Excerpts from Cetin Sert's message of Tue Sep 23 05:55:21 -0500 2008:
Let's say I go and compile a library from sources and install it through Cabal. How can I update the binary version of the library Cabal installed after recompiling the library using newer/modified sources?
I'm not quite sure I understand the question - if you for example install foo 0.1 using cabal, and then you want foo 0.2, you just install it with the same procedures. In this case, the higher version number means the other is 'shadowed' by it, and if you explicitly need to use foo 0.1, you can either specify this as a constraint of the form:
build-depends: foo == 0.1
in the package's .cabal file, or you will have to explicitly pass ghc/ghci the flag:
-hide-package foo-0.2
Otherwise, GHC will default to building anything that depends on foo against the newest version. OTOH, if you for example install foo 0.1 from stable sources, then checkout the HEAD version which is also listed as v0.1 in the .cabal file, reinstalling it will simply overwrite the old version entirely. Does that answer your query? Austin