error: compiling pre-compiles with solc fails

[bajpai244]

When I am trying to compile the precompiles with solc, I am getting various errors, and I wanted to know is there something i am missing?

Here is what I am doing:

• cloning https://github.com/lambdaclass/zksync_era_precompiles
• cd precompiles
• solc --strict-assembly Modexp.yul

I get the following error:

Error: Cannot use builtin function name "number" as identifier name.
   --> Modexp.yul:370:34:
    |
370 |             function UIntBitSize(number) -> bitSize {
    |                                  ^^^^^^

Error: Expected keyword "data" or "object" or "}".
   --> Modexp.yul:370:34:
    |
370 |             function UIntBitSize(number) -> bitSize {

solc version: Version: 0.8.13+commit.abaa5c0e.Darwin.appleclang

[IAvecilla]

Hey @bajpai244! Towards the end of the README file, we've included some handy commands to get the precompiles up and running. To compile these precompiles, you'll need the zksolc compiler, a solc wrapper that compiles contracts compatible with zksync nodes.

If you're interested in running a local memory node with the precompile contracts, execute make setup followed by make run. However, if you only wish to compile contracts without initiating the local node for any reason, you can utilize another command, make build-precompiles.

Please note, there might be an issue when running the node, specifically #208. We're currently investigating this error related to some version problem.

[bajpai244]

Hello @IAvecilla , thanks for the response here.

I don't want to run these pre-compiles on zk-sync era vm, but on the EVM itself, and hence I need them to be compiled via solc, but as explained they are giving errors.

[IAvecilla]

Mmmh I see. These precompiles aren't designed explicitly to operate within the EVM itself. They use ZKSync opcodes through the 'verbatim' instruction. While it might be possible to ensure compatibility, it would require a few adjustments to achieve that.

[ilitteri]

Closing as it is not possible for compiling the precompiles using solely solc.