GHC 7.4.2 on Ubuntu Trusty

[Yuras Shumovich]

On Wed, 2014-10-22 at 13:48 +0300, Yitzchak Gale wrote:
> In order support some older software that we released, we need
> to get a working GHC 7.4.2 on Ubuntu Trusty. We currently have
> GHC 7.8.3.
> 
> The binary tarball for GHC 7.4.2 does not install on Trusty due to
> multiple incompatibilities. For example, GHC requires GMP 3, but
> Trusty only provides GMP >= 4. Etc.

You can try to make a symlink from libgmp.so.10 to libgmp.so.3 AFAIK ghc
doesn't use anything specific to new gmp. Then you can recompile with
ghc from sources and link it with gmp10.

Also precise provides both gmp3 and gmp10, so you can bootstrap on
precise using 7.4.2/gmp3 to get 7.4.2/gmp10 binary.

> I tried building GHC 7.4.2. from source on Trusty. But the process
> won't boot from our currently installed GHC 7.8.3. The oldest
> GHC binary I can get is GHC 7.6.3, which happens to be
> still available from the Ubuntu distribution itself (neither the binary
> tarball nor compiling from source work for GHC 7.6.3 on Trusty
> either). But booting from GHC 7.6.3 won't work either.
> 
> How do I get a working GHC 7.4.2 on Trusty?
> 
> Thanks,
> Yitz
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