difficulties installing iHaskell

问题

After much difficulty with cabal install ihaskell I read

If you have trouble with this installation, please make sure to try the Github version first. IHaskell is in rapid development, so Hackage may not always be the most recent. In order to install from Github, pull from the repository, and then install with ./build.sh all

This morning I upgraded to ghc-7.8.4 and cabal-1.22 and I am downloading iHaskell from the github repository using a simple git clone.

It is having difficulting locating several libraries.

/usr/bin/ld: cannot find -lHStransformers-compat-0.4.0.3-ghc7.8.4
/usr/bin/ld: cannot find -lHSmtl-2.1.3.1-ghc7.8.4
/usr/bin/ld: cannot find -lHStagged-0.7.3-ghc7.8.4
/usr/bin/ld: cannot find -lHStext-1.2.0.4-ghc7.8.4
/usr/bin/ld: cannot find -lHSvector-0.10.12.2-ghc7.8.4
/usr/bin/ld: cannot find -lHSunordered-containers-0.2.5.1-ghc7.8.4
/usr/bin/ld: cannot find -lHSsyb-0.4.4-ghc7.8.4
/usr/bin/ld: cannot find -lHSmtl-2.1.3.1-ghc7.8.4
/usr/bin/ld: cannot find -lHSdlist-0.7.1-ghc7.8.4
/usr/bin/ld: cannot find -lHSattoparsec-0.12.1.3-ghc7.8.4
/usr/bin/ld: cannot find -lHSscientific-0.3.3.7-ghc7.8.4
/usr/bin/ld: cannot find -lHShashable-1.2.3.1-ghc7.8.4

Unfortunately I can verify some of these are present.

me@ubuntu:~/Downloads/IHaskell$ cabal install mtl
Resolving dependencies...
All the requested packages are already installed:
mtl-2.2.1
Use --reinstall if you want to reinstall anyway

ld seems to be more of a C++ error than a Haskell error but I don't know how to deal.

• usr/bin/ld: cannot find -l<nameOfTheLibrary>

回答1:

After reading on StackOverflow and posting several issues on Github, I learned that my symlink to cabal was out of date. For some reason it pointed to version 16 even after I downloaded and installed version 22.

semigroupoids Issue #21

Even after updating with cabal install cabal-install it still didn't recognize sandbox init and it fact cabal -V showed it was still version 16.

Using where cabal I found the faulty cabal executable from my ghc-7.6 installation and replaced it with a symlink. In my case

sudo ln -s /home/jdm/.cabal/bin/cabal /usr/bin/cabal

So now I have cabal version 23, I opened a sandbox and profunctors (and iHaskell) install perfectly. Case closed.

来源：https://stackoverflow.com/questions/29052530/difficulties-installing-ihaskell