---
syntax: markdown
tags: [tldr, common]
source: https://github.com/tldr-pages/tldr.git
---
# ghc

> The Glasgow Haskell Compiler.
> Compiles and links Haskell source files.
> More information: <https://downloads.haskell.org/ghc/latest/docs/users_guide/usage.html>.

- Find and compile all modules in the current directory:

`ghc Main`

- Compile a single file:

`ghc {{path/to/file.hs}}`

- Compile using extra optimization:

`ghc -O {{path/to/file.hs}}`

- Stop compilation after generating object files (.o):

`ghc -c {{path/to/file.hs}}`

- Start a REPL (interactive shell):

`ghci`

- Evaluate a single expression:

`ghc -e {{expression}}`
