diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 233f62bd7d3..2431b0c3872 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2010-10-12  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+	PR testsuite/45974
+	Revert:
+	* Makefile.in ($(lang_checks_parallel))
+	($(lang_checks_parallelized)): Use single quotes for
+	$(RUNTESTFLAGS), to allow passing quoted content.
+
 2010-10-11  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	* config/pa/linux-atomic.c (__sync_val_compare_and_swap_4): Return
diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 0dc8214947e..84057890dce 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -4890,7 +4890,7 @@ $(lang_checks_parallel): site.exp
 	variant=`echo "$@" | sed 's,^[^/]*//,,'`; \
 	vardots=`echo "$$variant" | sed 's,/,.,g'`; \
 	$(MAKE) TESTSUITEDIR="testsuite.$$vardots" \
-	  RUNTESTFLAGS="--target_board=$$variant "'$(RUNTESTFLAGS)' \
+	  RUNTESTFLAGS="--target_board=$$variant $(RUNTESTFLAGS)" \
 	  "$$target"
 
 TESTSUITEDIR = testsuite
@@ -4949,9 +4949,9 @@ check_p_subdirs=$(wordlist 1,$(words $(check_$*_parallelize)),$(check_p_numbers)
 # to lang_checks_parallelized variable and define check_$lang_parallelize
 # variable (see above check_gcc_parallelize description).
 $(lang_checks_parallelized): check-% : site.exp
-	@if [ -z '$(filter-out --target_board=%, $(RUNTESTFLAGS))' ] \
+	@if [ -z "$(filter-out --target_board=%, $(RUNTESTFLAGS))" ] \
 	    && [ "$(filter -j, $(MFLAGS))" = "-j" ]; then \
-	  $(MAKE) TESTSUITEDIR="$(TESTSUITEDIR)" RUNTESTFLAGS='$(RUNTESTFLAGS)' \
+	  $(MAKE) TESTSUITEDIR="$(TESTSUITEDIR)" RUNTESTFLAGS="$(RUNTESTFLAGS)" \
 	    check-parallel-$* \
 	    $(patsubst %,check-parallel-$*_%, $(check_p_subdirs)); \
 	  for file in $(TESTSUITEDIR)/$*/$* \
@@ -4968,7 +4968,7 @@ $(lang_checks_parallelized): check-% : site.exp
 	    $(patsubst %,$(TESTSUITEDIR)/$*%/$*.log.sep,$(check_p_subdirs)) \
 	    > $(TESTSUITEDIR)/$*/$*.log; \
 	else \
-	  $(MAKE) TESTSUITEDIR="$(TESTSUITEDIR)" RUNTESTFLAGS='$(RUNTESTFLAGS)' \
+	  $(MAKE) TESTSUITEDIR="$(TESTSUITEDIR)" RUNTESTFLAGS="$(RUNTESTFLAGS)" \
 	    check_$*_parallelize= check-parallel-$*; \
 	fi