[patch] Enable parallel make check also from gdb/

[Jan Kratochvil <jan dot kratochvil at redhat dot com>]

Hi,

fix for:
RFC: parallelize "make check", Tom Tromey
http://sourceware.org/ml/gdb-patches/2009-06/threads.html#00660

which works from gdb/testsuite/ but not from gdb/ for running:
	make check//unix/-m32
	etc.

TARGET_FLAGS_TO_PASS the patch modifies only for `make check',
not for `make check//unix...'.


Thanks,
Jan


gdb/
2009-06-30  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* Makefile.in (TARGET_FLAGS_TO_PASS): Include also FORCE_PARALLEL.
	(check//%): Construct FORCE_PARALLEL for the sub-make.  Extend the
	comment for it.

--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -620,7 +620,8 @@ TARGET_FLAGS_TO_PASS = \
 	"MAKEINFO=$(MAKEINFO)" \
 	"MAKEHTML=$(MAKEHTML)" \
 	"RUNTEST=$(RUNTEST)" \
-	"RUNTESTFLAGS=$(RUNTESTFLAGS)"
+	"RUNTESTFLAGS=$(RUNTESTFLAGS)" \
+	"FORCE_PARALLEL=$(FORCE_PARALLEL)"
 
 # All source files that go into linking GDB.
 # Links made at configuration time should not be specified here, since
@@ -885,7 +886,8 @@ check: force
 # will run 3 concurrent sessions of check, eventually testing all 10
 # combinations.  GNU make is required for the % pattern to work, as is
 # a shell that expands alternations within braces.  If GNU make is not
-# used, this rule will harmlessly fail to match.
+# used, this rule will harmlessly fail to match.  Used FORCE_PARALLEL to
+# prevent serialized checking due to the passed RUNTESTFLAGS.
 check//%: force
 	@if [ -f testsuite/config.status ]; then \
 	  rootme=`pwd`; export rootme; \
@@ -905,6 +907,7 @@ check//%: force
 	  else :; fi && cd $$testdir && \
 	  $(MAKE) $(TARGET_FLAGS_TO_PASS) \
 	    RUNTESTFLAGS="--target_board=$$variant $(RUNTESTFLAGS)" \
+	    FORCE_PARALLEL=$(if $(FORCE_PARALLEL),1,$(if $(RUNTESTFLAGS),,1)) \
 	    "$$target"; \
 	else true; fi