@5 boost-python3 cmake
+export PYTHONPATH=/opt/homebrew/Cellar/pyqt@5/5.15.7_1/lib/python3.9/site-packages
+pip install -r requirements.txt
+```
+
+You need a m1 compatible version of 7z:
+```
+git clone https://github.com/p7zip-project/p7zip.git
+cd p7zip
+git checkout v17.04
+make -j4 7z
+```
+
+In the bin directory, you will have
+```
+bin
+├── 7z
+├── 7z.so
+├── 7za
+└── Codecs
+    └── Rar.so
+```
+
+Copy and replace those files into other/osx
+```
+git status
+	modified:   other/osx/7z
+	modified:   other/osx/7z.so
+	modified:   other/osx/Rar.so
+```
+
+```
+rm -rf dist
+python setup.py build_binary
+```
+
+You should have in the dist directory the DMG that should works.
+
+To update I think until we have a solution:
+```
+git stash
+git pull
+git stash pop
+rm -rf dist
+python setup.py build_binary
+```
+
+Let me know if it works for you.