I am trying to install Happstack using the following command:
cabal install happstack
Specifications:
- Mac OS X 10.10 (Yosemite)
- GHC 7.8.3
- cabal 1.20.0.2
Error Messages:
ld: library not found for -lHSstm-2.4.3-ghc7.8.3
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Failed to install threads-0.5.1.2
cabal: Error: some packages failed to install:
happstack-7.0.2 depends on threads-0.5.1.2 which failed to install.
happstack-server-7.3.9 depends on threads-0.5.1.2 which failed to install.
system-filepath-0.4.12 failed during the building phase. The exception was:
ExitFailure 1
threads-0.5.1.2 failed during the building phase. The exception was:
ExitFailure 1