[Git][ghc/ghc][wip/angerman/fix-rpath] [macOS] improved runpath handling
Moritz Angermann
gitlab at gitlab.haskell.org
Mon Aug 31 12:55:54 UTC 2020
Moritz Angermann pushed to branch wip/angerman/fix-rpath at Glasgow Haskell Compiler / GHC
Commits:
3bb2834d by Moritz Angermann at 2020-08-31T20:49:55+08:00
[macOS] improved runpath handling
In b592bd98ff25730bbe3c13d6f62a427df8c78e28 we started using
-dead_strip_dylib on macOS when lining dynamic libraries and binaries.
The underlying reason being the Load Command Size Limit in macOS
Sierra (10.14) and later.
GHC will produce @rpath/libHS... dependency entries together with a
corresponding RPATH entry pointing to the location of the libHS...
library. Thus for every library we produce two Load Commands. One to
specify the dependent library, and one with the path where to find it.
This makes relocating libraries and binaries easier, as we just need to
update the RPATH entry with the install_name_tool. The dynamic linker
will then subsitute each @rpath with the RPATH entries it finds in the
libraries load commands or the environement, when looking up @rpath
relative libraries.
-dead_strip_dylibs intructs the linker to drop unused libraries. This in
turn help us reduce the number of referenced libraries, and subsequently
the size of the load commands. This however does not remove the RPATH
entries. Subsequently we can end up (in extreme cases) with only a
single @rpath/libHS... entry, but 100s or more RPATH entries in the Load
Commands.
This patch rectifies this (slighly unorthodox) by passing *no* -rpath
arguments to the linker at link time, but -headerpad 8000. The
headerpad argument is in hexadecimal and the maxium 32k of the load
command size. This tells the linker to pad the load command section
enough for us to inject the RPATHs later. We then proceed to link the
library or binary with -dead_strip_dylibs, and *after* the linking
inspect the library to find the left over (non-dead-stripped)
dependencies (using otool). We find the corresponding RPATHs for each
@rpath relative dependency, and inject them into the library or binary
using the install_name_tool. Thus achieving a deadstripped dylib (and
rpaths) build product.
We can not do this in GHC, without starting to reimplement a dynamic
linker as we do not know which symbols and subsequently libraries are
necessary.
Commissioned-by: Mercury Technologies, Inc. (mercury.com)
- - - - -
15 changed files:
- aclocal.m4
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Runtime/Linker.hs
- compiler/GHC/Settings.hs
- compiler/GHC/Settings/IO.hs
- compiler/GHC/SysTools.hs
- compiler/GHC/SysTools/Tasks.hs
- configure.ac
- docs/users_guide/phases.rst
- hadrian/cfg/system.config.in
- hadrian/src/Oracles/Setting.hs
- hadrian/src/Rules/Generate.hs
- includes/ghc.mk
- mk/config.mk.in
Changes:
=====================================
aclocal.m4
=====================================
@@ -579,6 +579,18 @@ AC_DEFUN([FP_SETTINGS],
else
SettingsOptCommand="$OptCmd"
fi
+ if test -z "$OtoolCmd"
+ then
+ SettingsOtoolCommand="otool"
+ else
+ SettingsOtoolCommand="$OtoolCmd"
+ fi
+ if test -z "$InstallNameToolCmd"
+ then
+ SettingsInstallNameToolCommand="install_name_tool"
+ else
+ SettingsInstallNameToolCommand="$InstallNameToolCmd"
+ fi
SettingsCCompilerFlags="$CONF_CC_OPTS_STAGE2"
SettingsCxxCompilerFlags="$CONF_CXX_OPTS_STAGE2"
SettingsCCompilerLinkFlags="$CONF_GCC_LINKER_OPTS_STAGE2"
@@ -596,6 +608,8 @@ AC_DEFUN([FP_SETTINGS],
AC_SUBST(SettingsLdFlags)
AC_SUBST(SettingsArCommand)
AC_SUBST(SettingsRanlibCommand)
+ AC_SUBST(SettingsOtoolCommand)
+ AC_SUBST(SettingsInstallNameToolCommand)
AC_SUBST(SettingsDllWrapCommand)
AC_SUBST(SettingsWindresCommand)
AC_SUBST(SettingsLibtoolCommand)
=====================================
compiler/GHC/Driver/Pipeline.hs
=====================================
@@ -1787,9 +1787,12 @@ linkBinary' staticLink dflags o_files dep_units = do
rc_objs <- maybeCreateManifest dflags output_fn
- let link = if staticLink
- then GHC.SysTools.runLibtool
- else GHC.SysTools.runLink
+ let link dflags args | staticLink = GHC.SysTools.runLibtool dflags args
+ | platformOS platform == OSDarwin
+ = GHC.SysTools.runLink dflags args >> GHC.SysTools.runInjectRPaths dflags pkg_lib_paths output_fn
+ | otherwise
+ = GHC.SysTools.runLink dflags args
+
link dflags (
map GHC.SysTools.Option verbFlags
++ [ GHC.SysTools.Option "-o"
@@ -1856,7 +1859,11 @@ linkBinary' staticLink dflags o_files dep_units = do
++ pkg_link_opts
++ pkg_framework_opts
++ (if platformOS platform == OSDarwin
- then [ "-Wl,-dead_strip_dylibs" ]
+ -- dead_strip_dylibs, will remove unused dylibs, and thus save
+ -- space in the load commands. The -headerpad is necessary so
+ -- that we can inject more @rpath's later for the left over
+ -- libraries in the runInjectRpaths phase below.
