#3410: ghc fails to parse versioned GPL and LGPL license from package
configuration
-----------------------------+----------------------------------------------
Reporter: int-e | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 6.11 | Severity: normal
Keywords: | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
-----------------------------+----------------------------------------------
I used this shell script to reproduce the problem:
{{{
#! /bin/sh
DIR=$(mktemp -d); cd ${DIR}; trap "cd /; rm -r ${DIR}" EXIT
echo "[]" > P
ghc-pkg -f P register - > /dev/null <<EOF
name: dummy-gpl
license: GPL
EOF
ghc-pkg -f P register - > /dev/null <<EOF
name: dummy-lgpl
license: LGPL-3
EOF
ghc -package-conf P -e 'putStrLn "success"' || echo fail
}}}
which fails like this:
{{{
ghc-stage2: P:1:163: parse error on input `Nothing'
fail
}}}
It turns out that ghc-pkg uses Cabal's code to manipulate the package
configuration, while ghc comes with its own parser in {{{ParsePkgConf.y}}}
- possible reasons include: historic reasons, better error messages,
better performance.
See also this recent thread: http://www.haskell.org/pipermail/glasgow-
haskell-users/2009-July/017600.html
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3410>
GHC <http://www.haskell.org/ghc/>
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