Thanks,
I should have been more precise. It is possible to install an older
version of Haskell Platform (containing ghc 7.6.3) in the usual
Fedora 21 way: yum -y install haskell-platform.
I am trying to install the most recent version of the Haskell
Platform, version 2014.2.0.0, and for this only a Debian
binary is provided. This doesn't work under Fedora 21.
I tried using the source distribution for HP 2014.2.0.0, and this
requires an already installed HP, so I installed the one that
includes ghc 7.6.3. The build of the source distribution failed
on the step that tries to create hptool due to "cannot satisfy"
applied to hastache-0.6.1...
On Tue, Dec 30, 2014 at 6:02 PM, Alexey Shmalko
Adding /usr/lib64 or /usr/lib64/openssl/engines to LD_LIBRARY_PATH doesn't help, even though libgmp.so is located in the latter directory.
Are you sure you have libgmp.so and not libgmp.so.3?
If you have libgmp.so.3, you should symlink libgmp.so to libgmp.so.3 or install package with libgmp.so.
You could also try using strace. System call trace should help figuring out what's going on.
Regards, Alexey