Is it possible to add custom toolchain to ST Visual Develop? I want to add SDCC compiler.

I am trying to download limited version from Cosmic. But i think their download page not working anymore. 

I just installed STM32CubeIDE 1.0 version to give it a try. When I tried to enable SWV , i saw it is disabled and can not modifiable. At first, I assumed this is because of some limitation of chip, but with same hardware my other compiler ( Keil ) i...