#3032: would be nice if -fno-code and --make worked together
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Reporter: duncan | Owner:
Type: feature request | Status: new
Priority: normal | Component: Compiler
Version: 6.8.2 | Severity: normal
Keywords: | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
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We had a Cabal feature request to omit linking to make it quicker in the
use case that we just want to check that a package typechecks ok.
Omitting liking is good but we could save more time by omitting code
generation too. The `-fno-code` would seem to be what we want in this case
but it looks like it only works with batch mode and not `--make` mode.
What happens at the moment when one uses `-fno-code --make` is that ghc
cannot find the dependent modules, though it is not clear that it is
actually looking for `.hi` files in any particular location. This is with
6.8.2, I've not checked with 6.10 but I assume it is the same.
So if it looks like it would not be too hard to do, then letting `-fno-
code` work with `--make` would be occasionally useful. The expected result
would be to write out the `.hi` files for all the modules but not the
corresponding `.o` files. When combined with `-O0` we might hope it to be
a bit quicker than normal builds.
Of course it would not work in the case of template Haskell, but Cabal
would just avoid using `-fno-code` if the package uses TH.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3032>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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