RE: Question about packages and GHCi
On 02 February 2005 01:52, Martin Erwig wrote:
I apologize if this is the wrong mailing list to turn to, but I would be grateful for any help with two problems I have when trying to add a package to GHCi. (I wasn't able to find sufficient information in the documentation for packages
http://www.haskell.org/ghc/docs/latest/html/users_guide/packages.html.)
(1) When I try to add a package to ghc, I receive the error message that a GHCi lib fil cannot be found.
ghc-pkg -u -i fgl.pkg Reading package info from "fgl.pkg"done. Expanding embedded variables... done. warning: can't find GHCi lib `HSfgl.o' Saving old package config file... done. Writing new package config file... done.
The missing file `HSfgl.o' is located on the current directory as well as in the directory where all other .o and .a files for GHC are kept (/usr/local/lib/ghc-6.2/).
ghc-pkg is looking in the directories specified in the library_dirs field in fgl.pkg. HSfgl.o should be in one of those directories.
(2) Maybe related to the previous problem is the following. When I start "ghci -package fgl", I receive the following error message:
Loading package base ... linking ... done. Loading package haskell98 ... linking ... done. Loading package haskell-src ... linking ... done. Loading package fgl ...
GHCi runtime linker: fatal error: I found a duplicate definition for symbol __module_registered whilst processing object file /usr/local/lib/ghc-6.2/HSfgl.o This could be caused by: * Loading two different object files which export the same symbol * Specifying the same object file twice on the GHCi command line * An incorrect `package.conf' entry, causing some object to be loaded twice. GHCi cannot safely continue in this situation. Exiting now. Sorry.
I vaguely remembered seeing this before... googling for 'duplicate __module_registered' turned up this: http://www.haskell.org/pipermail/glasgow-haskell-users/2003-December/006 042.html which indicates that perhaps you should add -x to ld when building HSfgl.o? What version of GHC is this, BTW? Cheers, Simon
simonmar:
On 02 February 2005 01:52, Martin Erwig wrote:
I apologize if this is the wrong mailing list to turn to, but I would be grateful for any help with two problems I have when trying to add a package to GHCi. (I wasn't able to find sufficient information in the documentation for packages
http://www.haskell.org/ghc/docs/latest/html/users_guide/packages.html.)
(1) When I try to add a package to ghc, I receive the error message that a GHCi lib fil cannot be found.
ghc-pkg -u -i fgl.pkg Reading package info from "fgl.pkg"done. Expanding embedded variables... done. warning: can't find GHCi lib `HSfgl.o' Saving old package config file... done. Writing new package config file... done.
The missing file `HSfgl.o' is located on the current directory as well as in the directory where all other .o and .a files for GHC are kept (/usr/local/lib/ghc-6.2/).
ghc-pkg is looking in the directories specified in the library_dirs field in fgl.pkg. HSfgl.o should be in one of those directories.
(2) Maybe related to the previous problem is the following. When I start "ghci -package fgl", I receive the following error message:
Loading package base ... linking ... done. Loading package haskell98 ... linking ... done. Loading package haskell-src ... linking ... done. Loading package fgl ...
GHCi runtime linker: fatal error: I found a duplicate definition for symbol __module_registered whilst processing object file /usr/local/lib/ghc-6.2/HSfgl.o This could be caused by: * Loading two different object files which export the same symbol * Specifying the same object file twice on the GHCi command line * An incorrect `package.conf' entry, causing some object to be loaded twice. GHCi cannot safely continue in this situation. Exiting now. Sorry.
I vaguely remembered seeing this before... googling for 'duplicate __module_registered' turned up this:
http://www.haskell.org/pipermail/glasgow-haskell-users/2003-December/006 042.html
which indicates that perhaps you should add -x to ld when building HSfgl.o?
Yep, ld -x is the thing. Had a similar problem when building my own libs recently. -- Don
"Simon Marlow"
(1) When I try to add a package to ghc, I receive the error message that a GHCi lib file cannot be found.
ghc-pkg -u -i fgl.pkg Reading package info from "fgl.pkg"done. Expanding embedded variables... done. warning: can't find GHCi lib `HSfgl.o' Saving old package config file... done. Writing new package config file... done.
The missing file `HSfgl.o' is located on the current directory as well as in the directory where all other .o and .a files for GHC are kept (/usr/local/lib/ghc-6.2/).
ghc-pkg is looking in the directories specified in the library_dirs field in fgl.pkg. HSfgl.o should be in one of those directories.
This has puzzled me for a long time as well. I /always/ get this warning message, even when the HSfoo.o file is in the correct place, as listed in library_dirs. Regards, Malcolm
participants (3)
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dons＠cse.unsw.edu.au -
Malcolm Wallace -
Simon Marlow