DOC: update README_SETUP

README_SETUP.md

@@ -8,7 +8,8 @@
 
 We use [cmake](https://cmake.org) as build tool.
 
-1. `mkdir build && cd build/`
+0. clone/update the subrepo `git submodule update --init proto`
+1. `mkdir build && cd build`
 2. `conan install .. -s "compiler.libcxx=libstdc++11"`
 3. `cmake -B . ..`
 4. `cmake --build .`
@@ -38,6 +39,7 @@ variable.
 We use [Visual Studio 2019](https://visualstudio.microsoft.com/de/vs/features/cplusplus/)
 as compiler. We use [cmake](https://cmake.org/download/) as build tool.
 
+0. clone/update the subrepo `git submodule update --init proto`
 1. `mkdir build`
 2. `cd build`
 3. `conan install .. -g visual_studio -s arch=x86_64 -s build_type=Release -s compiler.toolset=v142 -s compiler.version=16 -s compiler.runtime=MD  --build=missing --update`
@@ -46,6 +48,23 @@ as compiler. We use [cmake](https://cmake.org/download/) as build tool.
    and build the project. (You can open Tools/Command Line/Developer Command
    Prompt and execute `msbuild libcaosdb.sln /property:Configuration=Release`)
 
+### Creating a Local Conan Build ##
+
+Building and installing libcaosdb with Conan is just a single command:  
+`conan create . -s "compiler.libcxx=libstdc++11"`
+
+For MacOS, you probably should adjust the option as mentioned above.
+
+### Troubleshooting
+
+#### `conan install` Fails Due to Missing Prebuilts
+
+When `conan install` fails during the installation of the dependencies because
+a precompiled package is not available for your specific settings, try adding
+the `--build=missing` option: `conan install .. [ other options
+] --build=missing`. This should download and compile the sources of the
+dependencies.
+
 ## Unit Tests
 
 ### Build