Cabal- A framework for packaging Haskell software




This deals with the configure phase. It provides the configure action which is given the package description and configure flags. It then tries to: configure the compiler; resolves any conditionals in the package description; resolve the package dependencies; check if all the extensions used by this package are supported by the compiler; check that all the build tools are available (including version checks if appropriate); checks for any required pkg-config packages (updating the BuildInfo with the results)

Then based on all this it saves the info in the LocalBuildInfo and writes it out to the dist/setup-config file. It also displays various details to the user, the amount of information displayed depending on the verbosity level.



configure :: (GenericPackageDescription, HookedBuildInfo) -> ConfigFlags -> IO LocalBuildInfoSource

Perform the "./setup configure" action. Returns the .setup-config file.

writePersistBuildConfig :: FilePath -> LocalBuildInfo -> IO ()Source

After running configure, output the LocalBuildInfo to the localBuildInfoFile.

getPersistBuildConfig :: FilePath -> IO LocalBuildInfoSource

Read the localBuildInfoFile. Error if it doesn't exist. Also fail if the file containing LocalBuildInfo is older than the .cabal file, indicating that a re-configure is required.

checkPersistBuildConfigOutdated :: FilePath -> FilePath -> IO BoolSource

Check that localBuildInfoFile is up-to-date with respect to the .cabal file.

ccLdOptionsBuildInfo :: [String] -> [String] -> BuildInfoSource

Makes a BuildInfo from C compiler and linker flags.

This can be used with the output from configuration programs like pkg-config and similar package-specific programs like mysql-config, freealut-config etc. For example:

 ccflags <- rawSystemProgramStdoutConf verbosity prog conf ["--cflags"]
 ldflags <- rawSystemProgramStdoutConf verbosity prog conf ["--libs"]
 return (ccldOptionsBuildInfo (words ccflags) (words ldflags))