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Trying the same on a completely
different machine (7.4.2) just works, so it appears to be an
account/machine/version problem. I didn't see anything on the
release notes for 7.4.2 that looks relevant, so I'll be guessing
an account/machine issue.
How can GHC be reporting that CSE.Pass imports CSE.Plugin when it
doesn't?
What are the account specific variables that might cause
CSE/Plugin.hs:6:8:
Could not find module `GhcPlugins'
It is a member of the hidden package `ghc-7.4.1'.
Use -v to see a list of the files searched for.
to appear? (since that appears to be the first deviation from
normal behavior)
I know of the --user package database, I'll try to clear that and
retry.
Daniel
On 11/20/2012 06:58 PM, Daniel Vainsencher wrote:
Hi everyone. Trying to write a GHC plugin according to
[1], but setup is failing on what seems a standard example [2].
[1] http://hackage.haskell.org/trac/ghc/wiki/NewPlugins
[2] https://github.com/thoughtpolice/cse-ghc-plugin
Using GHC 7.4.1...
0 $ cabal install cse-ghc-plugin --reinstall
Resolving dependencies...
In order, the following will be installed:
cse-ghc-plugin-0.1.1 (reinstall)
Warning: Note that reinstalls are always dangerous. Continuing
anyway...
Downloading cse-ghc-plugin-0.1.1...
Configuring cse-ghc-plugin-0.1.1...
Building cse-ghc-plugin-0.1.1...
Preprocessing library cse-ghc-plugin-0.1.1...
[1 of 2] Compiling CSE.Pass ( CSE/Pass.lhs,
dist/build/CSE/Pass.o )
[2 of 2] Compiling CSE.Plugin ( CSE/Plugin.hs,
dist/build/CSE/Plugin.o )
Registering cse-ghc-plugin-0.1.1...
Installing library in
/home/t-davain/.cabal/lib/cse-ghc-plugin-0.1.1/ghc-7.4.1
Registering cse-ghc-plugin-0.1.1...
0 $ ghc -fplugin=CSE.Plugin Test.hs
CSE/Plugin.hs:6:8:
Could not find module `GhcPlugins'
It is a member of the hidden package `ghc-7.4.1'.
Use -v to see a list of the files searched for.
0 $ ghc -package ghc -fplugin=CSE.Plugin Test.hs
Module imports form a cycle:
module `CSE.Pass' (./CSE/Pass.lhs)
imports `CSE.Plugin' (./CSE/Plugin.hs)
which imports `CSE.Pass' (./CSE/Pass.lhs)
0 $
I don't see that CSE.Pass imports CSE.Plugin anywhere...
I note that I needed to pass "-package ghc" to ghc, which the
guide [3] does not mention.
[3] http://www.haskell.org/ghc/docs/7.4.1/html/users_guide/compiler-plugins.html
The --reinstall is because I installed it from source first.
Ideas what is wrong?
--
Daniel Vainsencher
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