+ then [ "-Wl,-dead_strip_dylibs", "-Wl,-headerpad,8000" ]
else [])
))
=====================================
compiler/GHC/Driver/Session.hs
=====================================
@@ -145,8 +145,8 @@ module GHC.Driver.Session (
versionedAppDir, versionedFilePath,
extraGccViaCFlags, globalPackageDatabasePath,
pgm_L, pgm_P, pgm_F, pgm_c, pgm_a, pgm_l, pgm_lm, pgm_dll, pgm_T,
- pgm_windres, pgm_libtool, pgm_ar, pgm_ranlib, pgm_lo, pgm_lc,
- pgm_lcc, pgm_i,
+ pgm_windres, pgm_libtool, pgm_ar, pgm_otool, pgm_install_name_tool,
+ pgm_ranlib, pgm_lo, pgm_lc, pgm_lcc, pgm_i,
opt_L, opt_P, opt_F, opt_c, opt_cxx, opt_a, opt_l, opt_lm, opt_i,
opt_P_signature,
opt_windres, opt_lo, opt_lc, opt_lcc,
@@ -885,6 +885,10 @@ pgm_lcc :: DynFlags -> (String,[Option])
pgm_lcc dflags = toolSettings_pgm_lcc $ toolSettings dflags
pgm_ar :: DynFlags -> String
pgm_ar dflags = toolSettings_pgm_ar $ toolSettings dflags
+pgm_otool :: DynFlags -> String
+pgm_otool dflags = toolSettings_pgm_otool $ toolSettings dflags
+pgm_install_name_tool :: DynFlags -> String
+pgm_install_name_tool dflags = toolSettings_pgm_install_name_tool $ toolSettings dflags
pgm_ranlib :: DynFlags -> String
pgm_ranlib dflags = toolSettings_pgm_ranlib $ toolSettings dflags
pgm_lo :: DynFlags -> (String,[Option])
@@ -2267,6 +2271,10 @@ dynamic_flags_deps = [
$ hasArg $ \f -> alterToolSettings $ \s -> s { toolSettings_pgm_libtool = f }
, make_ord_flag defFlag "pgmar"
$ hasArg $ \f -> alterToolSettings $ \s -> s { toolSettings_pgm_ar = f }
+ , make_ord_flag defFlag "pgmotool"
+ $ hasArg $ \f -> alterToolSettings $ \s -> s { toolSettings_pgm_otool = f}
+ , make_ord_flag defFlag "pgminstall_name_tool"
+ $ hasArg $ \f -> alterToolSettings $ \s -> s { toolSettings_pgm_install_name_tool = f}
, make_ord_flag defFlag "pgmranlib"
$ hasArg $ \f -> alterToolSettings $ \s -> s { toolSettings_pgm_ranlib = f }
@@ -3780,7 +3788,6 @@ defaultFlags settings
Opt_OmitYields,
Opt_PrintBindContents,
Opt_ProfCountEntries,
- Opt_RPath,
Opt_SharedImplib,
Opt_SimplPreInlining,
Opt_VersionMacros
@@ -3791,6 +3798,8 @@ defaultFlags settings
++ default_PIC platform
+ ++ default_RPath platform
+
++ concatMap (wayGeneralFlags platform) (defaultWays settings)
++ validHoleFitDefaults
@@ -3831,6 +3840,26 @@ default_PIC platform =
-- information.
