Add support for builds on ubuntu

README.md

@@ -2,22 +2,34 @@
 NewTek NDI Python wrapper
 
 ## Setup
-### Windows and mac
+### Windows, mac, ubuntu
 Donwload and install NDI SDK.  
 https://ndi.tv/sdk/
 
 ### Arch Linux
 ```
-yay ndi-sdk
+yay -S ndi-sdk
 ```
 
-## Clone and build
+## Clone
 ```
 git clone https://github.com/buresu/ndi-python.git --recursive
+```
+
+## Build
+```
 cd /path/to/build
 cmake /path/to/project
 cmake --build /path/to/build --config Release
 ```
+
+For ubuntu you need to set the SDK directory in NDI_SDK_DIR.  
+And build as follows.  
+```
+cmake /path/to/project -DNDI_SDK_DIR=/path/to/ndisdk
+cmake --build /path/to/build --config Release
+```
+
 After build copy ndi-python binary and NDI binary to execute directory.  
 Enjoy!