[PATCH, testsuite]: Fix detection of -j make argument

[Uros Bizjak]

Hello!

New makes (e.g. GNU Make 4.2.1) pass -j argument in MFLAGS is a
different way. While older makes pass only "-j", newer makes pass e.g.
"-j4" when -j is specified on the command line. The detection of "-j"
make argument doesn't work in the later case.

Attached patch reworks this functionality to detect -j correctly in all cases.

gcc/ChangeLog

2016-11-22  Uros Bizjak  <ubizjak@gmail.com>

    * Makefile.in ($(lang_checks_parallelized)): Fix detection
    of -j argument.

gcc/ada/ChangeLog

2016-11-22  Uros Bizjak  <ubizjak@gmail.com>

    * gcc-interface/Make-lang.in (check-acats): Fix detection
    of -j argument.

libstdc++-v3/ChangeLog

2016-11-22  Uros Bizjak  <ubizjak@gmail.com>

    * testsuite/Makefile.am
    (check-DEJAGNU $(check_DEJAGNU_normal_targets)):Fix detection
    of -j argument.
    * testsuite/Makefile.in: Regenereate.

Patch was bootstrapped and regression tested on x86_64-linux-gnu with
"GNU Make 4.2.1" and "GNU Make 3.81". Ada was not checked, but the
change is consistent with other changes.

OK for mainline SVN and release branches?

Uros.
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diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 7ecd1e4..d1acede 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -3914,7 +3914,7 @@ check_p_subdirs=$(wordlist 1,$(check_p_count),$(wordlist 1, \
 # testsuites like objc or go.
 $(lang_checks_parallelized): check-% : site.exp
 	-rm -rf $(TESTSUITEDIR)/$*-parallel
-	@if [ "$(filter -j, $(MFLAGS))" = "-j" ]; then \
+	@if [ -n "$(filter -j%, $(MFLAGS))" ]; then \
 	  test -d $(TESTSUITEDIR) || mkdir $(TESTSUITEDIR) || true; \
 	  test -d $(TESTSUITEDIR)/$*-parallel || mkdir $(TESTSUITEDIR)/$*-parallel || true; \
 	  GCC_RUNTEST_PARALLELIZE_DIR=`${PWD_COMMAND}`/$(TESTSUITEDIR)/$(check_p_tool)-parallel ; \
diff --git a/gcc/ada/gcc-interface/Make-lang.in b/gcc/ada/gcc-interface/Make-lang.in
index b5d1f0e..eb0489b 100644
--- a/gcc/ada/gcc-interface/Make-lang.in
+++ b/gcc/ada/gcc-interface/Make-lang.in
@@ -890,7 +890,7 @@ check-acats:
 	@test -d $(ACATSDIR) || mkdir -p $(ACATSDIR); \
 	rootme=`${PWD_COMMAND}`; export rootme; \
 	EXPECT=$(EXPECT); export EXPECT; \
-	if [ -z "$(CHAPTERS)" ] && [ "$(filter -j, $(MFLAGS))" = "-j" ]; \
+	if [ -z "$(CHAPTERS)" ] && [ -n "$(filter -j%, $(MFLAGS))" ]; \
 	then \
 	  rm -rf $(ACATSDIR)-parallel; \
 	  mkdir $(ACATSDIR)-parallel; \
diff --git a/libstdc++-v3/testsuite/Makefile.am b/libstdc++-v3/testsuite/Makefile.am
index af57d0b..65848f0 100644
--- a/libstdc++-v3/testsuite/Makefile.am
+++ b/libstdc++-v3/testsuite/Makefile.am
@@ -117,7 +117,7 @@ $(check_DEJAGNU_normal_targets): check-DEJAGNUnormal%: normal%/site.exp
 check-DEJAGNU $(check_DEJAGNU_normal_targets): check-DEJAGNU%: site.exp
 	$(if $*,@)AR="$(AR)"; export AR; \
 	RANLIB="$(RANLIB)"; export RANLIB; \
-	if [ -z "$*" ] && [ "$(filter -j, $(MFLAGS))" = "-j" ]; then \
+	if [ -z "$*" ] && [ -n "$(filter -j%, $(MFLAGS))" ]; then \
 	  rm -rf normal-parallel || true; \
 	  mkdir normal-parallel; \
 	  $(MAKE) $(AM_MAKEFLAGS) $(check_DEJAGNU_normal_targets); \
diff --git a/libstdc++-v3/testsuite/Makefile.in b/libstdc++-v3/testsuite/Makefile.in
index b37758b..1cdf4b8 100644
--- a/libstdc++-v3/testsuite/Makefile.in
+++ b/libstdc++-v3/testsuite/Makefile.in
@@ -598,7 +598,7 @@ $(check_DEJAGNU_normal_targets): check-DEJAGNUnormal%: normal%/site.exp
 check-DEJAGNU $(check_DEJAGNU_normal_targets): check-DEJAGNU%: site.exp
 	$(if $*,@)AR="$(AR)"; export AR; \
 	RANLIB="$(RANLIB)"; export RANLIB; \
-	if [ -z "$*" ] && [ "$(filter -j, $(MFLAGS))" = "-j" ]; then \
+	if [ -z "$*" ] && [ -n "$(filter -j%, $(MFLAGS))" ]; then \
 	  rm -rf normal-parallel || true; \
 	  mkdir normal-parallel; \
 	  $(MAKE) $(AM_MAKEFLAGS) $(check_DEJAGNU_normal_targets); \