[Git][ghc/ghc][wip/rts-configure-0] Give the RTS it's own configure script

John Ericson (@Ericson2314) gitlab at gitlab.haskell.org
Fri Dec 30 17:19:51 UTC 2022



John Ericson pushed to branch wip/rts-configure-0 at Glasgow Haskell Compiler / GHC


Commits:
6118a8a5 by John Ericson at 2022-12-30T12:18:50-05:00
Give the RTS it's own configure script

Currently it doesn't do much anything, we are just trying to introduce
it without breaking the build. Later, we will move functionality from
the top-level configure script over to it.

- - - - -


11 changed files:

- boot
- hadrian/src/Base.hs
- hadrian/src/Hadrian/Haskell/Cabal/Parse.hs
- hadrian/src/Rules/Generate.hs
- hadrian/src/Rules/Lint.hs
- hadrian/src/Rules/Register.hs
- libraries/base/.gitignore
- m4/fp_find_libdw.m4
- rts/.gitignore
- + rts/configure.ac
- rts/rts.cabal.in


Changes:

=====================================
boot
=====================================
@@ -63,7 +63,7 @@ def autoreconf():
     else:
         reconf_cmd = 'autoreconf'
 
-    for dir_ in ['.'] + glob.glob('libraries/*/'):
+    for dir_ in ['.', 'rts'] + glob.glob('libraries/*/'):
         if os.path.isfile(os.path.join(dir_, 'configure.ac')):
             print("Booting %s" % dir_)
             # Update config.sub in submodules


=====================================
hadrian/src/Base.hs
=====================================
@@ -20,9 +20,6 @@ module Base (
     module Stage,
     module Way,
 
-    -- * Files
-    configH,
-
     -- * Paths
     hadrianPath, configPath, configFile, sourcePath, shakeFilesDir,
     stageBinPath, stageLibPath, templateHscPath,
@@ -72,11 +69,6 @@ configFile = configPath -/- "system.config"
 sourcePath :: FilePath
 sourcePath = hadrianPath -/- "src"
 
--- TODO: Change @mk/config.h@ to @shake-build/cfg/config.h at .
--- | Path to the generated @mk/config.h@ file.
-configH :: FilePath
-configH = "mk/config.h"
-
 -- | The directory in 'buildRoot' containing the Shake database and other
 -- auxiliary files generated by Hadrian.
 shakeFilesDir :: FilePath


=====================================
hadrian/src/Hadrian/Haskell/Cabal/Parse.hs
=====================================
@@ -146,7 +146,7 @@ configurePackage context at Context {..} = do
     need deps
 
     -- Figure out what hooks we need.
-    hooks <- case C.buildType (C.flattenPackageDescription gpd) of
+    hooks0 <- case C.buildType (C.flattenPackageDescription gpd) of
         C.Configure -> pure C.autoconfUserHooks
         -- The 'time' package has a 'C.Custom' Setup.hs, but it's actually
         -- 'C.Configure' plus a @./Setup test@ hook. However, Cabal is also
@@ -155,13 +155,15 @@ configurePackage context at Context {..} = do
             configureExists <- doesFileExist $
                 replaceFileName (pkgCabalFile package) "configure"
             pure $ if configureExists then C.autoconfUserHooks else C.simpleUserHooks
-        -- Not quite right, but good enough for us:
-        _ | package == rts ->
-            -- Don't try to do post configuration validation for 'rts'. This
-            -- will simply not work, due to the @ld-options@ and @Stg.h at .
-            pure $ C.simpleUserHooks { C.postConf = \_ _ _ _ -> return () }
-          | otherwise -> pure C.simpleUserHooks
-
+        C.Simple -> pure C.simpleUserHooks
+        C.Make -> fail "build-type: Make is not supported"
+    let hooks
+            -- Not quite right, but good enough for us:
+            | package == rts =
+                -- Don't try to do post configuration validation for 'rts'. This
+                -- will simply not work, due to the @ld-options@ and @Stg.h at .
+                hooks0 { C.postConf = \_ _ _ _ -> return () }
+            | otherwise = hooks0
     -- Compute the list of flags, and the Cabal configuration arguments
     flavourArgs <- args <$> flavour
     flagList    <- interpret (target context (Cabal Flags stage) [] []) flavourArgs


