[PATCH] Makefile: Add '+' to QUIET_SUBDIR0 to fix parallel make.

Signed-off-by: Fernando J. Pereda <redacted>
---

  I don't know if this breaks non-gnu make, and don't have an easy way
  to test it right now. So someone should do that before it is applied.

  This is needed for GNU make to let sub-makes connect to the jobserver
  when multiple jobs are specified (-j option to make). It was not
  needed before 74f2b2a8d006a49e1be7e30731c2f7365d2741d1 because of how
  GNU make works.

  - ferdy

 Makefile |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/Makefile b/Makefile
index ad321b3..090ea98 100644
--- a/Makefile
+++ b/Makefile

@@ -657,7 +657,7 @@ ifndef V
 	QUIET_LINK     = @echo '   ' LINK $@;
 	QUIET_BUILT_IN = @echo '   ' BUILTIN $@;
 	QUIET_GEN      = @echo '   ' GEN $@;
-	QUIET_SUBDIR0  = @subdir=
+	QUIET_SUBDIR0  = +@subdir=
 	QUIET_SUBDIR1  = ;$(NO_SUBDIR) echo '   ' SUBDIR $$subdir; \
 			 $(MAKE) $(PRINT_DIR) -C $$subdir
 	export V

-- 
1.5.1