Explain different solc options (#429)

* explain solc options

* Add reference in readme

* random linting issue

CONTRIBUTING.md

@@ -46,23 +46,21 @@ All contributions must follow the below standards. Maintainers will close out PR
 
 ## Setup
 
-Run `source .env` to set FOUNDRY_SOLC to the correct solc binary.
+For V4, an unreleased solc binary is used to add support for TLOAD and TSTORE. There are options for using this binary with forge:
 
-`forge build` to get contract artifacts and dependencies for forge
+### Using `just`
 
-If after running `source .env`, you continue to get the error `Function "tload" not found.` try running
+`just build` to get contract artifacts and dependencies for forge
 
-On MacOS:
-`forge build --use ./bin/solc-mac`
+`just test` to run forge tests and update snapshots
 
-On Linux:
-`forge build --use ./bin/solc-static-linux`
+### Using environment variables
 
-## Tests
+Run `source .env` to set `FOUNDRY_FUZZ_SEED` and `FOUNDRY_SOLC` environment variables. You can then use forge directly
 
-`forge snapshot` to update the forge gas snapshots. Note these must use a static fuzz seed, so please run `source .env`, use `FOUNDRY_FUZZ_SEED=0x4444`, or use `just snapshots` when running forge snapshots.
+`forge build` to get contract artifacts and dependencies for forge
 
-`forge test` to run forge tests
+`forge test` to run forge tests and update snapshots
 
 ## Code of Conduct
 

README.md

@@ -9,7 +9,7 @@ The contracts in this repo are in early stages - we are releasing the draft code
 
 ## Contributing
 
-If you’re interested in contributing please see our [contribution guidelines](./CONTRIBUTING.md)!
+If you’re interested in contributing please see our [contribution guidelines](./CONTRIBUTING.md)! This includes instructions on how to compile using `TSTORE` and `TLOAD` opcodes in the `Setup` section.
 
 ## Whitepaper