=====================================
hadrian/src/Rules/Generate.hs
=====================================
@@ -147,7 +147,8 @@ generatePackageCode context@(Context stage pkg _ _) = do
         root -/- "**" -/- dir -/- "cmm/AutoApply.cmm" %> \file ->
             build $ target context GenApply [] [file]
         let go gen file = generate file (semiEmptyTarget stage) gen
-        root -/- "**" -/- dir -/- "include/ghcautoconf.h" %> go generateGhcAutoconfH
+        root -/- "**" -/- dir -/- "include/ghcautoconf.h" %> \_ ->
+            need . pure =<< pkgSetupConfigFile context
         root -/- "**" -/- dir -/- "include/ghcplatform.h" %> go generateGhcPlatformH
         root -/- "**" -/- dir -/- "include/DerivedConstants.h" %> genPlatformConstantsHeader context
         root -/- "**" -/- dir -/- "include/rts/EventLogConstants.h" %> genEventTypes "--event-types-defines"
@@ -486,26 +487,6 @@ generateConfigHs = do
     stageString (Stage0 GlobalLibs) = error "stageString: StageBoot"
 
 
--- | Generate @ghcautoconf.h@ header.
-generateGhcAutoconfH :: Expr String
-generateGhcAutoconfH = do
-    trackGenerateHs
-    configHContents  <- expr $ mapMaybe undefinePackage <$> readFileLines configH
-    return . unlines $
-        [ "#if !defined(__GHCAUTOCONF_H__)"
-        , "#define __GHCAUTOCONF_H__" ]
-        ++ configHContents ++
-        [ "#endif /* __GHCAUTOCONF_H__ */" ]
-  where
-    undefinePackage s
-        | "#define PACKAGE_" `isPrefixOf` s
-            = Just $ "/* #undef " ++ takeWhile (/=' ') (drop 8 s) ++ " */"
-        | "#define __GLASGOW_HASKELL" `isPrefixOf` s
-            = Nothing
-        | "/* REMOVE ME */" == s
-            = Nothing
-        | otherwise = Just s
-
 -- | Generate @Version.hs@ files.
 generateVersionHs :: Expr String
 generateVersionHs = do


=====================================
hadrian/src/Rules/Lint.hs
=====================================
@@ -11,13 +11,15 @@ lintRules :: Rules ()
 lintRules = do
   "lint:base" ~> lint base
   "lint:compiler" ~> lint compiler
+
+  -- Ensure that autoconf scripts, which are usually run by Cabal, are run to
+  -- avoid depending upon Cabal from the stage0 compiler..
   "libraries" -/- "base" -/- "include" -/- "HsBaseConfig.h" %> \_ ->
       -- ./configure is called here manually because we need to generate
       -- HsBaseConfig.h, which is created from HsBaseConfig.h.in. ./configure
-      -- is usually run by Cabal which generates this file but if we do that
-      -- then hadrian thinks it needs to build the stage0 compiler before
-      -- attempting to configure. Therefore we just run it directly here.
       cmd_ (Cwd "libraries/base") "./configure"
+  "rts" -/- "include" -/- "ghcautoconf.h" %> \_ ->
+      cmd_ (Cwd "rts") "./configure"
 
 lint :: Action () -> Action ()
 lint lintAction = do


=====================================
hadrian/src/Rules/Register.hs
=====================================
@@ -45,6 +45,12 @@ configurePackageRules = do
           isGmp <- (== "gmp") <$> interpretInContext ctx getBignumBackend
           when isGmp $
             need [buildP -/- "include/ghc-gmp.h"]
+        when (pkg == rts) $ do
+          -- Rts.h is a header listed in the cabal file, and configuring
+          -- therefore wants to ensure that the header "works" post-configure.
+          -- But it (transitively) includes this, so we must ensure it exists
+          -- for that check to work.
+          need [buildP -/- "include/ghcplatform.h"]
         Cabal.configurePackage ctx
 
     root -/- "**/autogen/cabal_macros.h" %> \out -> do


=====================================
libraries/base/.gitignore
=====================================
@@ -19,4 +19,3 @@
 /include/EventConfig.h
 /include/HsBaseConfig.h
 /include/HsBaseConfig.h.in
-


=====================================
m4/fp_find_libdw.m4
=====================================
@@ -48,9 +48,6 @@ AC_DEFUN([FP_FIND_LIBDW],
   AC_SUBST(UseLibdw)
   if test $UseLibdw = "YES" ; then
     USE_LIBDW=1
-    AC_SUBST([CabalHaveLibdw],[True])
-  else
-    AC_SUBST([CabalHaveLibdw],[False])
   fi
   AC_DEFINE_UNQUOTED([USE_LIBDW], [$USE_LIBDW], [Set to 1 to use libdw])
 ])