_ -> []
+
+-- We usually want to use RPath, except on macOS (OSDarwin). On recent macOS
+-- version the number of load commands we can embed in a dynamic library are
+-- restricted. Hence since b592bd98ff2 we rely on -dead_strip_dylib to only
+-- link the needed dylibs instead of linking the full dependency closure.
+--
+-- If we split the library linking into injecting -rpath and -l @rpath/...
+-- components, we will reduce the number of libraries we link, however we will
+-- still inject one -rpath entry for each library, independent of their use.
+-- That is, we even inject -rpath values for libraries that we dead_strip in
+-- the end. As such we can run afoul of the load command size limit simply
+-- by polluting the load commands with RPATH entries.
+--
+-- Thus, we disable Opt_RPath by default on OSDarwin. The savvy user can always
+-- enable it with -use-rpath if they so wish.
+default_RPath :: Platform -> [GeneralFlag]
+default_RPath platform | platformOS platform == OSDarwin = []
+default_RPath _ = [Opt_RPath]
+
+
-- General flags that are switched on/off when other general flags are switched
-- on
impliedGFlags :: [(GeneralFlag, TurnOnFlag, GeneralFlag)]
=====================================
compiler/GHC/Runtime/Linker.hs
=====================================
@@ -929,20 +929,22 @@ dynLoadObjs hsc_env pls at PersistentLinkerState{..} objs = do
ldInputs =
concatMap (\l -> [ Option ("-l" ++ l) ])
(nub $ snd <$> temp_sos)
- ++ concatMap (\lp -> [ Option ("-L" ++ lp)
- , Option "-Xlinker"
- , Option "-rpath"
- , Option "-Xlinker"
- , Option lp ])
+ ++ concatMap (\lp -> Option ("-L" ++ lp)
+ : if gopt Opt_RPath dflags
+ then [ Option "-Xlinker"
+ , Option "-rpath"
+ , Option "-Xlinker"
+ , Option lp ]
+ else [])
(nub $ fst <$> temp_sos)
++ concatMap
- (\lp ->
- [ Option ("-L" ++ lp)
- , Option "-Xlinker"
- , Option "-rpath"
- , Option "-Xlinker"
- , Option lp
- ])
+ (\lp -> Option ("-L" ++ lp)
+ : if gopt Opt_RPath dflags
+ then [ Option "-Xlinker"
+ , Option "-rpath"
+ , Option "-Xlinker"
+ , Option lp ]
+ else [])
minus_big_ls
-- See Note [-Xlinker -rpath vs -Wl,-rpath]
++ map (\l -> Option ("-l" ++ l)) minus_ls,
=====================================
compiler/GHC/Settings.hs
=====================================
@@ -34,6 +34,8 @@ module GHC.Settings
, sPgm_windres
, sPgm_libtool
, sPgm_ar
+ , sPgm_otool
+ , sPgm_install_name_tool
, sPgm_ranlib
, sPgm_lo
, sPgm_lc
@@ -107,6 +109,8 @@ data ToolSettings = ToolSettings
, toolSettings_pgm_windres :: String
, toolSettings_pgm_libtool :: String
, toolSettings_pgm_ar :: String
+ , toolSettings_pgm_otool :: String
+ , toolSettings_pgm_install_name_tool :: String
, toolSettings_pgm_ranlib :: String
, -- | LLVM: opt llvm optimiser
toolSettings_pgm_lo :: (String, [Option])
@@ -216,6 +220,10 @@ sPgm_libtool :: Settings -> String
sPgm_libtool = toolSettings_pgm_libtool . sToolSettings
sPgm_ar :: Settings -> String
sPgm_ar = toolSettings_pgm_ar . sToolSettings
+sPgm_otool :: Settings -> String
+sPgm_otool = toolSettings_pgm_otool . sToolSettings
+sPgm_install_name_tool :: Settings -> String
+sPgm_install_name_tool = toolSettings_pgm_install_name_tool . sToolSettings
sPgm_ranlib :: Settings -> String
sPgm_ranlib = toolSettings_pgm_ranlib . sToolSettings
sPgm_lo :: Settings -> (String, [Option])
=====================================
compiler/GHC/Settings/IO.hs
=====================================
@@ -115,6 +115,8 @@ initSettings top_dir = do
windres_path <- getToolSetting "windres command"
libtool_path <- getToolSetting "libtool command"
ar_path <- getToolSetting "ar command"
