linux-kernel - [PATCH 1/6] kbuild: mergeconfig: fix "jobserver unavailable" warning

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Message-Id: <1426227703-31815-2-git-send-email-yamada.masahiro@socionext.com>
Date:	Fri, 13 Mar 2015 15:21:38 +0900
From:	Masahiro Yamada <yamada.masahiro@...ionext.com>
To:	linux-kbuild@...r.kernel.org
Cc:	Josh Boyer <jwboyer@...hat.com>,
	Darren Hart <dvhart@...ux.intel.com>,
	john stultz <johnstul@...ibm.com>,
	Michal Marek <mmarek@...e.cz>,
	Josh Triplett <josh@...htriplett.org>,
	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	linux-kernel@...r.kernel.org,
	"Yann E. MORIN" <yann.morin.1998@...e.fr>
Subject: [PATCH 1/6] kbuild: mergeconfig: fix "jobserver unavailable" warning

If "make kvmconfig" is run with "-j" option, a warning message,
"jobserver unavailable: using -j1.  Add `+' to parent make rule.",
is displayed.

  $ make -s defconfig
  *** Default configuration is based on 'x86_64_defconfig'
  #
  # configuration written to .config
  #
  $ make -j8 kvmconfig
  Using ./.config as base
  Merging ./arch/x86/configs/kvm_guest.config
    [ snip ]
  #
  # merged configuration written to ./.config (needs make)
  #
  make[2]: warning: jobserver unavailable: using -j1.  Add `+' to
  parent make rule.
  scripts/kconfig/conf --oldconfig Kconfig
    [ snip ]
  #
  # configuration written to .config
  #

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 scripts/kconfig/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 9645c07..fc34f46 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -110,7 +110,7 @@ define mergeconfig
 $(if $(wildcard $(objtree)/.config),, $(error You need an existing .config for this target))
 $(if $(call configfiles,$(1)),, $(error No configuration exists for this target on this architecture))
 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh -m -O $(objtree) $(objtree)/.config $(call configfiles,$(1))
-$(Q)yes "" | $(MAKE) -f $(srctree)/Makefile oldconfig
++$(Q)yes "" | $(MAKE) -f $(srctree)/Makefile oldconfig
 endef
 
 PHONY += kvmconfig
-- 
1.9.1

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