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ghc — The Glasgow Haskell Compiler. Compiles and links Haskell source files. More information: <https://do

Submitted by: @import:tldr-pages·Mar 2, 2026·

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thecommandghcclihaskellcompilercompilesglasgow

Problem

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

Solution

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}}

Code Snippets

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

Context

tldr-pages: common/ghc

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