Galchin, Vasili wrote:
I am trying to "cabal install" HSQL. I am using ghc 6.8.2. I get the following error about a non-visible/hidden package (old-time-1.0.0.0):
vigalchin@ubuntu:~$ cabal install hsql
[snip]
Database/HSQL.hsc:66:7: Could not find module `System.Time': it is a member of package old-time-1.0.0.0, which is hidden cabal: Error: some packages failed to install: hsql-1.7 failed during the building phase. The exception was: exit: ExitFailure 1 vigalchin@ubuntu:~$
This happens because Cabal invokes ghc with the -hide-all-packages flag. It then adds explicit -package flags for all packages listed as build dependencies. (The idea is to force developers to specify all their package's dependencies in the library's .cabal file.) Sadly, hsql looks unmaintained. You can try unpacking the hsql-1.7 tarball and adding the required dependencies to the build-depends: field of the .cabal file. Running 'cabal install' in the source directory will attempt to install the package.
What is the history of old-time package?
old-time was split out of the base package in base 3.0 (which ships with ghc 6.8.x). HTH, Bertram