I'm looking for a way of specifying language extensions in a way which will work in all versions of GHC from 6.4 onwards. GHC 6.4 does not support the LANGUAGE pragma. Specifying language options in the OPTIONS_GHC pragma starts to produce deprecation warnings in 6.10, and will presumably eventually fail altogether. Any sort of preprocessing at the beginning of a file appears to insert enough noise to inhibit recognition of file-header pragmas. (Cpphs doesn't appear to help here.) Attempting preprocessing inside a leading OPTIONS_GHC pragma fails because it apparently attempts to interpret the pragma *before* invoking the preprocessor. The only remaining option I can see is to have a completely separate version of the file for GHC 6.4. Have I missed anything? -- Iain Alexander ia@stryx.demon.co.uk