Grand. Thanks!
On 12/12/2011, Felipe Almeida Lessa <[email protected]> wrote: > On Mon, Dec 12, 2011 at 6:25 PM, Matthew Farkas-Dyck > <[email protected]> wrote: >> I have written some code that can be compiled with either of two >> libraries, with no modification. How can I tell Cabal? >> >> I tried "||" but it failed to parse. >> >> I could find which package is available in the build script, and then >> call defaultMainNoRead with the appropriate GenericPackageDescription, >> but I'm not sure how to find this system-agnostically. > > You just need to use flags. Something like > > Flag usethis > Description: Use this instead of that > Default: False > > Library > Build-depends: ...everything else... > if flag(usethis) > Build-depends: this == 0.1.* > else > Build-depends: that == 4.0.* > > You don't need to care about usethis. If 'that' is not installed but > 'this' is, Cabal will automatically turn 'usethis' flag on. > > Cheers, > > -- > Felipe. > -- Matthew Farkas-Dyck _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
