-
{-
We need to do some ugly hacks here as base mix of portable and
unportable stuff, as well as home to some GHC magic.
import Control.Monad
import Data.List
import Distribution.PackageDescription
-import Distribution.Setup
import Distribution.Simple
import Distribution.Simple.LocalBuildInfo
import Distribution.Simple.Utils
import System.Cmd
-import System.Environment
import System.FilePath
-import System.Info
+import System.Exit
+import System.Directory
+import Control.Exception (try)
main :: IO ()
-main = do args <- getArgs
- let (ghcArgs, args') = extractGhcArgs args
- (confArgs, args'') = extractConfigureArgs args'
- hooks = defaultUserHooks {
- confHook = add_extra_deps
- $ confHook defaultUserHooks,
- postConf = add_configure_options confArgs
- $ postConf defaultUserHooks,
+main = do let hooks = defaultUserHooks {
buildHook = build_primitive_sources
- $ add_ghc_options ghcArgs
- $ filter_modules_hook
$ buildHook defaultUserHooks,
- makefileHook = add_ghc_options ghcArgs
- $ filter_modules_hook
+ makefileHook = build_primitive_sources
$ makefileHook defaultUserHooks,
- regHook = add_extra_libs
- $ regHook defaultUserHooks,
- instHook = filter_modules_hook
- $ instHook defaultUserHooks }
- withArgs args'' $ defaultMainWithHooks hooks
-
-extractGhcArgs :: [String] -> ([String], [String])
-extractGhcArgs = extractPrefixArgs "--ghc-option="
-
-extractConfigureArgs :: [String] -> ([String], [String])
-extractConfigureArgs = extractPrefixArgs "--configure-option="
-
-extractPrefixArgs :: String -> [String] -> ([String], [String])
-extractPrefixArgs the_prefix args
- = let f [] = ([], [])
- f (x:xs) = case f xs of
- (wantedArgs, otherArgs) ->
- case removePrefix the_prefix x of
- Just wantedArg ->
- (wantedArg:wantedArgs, otherArgs)
- Nothing ->
- (wantedArgs, x:otherArgs)
- in f args
-
-removePrefix :: String -> String -> Maybe String
-removePrefix "" ys = Just ys
-removePrefix _ "" = Nothing
-removePrefix (x:xs) (y:ys)
- | x == y = removePrefix xs ys
- | otherwise = Nothing
+ haddockHook = build_primitive_sources
+ $ haddockHook defaultUserHooks }
+ defaultMainWithHooks hooks
type Hook a = PackageDescription -> LocalBuildInfo -> UserHooks -> a -> IO ()
-type ConfHook = PackageDescription -> ConfigFlags -> IO LocalBuildInfo
-type PostConfHook = Args -> ConfigFlags -> PackageDescription -> LocalBuildInfo
- -> IO ()
-
--- type PDHook = PackageDescription -> ConfigFlags -> IO ()
build_primitive_sources :: Hook a -> Hook a
build_primitive_sources f pd lbi uhs x
"primops.txt"]
primhs = joinPath ["GHC", "Prim.hs"]
primopwrappers = joinPath ["GHC", "PrimopWrappers.hs"]
+ primhs_tmp = addExtension primhs "tmp"
+ primopwrappers_tmp = addExtension primopwrappers "tmp"
maybeExit $ system (genprimopcode ++ " --make-haskell-source < "
- ++ primops ++ " > " ++ primhs)
+ ++ primops ++ " > " ++ primhs_tmp)
+ maybeUpdateFile primhs_tmp primhs
maybeExit $ system (genprimopcode ++ " --make-haskell-wrappers < "
- ++ primops ++ " > " ++ primopwrappers)
+ ++ primops ++ " > " ++ primopwrappers_tmp)
+ maybeUpdateFile primopwrappers_tmp primopwrappers
f pd lbi uhs x
-add_ghc_options :: [String] -> Hook a -> Hook a
-add_ghc_options args f pd lbi uhs x
- = do let lib' = case library pd of
- Just lib ->
- let bi = libBuildInfo lib
- opts = options bi ++ [(GHC, args)]
- bi' = bi { options = opts }
- in lib { libBuildInfo = bi' }
- Nothing -> error "Expected a library"
- pd' = pd { library = Just lib' }
- f pd' lbi uhs x
-
-add_configure_options :: [String] -> PostConfHook -> PostConfHook
-add_configure_options args f as cfs pd lbi
- = f (as ++ args) cfs pd lbi
-
-filter_modules_hook :: Hook a -> Hook a
-filter_modules_hook f pd lbi uhs x
- = let build_filter = case compilerFlavor $ compiler lbi of
- GHC -> forGHCBuild
- _ -> isPortableBuild
- lib' = case library pd of
- Just lib ->
- let ems = filter build_filter (exposedModules lib)
- in lib { exposedModules = ems }
- Nothing -> error "Expected a library"
- pd' = pd { library = Just lib' }
- in f pd' lbi uhs x
-
-isPortableBuild :: String -> Bool
-isPortableBuild s
- | "GHC" `isPrefixOf` s = False
- | "Data.Generics" `isPrefixOf` s = False
- | otherwise = s `notElem` ["Foreign.Concurrent", "System.Process"]
-
-forGHCBuild :: String -> Bool
-forGHCBuild = ("GHC.Prim" /=)
-
-add_extra_deps :: ConfHook -> ConfHook
-add_extra_deps f pd cf
- = do lbi <- f pd cf
- case compilerFlavor (compiler lbi) of
- GHC ->
- do -- Euch. We should just add the right thing to the lbi
- -- ourselves rather than rerunning configure.
- let pd' = pd { buildDepends = Dependency "rts" AnyVersion
- : buildDepends pd }
- f pd' cf
- _ ->
- return lbi
-
-add_extra_libs :: Hook a -> Hook a
-add_extra_libs f pd lbi uhs x
- = let pd' = if (os == "mingw32") && (compilerFlavor (compiler lbi) == GHC)
- then case library pd of
- Just lib ->
- let lib_bi = libBuildInfo lib
- lib_bi' = lib_bi { extraLibs = "wsock32"
- : "msvcrt"
- : "kernel32"
- : "user32"
- : "shell32"
- : extraLibs lib_bi }
- lib' = lib { libBuildInfo = lib_bi' }
- in pd { library = Just lib' }
- Nothing -> error "Expected a library"
- else pd
- in f pd' lbi uhs x
+-- Replace a file only if the new version is different from the old.
+-- This prevents make from doing unnecessary work after we run 'setup makefile'
+maybeUpdateFile :: FilePath -> FilePath -> IO ()
+maybeUpdateFile source target = do
+ r <- rawSystem "cmp" ["-s" {-quiet-}, source, target]
+ case r of
+ ExitSuccess -> removeFile source
+ ExitFailure _ -> do try (removeFile target); renameFile source target
projects / ghc-base.git / blobdiff