+ otool_path <- getToolSetting "otool command"
+ install_name_tool_path <- getToolSetting "install_name_tool command"
ranlib_path <- getToolSetting "ranlib command"
-- TODO this side-effect doesn't belong here. Reading and parsing the settings
@@ -191,6 +193,8 @@ initSettings top_dir = do
, toolSettings_pgm_windres = windres_path
, toolSettings_pgm_libtool = libtool_path
, toolSettings_pgm_ar = ar_path
+ , toolSettings_pgm_otool = otool_path
+ , toolSettings_pgm_install_name_tool = install_name_tool_path
, toolSettings_pgm_ranlib = ranlib_path
, toolSettings_pgm_lo = (lo_prog,[])
, toolSettings_pgm_lc = (lc_prog,[])
=====================================
compiler/GHC/SysTools.hs
=====================================
@@ -259,7 +259,10 @@ linkDynLib dflags0 o_files dep_packages
| ( osElfTarget (platformOS (targetPlatform dflags)) ||
osMachOTarget (platformOS (targetPlatform dflags)) ) &&
dynLibLoader dflags == SystemDependent &&
- WayDyn `Set.member` ways dflags
+ -- Only if we want dynamic libraries
+ WayDyn `Set.member` ways dflags &&
+ -- Only use RPath if we explicitly asked for it
+ gopt Opt_RPath dflags
= ["-L" ++ l, "-Xlinker", "-rpath", "-Xlinker", l]
-- See Note [-Xlinker -rpath vs -Wl,-rpath]
| otherwise = ["-L" ++ l]
@@ -384,8 +387,13 @@ linkDynLib dflags0 o_files dep_packages
++ map Option pkg_lib_path_opts
++ map Option pkg_link_opts
++ map Option pkg_framework_opts
- ++ [ Option "-Wl,-dead_strip_dylibs" ]
+ -- dead_strip_dylibs, will remove unused dylibs, and thus save
+ -- space in the load commands. The -headerpad is necessary so
+ -- that we can inject more @rpath's later for the left over
+ -- libraries in the runInjectRpaths phase below.
+ ++ [ Option "-Wl,-dead_strip_dylibs", Option "-Wl,-headerpad,8000" ]
)
+ runInjectRPaths dflags pkg_lib_paths output_fn
_ -> do
-------------------------------------------------------------------
-- Making a DSO
=====================================
compiler/GHC/SysTools/Tasks.hs
=====================================
@@ -28,6 +28,10 @@ import GHC.CmmToLlvm.Base (LlvmVersion, llvmVersionStr, supportedLlvmVersion, pa
import GHC.SysTools.Process
import GHC.SysTools.Info
+import Control.Monad (join, forM, filterM)
+import System.Directory (doesFileExist)
+import System.FilePath ((</>))
+
{-
************************************************************************
* *
@@ -237,6 +241,32 @@ figureLlvmVersion dflags = traceToolCommand dflags "llc" $ do
return Nothing)
+-- | On macOS we rely on the linkers @-dead_strip_dylibs@ flag to remove unused
+-- libraries from the dynamic library. We do this to reduce the number of load
+-- commands that end up in the dylib, and has been limited to 32K (32768) since
+-- macOS Sierra (10.14).
+--
+-- @-dead_strip_dylibs@ does not dead strip @-rpath@ entries, as such passing
+-- @-l@ and @-rpath@ to the linker will result in the unnecesasry libraries not
+-- being included int he load commands, however the @-rpath@ entries are all
+-- forced to be included. This can lead to 100s of @-rpath@ entries being
+-- included when only a handful of liraries end up being turely linked.
+--
+-- Thus after building the library, we run a fixup phase where we inject the
+-- @-rpath@ for each found library (in the given library search paths) into the
+-- dynamic library through @-add_rpath at .
+runInjectRPaths :: DynFlags -> [FilePath] -> FilePath -> IO ()
+runInjectRPaths dflags lib_paths dylib = do
+ info <- lines <$> askOtool dflags Nothing [Option "-L", Option dylib]
+ -- filter the output for only the libraries. And then drop the @rpath prefix.
