Problem with download “Standard Peripheral Library”
fuck off - the solution is here:
Question: Why does the IDE freeze when accessing to the build settings (Properties > C/C++ Build > Setting) on Linux ?
Answer
This is a known troubleshooting Eclipse bug with the graphical library on Linux distribution (Ubuntu, Mint...).
Eclipse is running with GTK3 by default. To force, Eclipse to use the older GTK2 version, you need to set the environment variable SWT_GTK3=0 before running Eclipse.