Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC Commits: a3b431f3 by David Eichmann at 2026-06-04T10:10:19+00:00 Hadrian: convert env variable ACLOCAL_PATH to unix paths. Convert ACLOCAL_PATH to a unix style path when invoking autoreconf. Autoreconf doesn't handle windows paths. See Note [Autoreconf unix paths from ACLOCAL_PATH]. Fixes #27311 - - - - - 3 changed files: - boot - hadrian/src/Hadrian/Oracles/Path.hs - hadrian/src/Rules/BinaryDist.hs Changes: ===================================== boot ===================================== @@ -52,9 +52,8 @@ def autoreconf(): # Run autoreconf on everything that needs it. processes = {} if os.name == 'nt': - # Get the normalized ACLOCAL_PATH for Windows - # This is necessary since on Windows this will be a Windows - # path, which autoreconf doesn't know doesn't know how to handle. + # Convert ACLOCAL_PATH env variable to unix style paths on Windows + # See Note [Autoreconf unix paths from ACLOCAL_PATH] ac_local = os.getenv('ACLOCAL_PATH', '') ac_local_arg = re.sub(r';', r':', ac_local) ac_local_arg = re.sub(r'\\', r'/', ac_local_arg) ===================================== hadrian/src/Hadrian/Oracles/Path.hs ===================================== @@ -1,6 +1,7 @@ {-# LANGUAGE TypeFamilies #-} module Hadrian.Oracles.Path ( - lookupInPath, fixAbsolutePathOnWindows, pathOracle + lookupInPath, fixAbsolutePathOnWindows, fixUnixPathsOnWindows, + pathOracle ) where import Control.Monad @@ -33,6 +34,14 @@ fixAbsolutePathOnWindows path = else return path +-- | Fix a unix path list on Windows: +-- * "C:\\foo\\bar;C:\\msys2\\bin" => "/c/foo/bar:/c/msys2/bin" +fixUnixPathsOnWindows :: FilePath -> Action FilePath +fixUnixPathsOnWindows paths = + if isWindows + then askOracle $ UnixPathList paths + else return paths + newtype LookupInPath = LookupInPath String deriving (Binary, Eq, Hashable, NFData, Show) type instance RuleResult LookupInPath = String @@ -41,6 +50,10 @@ newtype WindowsPath = WindowsPath FilePath deriving (Binary, Eq, Hashable, NFData, Show) type instance RuleResult WindowsPath = String +newtype UnixPathList = UnixPathList FilePath + deriving (Binary, Eq, Hashable, NFData, Show) +type instance RuleResult UnixPathList = String + -- | Oracles for looking up paths. These are slow and require caching. pathOracle :: Rules () pathOracle = do @@ -50,6 +63,12 @@ pathOracle = do putVerbose $ "| Windows path mapping: " ++ path ++ " => " ++ windowsPath return windowsPath + void $ addOracleCache $ \(UnixPathList paths) -> do + Stdout out <- quietly $ cmd ["cygpath", "-p", "-u", paths] + let unixPaths = unifyPath $ dropWhileEnd isSpace out + putVerbose $ "| Unix path mapping: " ++ paths ++ " => " ++ unixPaths + return unixPaths + void $ addOracleCache $ \(LookupInPath name) -> do path <- liftIO getSearchPath exes <- liftIO (findExecutablesInDirectories path name) ===================================== hadrian/src/Rules/BinaryDist.hs ===================================== @@ -3,18 +3,19 @@ module Rules.BinaryDist where import CommandLine import Context +import Data.Either +import qualified Data.Set as Set import Expression +import Hadrian.Oracles.Path (fixUnixPathsOnWindows) +import Oracles.Flavour import Oracles.Setting import Packages +import Rules.Generate (generateSettings) import Settings +import qualified System.Directory.Extra as IO import Settings.Program (programContext) import Target import Utilities -import qualified System.Directory.Extra as IO -import Data.Either -import qualified Data.Set as Set -import Oracles.Flavour -import Rules.Generate (generateSettings) {- Note [Binary distributions] @@ -343,7 +344,25 @@ bindistRules = do ghcRoot <- topDirectory copyFile (ghcRoot -/- "aclocal.m4") (ghcRoot -/- "distrib" -/- "aclocal.m4") copyDirectory (ghcRoot -/- "m4") (ghcRoot -/- "distrib") - buildWithCmdOptions [] $ + + -- Note [Autoreconf unix paths from ACLOCAL_PATH] + -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + -- On Windows, autoreconf fails when the ACLOCAL_PATH env variable contains Windows- + -- style paths. This happens because MSYS2 automatically converts env variables to + -- Windows-style paths. To fix this, we convert ACLOCAL_PATH back to Unix style. + -- This is done both in the boot Python script and here when building a bindist. + win_host <- isWinHost + env <- if not win_host + then pure [] + else do + aclocalPathMay <- getEnv "ACLOCAL_PATH" + case aclocalPathMay of + Nothing -> pure [] + Just aclocalPath -> do + unixAclocalPath <- fixUnixPathsOnWindows aclocalPath + pure [AddEnv "ACLOCAL_PATH" unixAclocalPath] + + buildWithCmdOptions env $ target (vanillaContext Stage1 ghc) (Autoreconf $ ghcRoot -/- "distrib") [] [] -- We clean after ourselves, moving the configure script we generated in -- our bindist dir View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/a3b431f3cb46f4c23f7401ca195afe3b... -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/a3b431f3cb46f4c23f7401ca195afe3b... You're receiving this email because of your account on gitlab.haskell.org.