Display compiler license somewhere (in an about window)

[axic]

Use solc.license() to retrieve the text - it will be very long though.

Depends on https://github.com/ethereum/solc-js/pull/121.

[LianaHus]

we can add this to plugin, for example an icon near "+" custom compiler icon

[cameel]

To summarize my answer from the chat

Do you think license depends on compiler version?

The license seems to always have been some form of GPL. As to specific version - currently it's GPLv3 but I'm seeing different versions in history so it might have been a different version back when Solidity was a part of cpp-ethereum.

But if you meant the output of the license() function of the emscripten binary - this can and does change, though not frequently. It happens when someone fixes a typo or includes sources of some dependency that has a different license. Take a look at the history of license.h.in - it's the file the license text is generated from.