Remove LD_X; it's no longer used

aclocal.m4

@@ -863,17 +863,6 @@ $2=$fp_cv_$2
 ])# FP_PROG_LD_FLAG
 
 
-# FP_PROG_LD_X
-# ------------
-# Sets the output variable LdXFlag to -x if ld supports this flag.
-# Otherwise the variable's value is empty.
-AC_DEFUN([FP_PROG_LD_X],
-[
-FP_PROG_LD_FLAG([-x],[LdXFlag])
-AC_SUBST([LdXFlag])
-])# FP_PROG_LD_X
-
-
 # FP_PROG_LD_HashSize31
 # ------------
 # Sets the output variable LdHashSize31 to --hash-size=31 if ld supports

compiler/ghc.mk

@@ -105,8 +105,6 @@ endif
 	@echo 'cLdIsGNULd            = "$(LdIsGNULd)"'                      >> $@
 	@echo 'cLdHasBuildId         :: String'                             >> $@
 	@echo 'cLdHasBuildId         = "$(LdHasBuildId)"'                   >> $@
-	@echo 'cLD_X                 :: String'                             >> $@
-	@echo 'cLD_X                 = "$(LD_X)"'                           >> $@
 	@echo 'cGHC_DRIVER_DIR       :: String'                             >> $@
 	@echo 'cGHC_DRIVER_DIR       = "$(GHC_DRIVER_DIR)"'                 >> $@
 	@echo 'cGHC_UNLIT_PGM        :: String'                             >> $@

compiler/main/DriverPipeline.hs

@@ -2107,14 +2107,6 @@ joinObjectFiles dflags o_files output_fn = do
                             SysTools.FileOption "" output_fn ]
                          ++ args)
 
-      -- Do *not* add the -x flag to ld, because we want to keep those
-      -- local symbols around for the benefit of external tools. e.g.
-      -- the 'perf report' output is much less useful if all the local
-      -- symbols have been stripped out.
-      --
-      -- ld_x_flag | null cLD_X = ""
-      --           | otherwise  = "-Wl,-x"
-
       -- suppress the generation of the .note.gnu.build-id section,
       -- which we don't need and sometimes causes ld to emit a
       -- warning:

configure.ac

@@ -831,7 +831,6 @@ dnl ** check for leading underscores in symbol names
 FP_LEADING_UNDERSCORE
 
 dnl ** check for ld, whether it has an -x option, and if it is GNU ld
-FP_PROG_LD_X
 FP_PROG_LD_IS_GNU
 FP_PROG_LD_BUILD_ID
 FP_PROG_LD_NO_COMPACT_UNWIND

mk/config.mk.in

@@ -719,11 +719,6 @@ OBJDUMP = @ObjdumpCmd@
 LLC = @LlcCmd@
 OPT = @OptCmd@
 
-# Some ld's support the -x flag and some don't, so the configure
-# script detects which we have and sets LdXFlag to "-x" or ""
-# respectively.
-LD_X			= @LdXFlag@
-
 # GNU ld supports input via a linker script, which is useful to avoid
 # overflowing command-line length limits.
 LdIsGNULd		= @LdIsGNULd@