+ let libs = fmap (drop 7) $ filter (isPrefixOf "@rpath") $ fmap (head.words) $ info
+ rpaths <- nub.sort.join <$> forM libs (\f -> filterM (\l -> doesFileExist (l </> f)) lib_paths)
+ -- inject the rpaths
+ case rpaths of
+ [] -> return ()
+ _ -> runInstallNameTool dflags $ map Option $ "-add_rpath":(intersperse "-add_rpath" rpaths) ++ [dylib]
+
+
runLink :: DynFlags -> [Option] -> IO ()
runLink dflags args = traceToolCommand dflags "linker" $ do
-- See Note [Run-time linker info]
@@ -329,6 +359,17 @@ runAr dflags cwd args = traceToolCommand dflags "ar" $ do
let ar = pgm_ar dflags
runSomethingFiltered dflags id "Ar" ar args cwd Nothing
+askOtool :: DynFlags -> Maybe FilePath -> [Option] -> IO String
+askOtool dflags mb_cwd args = do
+ let otool = pgm_otool dflags
+ runSomethingWith dflags "otool" otool args $ \real_args ->
+ readCreateProcessWithExitCode' (proc otool real_args){ cwd = mb_cwd }
+
+runInstallNameTool :: DynFlags -> [Option] -> IO ()
+runInstallNameTool dflags args = do
+ let tool = pgm_install_name_tool dflags
+ runSomethingFiltered dflags id "Install Name Tool" tool args Nothing Nothing
+
runRanlib :: DynFlags -> [Option] -> IO ()
runRanlib dflags args = traceToolCommand dflags "ranlib" $ do
let ranlib = pgm_ranlib dflags
=====================================
configure.ac
=====================================
@@ -697,6 +697,18 @@ else
fi
AC_SUBST([LibtoolCmd])
+dnl ** Which otool to use on macOS
+dnl --------------------------------------------------------------
+AC_CHECK_TARGET_TOOL([OTOOL], [otool])
+OtoolCmd="$OTOOL"
+AC_SUBST(OtoolCmd)
+
+dnl ** Which install_name_tool to use on macOS
+dnl --------------------------------------------------------------
+AC_CHECK_TARGET_TOOL([INSTALL_NAME_TOOL], [install_name_tool])
+InstallNameToolCmd="$INSTALL_NAME_TOOL"
+AC_SUBST(InstallNameToolCmd)
+
# Here is where we re-target which specific version of the LLVM
# tools we are looking for. In the past, GHC supported a number of
# versions of LLVM simultaneously, but that stopped working around
@@ -1520,6 +1532,8 @@ echo "\
libtool : $LibtoolCmd
objdump : $ObjdumpCmd
ranlib : $RanlibCmd
+ otool : $OtoolCmd
+ install_name_tool : $InstallNameToolCmd
windres : $WindresCmd
dllwrap : $DllWrapCmd
genlib : $GenlibCmd
=====================================
docs/users_guide/phases.rst
=====================================
@@ -95,6 +95,24 @@ given compilation phase:
Use ⟨cmd⟩ as the pre-processor (with :ghc-flag:`-F` only).
+.. ghc-flag:: -pgmotool ⟨cmd⟩
+ :shortdesc: Use ⟨cmd⟩ as the program to inspect mach-o dylibs on macOS
+ :type: dynamic
+ :category: phase-programs
+
+ Use ⟨cmd⟩ as the program to inspect mach-o dynamic libraries and
+ executables to read the dynamic library dependencies. We will compute
+ the necessary ``runpath``s to bembed for the dependencies based on the
+ result of the ``otool`` call.
+
+.. ghc-flag:: -pgminstall_name_tool ⟨cmd⟩
+ :shortdesc: Use ⟨cmd⟩ as the program to inject ``runpath`` into mach-o dylibs on macOS
+ :type: dynamic
+ :category: phase-programs
+
+ Use ⟨cmd⟩ as the program to inject ``runpath``s into mach-o dynamic
+ libraries and executables. As detected by the ``otool`` call.
+
.. ghc-flag:: -pgmwindres ⟨cmd⟩
:shortdesc: Use ⟨cmd⟩ as the program for embedding manifests on Windows.
