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How can I get GHC Core output via stack?

Tags:

haskell

ghc

haskell-stack

stackage

How do I get a stack build command to dump the GHC Core? I've tried this, to no avail:

stack build :hello_world --ghc-options '-ddump-simpl'
like image 625
dbanas Avatar asked Jan 09 '18 01:01

dbanas

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Where does stack install GHC?

You can find these sandboxed GHC installations in the ghc-* directories in the stack path --programs directory. If you would like Stack to use your system GHC installation, use the --system-ghc flag or run stack config set system-ghc --global true to make Stack check your PATH for a suitable GHC by default.

How does Stack-work in Haskell?

stack-work directories local to each project. The Stack root directory holds packages belonging to snapshots and any Stack-installed versions of GHC. Stack will not tamper with any system version of GHC or interfere with packages installed by other build tools (such as Cabal (the tool)).

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stack build --skip <component> skips building the specified components of a local package. It allows you to skip test suites and benchmark without specifying other components (e.g. stack test --skip long-test-suite will run the tests without the long-test-suite test suite).

Where does stack install packages?

Stack installs the Stackage libraries in ~/. stack and any project libraries or extra dependencies in a . stack-work directory within each project's directory.

1 Answers

Make sure to clean before, or force recompilation via the stack option --force-dirty and ghc option -fforce-recomp.

The files are dumped somewhere around .stack-work/dist/.../build/hello_world/hello_world-tmp/.

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Li-yao Xia Avatar answered Oct 19 '22 02:10

Li-yao Xia
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