[Haskell-cafe] readline does not work on gentoo amd64 (ghc-6.10.4)

[Sergei Trofimovich]

Hi, dear list! libraries at haskell.org treats me as a spammer, so
I'm writing here.

Today I've stuck with following problems:
1. After recent readline upgrade (5 -> 6) in my distro I got
unbuildable lambdabot. After investigating a little I've
noticed I'm having broken readline:

//===--------------------
$cabal install readline
...
$ ghci -package readline
GHCi, version 6.10.4: http://www.haskell.org/ghc/  :? for help
Loading package ghc-prim ... linking ... done.
Loading package integer ... linking ... done.
Loading package base ... linking ... done.
Loading package syb ... linking ... done.
Loading package base-3.0.3.1 ... linking ... done.
Loading package filepath-1.1.0.2 ... linking ... done.
Loading package old-locale-1.0.0.1 ... linking ... done.
Loading package old-time-1.0.0.2 ... linking ... done.
Loading package unix-2.3.2.0 ... linking ... done.
Loading package directory-1.0.0.3 ... linking ... done.
Loading package process-1.0.1.1 ... linking ... done.
Loading package readline-1.0.1.0 ... <command line>: can't load .so/.DLL for: readline (/usr/lib64/libreadline.so: invalid ELF header)
//===--------------------

It's true, there is no real ELF library, but none of packages
complained before.

//===--------------------
$ cat /usr/lib64/libreadline.so
/* GNU ld script
   Since Gentoo has critical dynamic libraries in /lib, and the static versions
   in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
   run into linking problems.  This "fake" dynamic lib is a linker script that
   redirects the linker to the real lib.  And yes, this works in the cross-
   compiling scenario as the sysroot-ed linker will prepend the real path.

   See bug http://bugs.gentoo.org/4411 for more info.
 */
OUTPUT_FORMAT ( elf64-x86-64 )
GROUP ( /lib64/libreadline.so.6 )
//===--------------------

Looks like readline package can't resolve real ELF library
path to readline in readline.buildinfo (right after cabal configure):

//===--------------------
$ cat readline.buildinfo
buildable: True
cc-options: 
ld-options: 
extra-libraries: readline ncurses
frameworks: 
//===--------------------

And second minor nit:
readline tarball is unusable after issuing 'cabal clean':
//===--------------------
$ cabal clean && cabal configure
cleaning...
Resolving dependencies...
Configuring readline-1.0.1.0...
configure: error: cannot find sources (include/HsReadline.h) in . or ..
//===--------------------

Practically these issues can be solved by moving lambdabot to haskeline tracks.

Thanks!

-- 

  Sergei
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 198 bytes
Desc: not available
Url : http://www.haskell.org/pipermail/haskell-cafe/attachments/20090921/d68236d7/signature.bin