there wouldn't be any issue with using the 6.8.x binaries. we'd ideally
like to be working with the latest source tree (we're planning on tweaking
the source, specifically in the parallel and concurrency libraries). but
the distro we're using to compile the sources is the 6.10 for 64-bit Linux
(the one that expects the libedit.so.0 as opposed to libedit.so.2). so
maybe we should drop back to 6.8 and use the Red Hat-specific distro?
-james
On Fri, Nov 14, 2008 at 1:00 AM, Don Stewart
We've had unbelievable problems getting past this ridiculous 'unable to load object file or shared library libedit.so.0' error when attempting to build the 6.10.1 source tree. We initially just built editline in a user directory and attempted to manipulate environment variables to help
linker (e.g. setting LIBRARY_PATH, LD_LIBRARY_PATH, and CPATH) - but
james.swaine: the this
did no good.
We then just installed the editline package so it's available globally and the libraries (specifically libedit.so.0) live in /usr/local/lib, so it should be found with no problem. Not so for ghc - same error. We're running this on Red Hat.
What does ldd say?
It should say something like this (on Arch Linux):
$ ldd /usr/lib/ghc-6.10.0/ghc linux-vdso.so.1 => (0x00007fffb09fe000) libedit.so.0 => /usr/lib/libedit.so.0 (0x00007f6aa8479000) libncursesw.so.5 => /lib/libncursesw.so.5 (0x00007f6aa820f000) libutil.so.1 => /lib/libutil.so.1 (0x00007f6aa800c000) libdl.so.2 => /lib/libdl.so.2 (0x00007f6aa7e08000) libm.so.6 => /lib/libm.so.6 (0x00007f6aa7b85000) libgmp.so.3 => /usr/lib/libgmp.so.3 (0x00007f6aa7943000) librt.so.1 => /lib/librt.so.1 (0x00007f6aa773b000) libpthread.so.0 => /lib/libpthread.so.0 (0x00007f6aa7520000) libc.so.6 => /lib/libc.so.6 (0x00007f6aa71cc000) /lib/ld-linux-x86-64.so.2 (0x00007f6aa86a7000)
For example, let's you know if the system linker can see libedit (and the other C libraries GHC uses)
I'm part of a research group at Northwestern University that is exploring the use of ghc and associated libraries for some upcoming projects. It's a shame that this is so difficult to even compile/install, and nobody seems to be able to figure out what's wrong.
Do you have the option of using a distro package? Has GHC 6.10.x been packaged for your distro yet? Do you have the option of using GHC 6.8.x for now, or is there some feature in 6.10.x you expect to depend on?
-- Don