argotorg/solidity ? reverse-engineered prompt

Build me the Solidity compiler from this repo so I can write and test smart contracts locally.

I want a clean setup that follows the project docs, can be built from source, and gives me a working solc binary I can run on a simple example contract. Please make sure the build works on a normal development machine, include any steps needed to install dependencies, and point out anything I need to know if the latest docs have changed.

After that, help me verify it by compiling the sample Hello World contract from the README, and if possible, run the relevant tests so I know everything is working. If there are any build errors or missing pieces, fix them and keep iterating until the compiler is usable.