Build ar archives with -L when "joining" objects

Since there may be .o files which are in fact archives.

8 files changed, 14 insertions, 1 deletions

diff --git a/compiler/GHC/Driver/Pipeline/Execute.hs b/compiler/GHC/Driver/Pipeline/Execute.hs
index 902ef68f3a..8a185bf4ec 100644
--- a/compiler/GHC/Driver/Pipeline/Execute.hs
+++ b/compiler/GHC/Driver/Pipeline/Execute.hs
@@ -1179,8 +1179,10 @@ joinObjectFiles hsc_env o_files output_fn
 
   | otherwise = do
   withAtomicRename output_fn $ \tmp_ar ->
-      liftIO $ runAr logger dflags Nothing $ map Option $ ["rc", tmp_ar] ++ o_files
+      liftIO $ runAr logger dflags Nothing $ map Option $ ["qc" ++ dashL, tmp_ar] ++ o_files
   where
+    dashLSupported = sArSupportsDashL (settings dflags)
+    dashL = if dashLSupported then "L" else ""
     can_merge_objs = isJust (pgm_lm (hsc_dflags hsc_env))
     dflags = hsc_dflags hsc_env
     tmpfs = hsc_tmpfs hsc_env
diff --git a/compiler/GHC/Settings.hs b/compiler/GHC/Settings.hs
index 2014a437ca..92bfa75699 100644
--- a/compiler/GHC/Settings.hs
+++ b/compiler/GHC/Settings.hs
@@ -23,6 +23,7 @@ module GHC.Settings
   , sLdIsGnuLd
   , sGccSupportsNoPie
   , sUseInplaceMinGW
+  , sArSupportsDashL
   , sPgm_L
   , sPgm_P
   , sPgm_F
@@ -91,6 +92,7 @@ data ToolSettings = ToolSettings
   , toolSettings_ldIsGnuLd               :: Bool
   , toolSettings_ccSupportsNoPie         :: Bool
   , toolSettings_useInplaceMinGW         :: Bool
+  , toolSettings_arSupportsDashL         :: Bool
 
   -- commands for particular phases
   , toolSettings_pgm_L       :: String
@@ -197,6 +199,8 @@ sGccSupportsNoPie :: Settings -> Bool
 sGccSupportsNoPie = toolSettings_ccSupportsNoPie . sToolSettings
 sUseInplaceMinGW :: Settings -> Bool
 sUseInplaceMinGW = toolSettings_useInplaceMinGW . sToolSettings
+sArSupportsDashL :: Settings -> Bool
+sArSupportsDashL = toolSettings_arSupportsDashL . sToolSettings
 
 sPgm_L :: Settings -> String
 sPgm_L = toolSettings_pgm_L . sToolSettings
diff --git a/compiler/GHC/Settings/IO.hs b/compiler/GHC/Settings/IO.hs
index 08e60776a3..8e23706410 100644
--- a/compiler/GHC/Settings/IO.hs
+++ b/compiler/GHC/Settings/IO.hs
@@ -96,6 +96,7 @@ initSettings top_dir = do
   ldSupportsBuildId       <- getBooleanSetting "ld supports build-id"
   ldSupportsFilelist      <- getBooleanSetting "ld supports filelist"
   ldIsGnuLd               <- getBooleanSetting "ld is GNU ld"
+  arSupportsDashL         <- getBooleanSetting "ar supports -L"
 
   let globalpkgdb_path = installed "package.conf.d"
       ghc_usage_msg_path  = installed "ghc-usage.txt"
@@ -167,6 +168,7 @@ initSettings top_dir = do
       , toolSettings_ldIsGnuLd               = ldIsGnuLd
       , toolSettings_ccSupportsNoPie         = gccSupportsNoPie
       , toolSettings_useInplaceMinGW         = useInplaceMinGW
+      , toolSettings_arSupportsDashL         = arSupportsDashL
 