:type: dynamic
=====================================
hadrian/cfg/system.config.in
=====================================
@@ -151,6 +151,8 @@ settings-merge-objects-command = @SettingsMergeObjectsCommand@
settings-merge-objects-flags = @SettingsMergeObjectsFlags@
settings-ar-command = @SettingsArCommand@
settings-ranlib-command = @SettingsRanlibCommand@
+settings-otool-command = @SettingsOtoolCommand@
+settings-install_name_tool-command = @SettingsInstallNameToolCommand@
settings-dll-wrap-command = @SettingsDllWrapCommand@
settings-windres-command = @SettingsWindresCommand@
settings-libtool-command = @SettingsLibtoolCommand@
=====================================
hadrian/src/Oracles/Setting.hs
=====================================
@@ -114,6 +114,8 @@ data SettingsFileSetting
| SettingsFileSetting_MergeObjectsFlags
| SettingsFileSetting_ArCommand
| SettingsFileSetting_RanlibCommand
+ | SettingsFileSetting_OtoolCommand
+ | SettingsFileSetting_InstallNameToolCommand
| SettingsFileSetting_DllWrapCommand
| SettingsFileSetting_WindresCommand
| SettingsFileSetting_LibtoolCommand
@@ -200,6 +202,8 @@ settingsFileSetting key = lookupValueOrError configFile $ case key of
SettingsFileSetting_MergeObjectsFlags -> "settings-merge-objects-flags"
SettingsFileSetting_ArCommand -> "settings-ar-command"
SettingsFileSetting_RanlibCommand -> "settings-ranlib-command"
+ SettingsFileSetting_OtoolCommand -> "settings-otool-command"
+ SettingsFileSetting_InstallNameToolCommand -> "settings-install_name_tool-command"
SettingsFileSetting_DllWrapCommand -> "settings-dll-wrap-command"
SettingsFileSetting_WindresCommand -> "settings-windres-command"
SettingsFileSetting_LibtoolCommand -> "settings-libtool-command"
=====================================
hadrian/src/Rules/Generate.hs
=====================================
@@ -308,6 +308,8 @@ generateSettings = do
, ("ar flags", expr $ lookupValueOrError configFile "ar-args")
, ("ar supports at file", expr $ yesNo <$> flag ArSupportsAtFile)
, ("ranlib command", expr $ settingsFileSetting SettingsFileSetting_RanlibCommand)
+ , ("otool command", expr $ settingsFileSetting SettingsFileSetting_OtoolCommand)
+ , ("install_name_tool command", expr $ settingsFileSetting SettingsFileSetting_InstallNameToolCommand)
, ("touch command", expr $ settingsFileSetting SettingsFileSetting_TouchCommand)
, ("dllwrap command", expr $ settingsFileSetting SettingsFileSetting_DllWrapCommand)
, ("windres command", expr $ settingsFileSetting SettingsFileSetting_WindresCommand)
=====================================
includes/ghc.mk
=====================================
@@ -233,6 +233,8 @@ $(includes_SETTINGS) : includes/Makefile | $$(dir $$@)/.
@echo ',("ar flags", "$(ArArgs)")' >> $@
@echo ',("ar supports at file", "$(ArSupportsAtFile)")' >> $@
@echo ',("ranlib command", "$(SettingsRanlibCommand)")' >> $@
+ @echo ',("otool command", "$(SettingsOtoolCommand)")' >> $@
+ @echo ',("install_name_tool command", "$(SettingsInstallNameToolCommand)")' >> $@
@echo ',("touch command", "$(SettingsTouchCommand)")' >> $@
@echo ',("dllwrap command", "$(SettingsDllWrapCommand)")' >> $@
@echo ',("windres command", "$(SettingsWindresCommand)")' >> $@
=====================================
mk/config.mk.in
=====================================
@@ -504,6 +504,8 @@ SettingsLdFlags = @SettingsLdFlags@
SettingsMergeObjectsCommand = @SettingsMergeObjectsCommand@
SettingsMergeObjectsFlags = @SettingsMergeObjectsFlags@
SettingsArCommand = @SettingsArCommand@
+SettingsOtoolCommand = @SettingsOtoolCommand@
+SettingsInstallNameToolCommand = @SettingsInstallNameToolCommand@
SettingsRanlibCommand = @SettingsRanlibCommand@
SettingsDllWrapCommand = @SettingsDllWrapCommand@
SettingsWindresCommand = @SettingsWindresCommand@
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/3bb2834d22ed6607e3398005d34d019af0246cfa
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/3bb2834d22ed6607e3398005d34d019af0246cfa
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