> ## Documentation Index
> Fetch the complete documentation index at: https://mega-cli.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# compile

> Compile Solidity contracts using Foundry

# mega compile

The `compile` command (also aliased as `mega build`) compiles Solidity contracts using Foundry's Forge under the hood.

## Usage

```bash theme={null}
mega compile [options]
```

## Options

Mega CLI passes all options directly to Forge. Here are some commonly used options:

| Option       | Description                            |
| ------------ | -------------------------------------- |
| `--names`    | Print compiled contract names          |
| `--sizes`    | Print compiled non-test contract sizes |
| `--force`    | Clear the cache and recompile          |
| `--optimize` | Activate the Solidity optimizer        |
| `--watch`    | Watch for changes and recompile        |

<Note>
  The `mega compile` command supports all options available in `forge build`.
  See the [Forge documentation](https://book.getfoundry.sh/reference/forge/forge-build) for a complete list.
</Note>

## Description

This command compiles your Solidity contracts using Foundry's Forge compiler. It's a wrapper around `forge build` that ensures compatibility with the Mega CLI workflow while providing access to all of Forge's powerful compilation options.

## Examples

### Basic compilation

```bash theme={null}
mega compile
```

### Optimize contracts and show sizes

```bash theme={null}
mega compile --optimize --sizes
```

### Watch for changes and recompile automatically

```bash theme={null}
mega compile --watch
```

### Force recompilation by clearing the cache

```bash theme={null}
mega compile --force
```

## Related

* [deploy](/commands/deploy) - Deploy compiled contracts
* [setup](/commands/setup) - Ensure Foundry is properly installed