       , toolSettings_pgm_L   = unlit_path
       , toolSettings_pgm_P   = (cpp_prog, cpp_args)
diff --git a/distrib/configure.ac.in b/distrib/configure.ac.in
index 6f9237cb32..d5b99cbb8a 100644
--- a/distrib/configure.ac.in
+++ b/distrib/configure.ac.in
@@ -228,6 +228,7 @@ AC_SUBST(TargetWordBigEndian)
 dnl ** how to invoke `ar' and `ranlib'
 #
 FP_PROG_AR_SUPPORTS_ATFILE
+FP_PROG_AR_SUPPORTS_DASH_L
 FP_PROG_AR_NEEDS_RANLIB
 RanlibCmd="$RANLIB"
 AC_SUBST([RanlibCmd])
diff --git a/hadrian/bindist/Makefile b/hadrian/bindist/Makefile
index e9b1ce1cf7..bac7011a84 100644
--- a/hadrian/bindist/Makefile
+++ b/hadrian/bindist/Makefile
@@ -121,6 +121,7 @@ lib/settings :
 	@echo ',("ar command", "$(SettingsArCommand)")' >> $@
 	@echo ',("ar flags", "$(ArArgs)")' >> $@
 	@echo ',("ar supports at file", "$(ArSupportsAtFile)")' >> $@
+	@echo ',("ar supports -L", "$(ArSupportsDashL)")' >> $@
 	@echo ',("ranlib command", "$(SettingsRanlibCommand)")' >> $@
 	@echo ',("otool command", "$(SettingsOtoolCommand)")' >> $@
 	@echo ',("install_name_tool command", "$(SettingsInstallNameToolCommand)")' >> $@
diff --git a/hadrian/src/Rules/Generate.hs b/hadrian/src/Rules/Generate.hs
index 9350b1b2ca..db220a98c4 100644
--- a/hadrian/src/Rules/Generate.hs
+++ b/hadrian/src/Rules/Generate.hs
@@ -311,6 +311,7 @@ generateSettings = do
         , ("ar command", expr $ settingsFileSetting SettingsFileSetting_ArCommand)
         , ("ar flags", expr $ lookupSystemConfig "ar-args")
         , ("ar supports at file", expr $ yesNo <$> flag ArSupportsAtFile)
+        , ("ar supports -L", expr $ yesNo <$> flag ArSupportsDashL)
         , ("ranlib command", expr $ settingsFileSetting SettingsFileSetting_RanlibCommand)
         , ("otool command", expr $ settingsFileSetting SettingsFileSetting_OtoolCommand)
         , ("install_name_tool command", expr $ settingsFileSetting SettingsFileSetting_InstallNameToolCommand)
diff --git a/mk/config.mk.in b/mk/config.mk.in
index 1559e98ea3..06e1dabd96 100644
--- a/mk/config.mk.in
+++ b/mk/config.mk.in
@@ -682,6 +682,7 @@ endif
 AR			= @ArCmd@
 AR_OPTS			= @ArArgs@
 ArSupportsAtFile = @ArSupportsAtFile@
+ArSupportsDashL  = @ArSupportsDashL@
 
 AR_STAGE0 = @AR_STAGE0@
 AR_STAGE1 = $(AR)
diff --git a/rts/include/ghc.mk b/rts/include/ghc.mk
index 2fc14d5bef..f5a198bcdd 100644
--- a/rts/include/ghc.mk
+++ b/rts/include/ghc.mk
@@ -209,6 +209,7 @@ $(includes_SETTINGS) : rts/include/Makefile | $$(dir $$@)/.
 	@echo ',("ar command", "$(SettingsArCommand)")' >> $@
 	@echo ',("ar flags", "$(ArArgs)")' >> $@
 	@echo ',("ar supports at file", "$(ArSupportsAtFile)")' >> $@
+	@echo ',("ar supports -L", "$(ArSupportsDashL)")' >> $@
 	@echo ',("ranlib command", "$(SettingsRanlibCommand)")' >> $@
 	@echo ',("otool command", "$(SettingsOtoolCommand)")' >> $@
 	@echo ',("install_name_tool command", "$(SettingsInstallNameToolCommand)")' >> $@