=====================================
rts/.gitignore
=====================================
@@ -16,3 +16,6 @@
 /config.log
 /config.status
 /configure
+
+/ghcautoconf.h.autoconf.in
+/ghcautoconf.h.autoconf


=====================================
rts/configure.ac
=====================================
@@ -0,0 +1,57 @@
+# Configure script template for the Run-time System of GHC
+#
+# Process with 'autoreconf' to get a working configure script.
+#
+# For the generated configure script, do "./configure --help" to
+# see what flags are available. (Better yet, read the documentation!)
+#
+
+AC_INIT([GHC run-time system], [1.0.2], [libraries at haskell.org], [rts])
+
+AC_CONFIG_MACRO_DIRS([../m4])
+
+# Safety check: Ensure that we are in the correct source directory.
+AC_CONFIG_SRCDIR([include/rts/Constants.h])
+
+dnl * We require autoconf version 2.69 due to
+dnl   https://bugs.ruby-lang.org/issues/8179. Also see #14910.
+dnl * We need 2.50 due to the use of AC_SYS_LARGEFILE and AC_MSG_NOTICE.
+dnl * We need 2.52 due to the use of AS_TR_CPP and AS_TR_SH.
+dnl * Using autoconf 2.59 started to give nonsense like this
+dnl     #define SIZEOF_CHAR 0
+dnl   recently.
+AC_PREREQ([2.69])
+
+AC_CONFIG_HEADERS([ghcautoconf.h.autoconf])
+
+# We have to run these unconditionally, but we may discard their
+# results in the following code
+AC_CANONICAL_BUILD
+AC_CANONICAL_HOST
+
+GHC_CONVERT_PLATFORM_PARTS([host], [Host])
+FPTOOLS_SET_PLATFORM_VARS([host], [Host])
+FPTOOLS_SET_HASKELL_PLATFORM_VARS([Host])
+
+AC_OUTPUT
+
+dnl ######################################################################
+dnl Generate ghcautoconf.h
+dnl ######################################################################
+
+[
+mkdir -p include
+touch include/ghcautoconf.h
+> include/ghcautoconf.h
+
+echo "#if !defined(__GHCAUTOCONF_H__)" >> include/ghcautoconf.h
+echo "#define __GHCAUTOCONF_H__" >> include/ghcautoconf.h
+# Copy the contents of $srcdir/../mk/config.h, turning '#define PACKAGE_FOO
+# "blah"' into '/* #undef PACKAGE_FOO */' to avoid clashes.
+cat $srcdir/../mk/config.h ghcautoconf.h.autoconf | sed \
+   -e 's,^\([	 ]*\)#[	 ]*define[	 ][	 ]*\(PACKAGE_[A-Z]*\)[	 ][ 	]*".*".*$,\1/* #undef \2 */,' \
+   -e '/__GLASGOW_HASKELL/d' \
+   -e '/REMOVE ME/d' \
+   >> include/ghcautoconf.h
+echo "#endif /* __GHCAUTOCONF_H__ */" >> include/ghcautoconf.h
+]


=====================================
rts/rts.cabal.in
=====================================
@@ -1,9 +1,24 @@
 cabal-version: 3.0
 name: rts
 version: 1.0.2
+synopsis: The GHC runtime system
+description:
+    The GHC runtime system.
+
+    Code produced by GHC links this library to provide missing functionality
+    that cannot be written in Haskell itself.
 license: BSD-3-Clause
 maintainer: glasgow-haskell-users at haskell.org
-build-type: Simple
+build-type: Configure
+
+extra-source-files:
+    configure
+    configure.ac
+
+extra-tmp-files:
+    autom4te.cache
+    config.log
+    config.status
 
 source-repository head
     type:     git
@@ -206,6 +221,7 @@ library
 
       include-dirs: include
       includes: Rts.h
+      autogen-includes: ghcautoconf.h
       install-includes: Cmm.h HsFFI.h MachDeps.h Rts.h RtsAPI.h Stg.h
                         ghcautoconf.h ghcconfig.h ghcplatform.h ghcversion.h
                         -- ^ from include



View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/6118a8a58fcd1650f8ba3068050bebb3add08e04

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/6118a8a58fcd1650f8ba3068050bebb3add08e04
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