linux-kernel - [2/8] kbuild: fix make incompatibility

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Date:	Tue, 24 Aug 2010 15:16:55 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	"Paul Smith" <psmith@....org>, Sam Ravnborg <sam@...nborg.org>,
	Thomas Backlund <tmb@...driva.org>
Subject: [2/8] kbuild: fix make incompatibility

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------
Content-Length: 1668
Lines: 58

From: Sam Ravnborg <sam@...nborg.org>

commit 31110ebbec8688c6e9597b641101afc94e1c762a upstream.

"Paul Smith" <psmith@....org> reported that we would fail
to build with a new check that may be enabled in an
upcoming version of make.

The error was:

      Makefile:442: *** mixed implicit and normal rules.  Stop.

The problem is that we did stuff like this:

config %config: ...

The solution was simple - the above was split into two with identical
prerequisites and commands.
With only three lines it was not worth to try to avoid the duplication.

Cc: "Paul Smith" <psmith@....org>
Signed-off-by: Sam Ravnborg <sam@...nborg.org>
Cc: Thomas Backlund <tmb@...driva.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 Makefile |   12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

--- a/Makefile
+++ b/Makefile
@@ -440,7 +440,11 @@ ifeq ($(config-targets),1)
 include $(srctree)/arch/$(SRCARCH)/Makefile
 export KBUILD_DEFCONFIG
 
-config %config: scripts_basic outputmakefile FORCE
+config: scripts_basic outputmakefile FORCE
+	$(Q)mkdir -p include/linux include/config
+	$(Q)$(MAKE) $(build)=scripts/kconfig $@
+
+%config: scripts_basic outputmakefile FORCE
 	$(Q)mkdir -p include/linux include/config
 	$(Q)$(MAKE) $(build)=scripts/kconfig $@
 
@@ -1602,7 +1606,11 @@ endif
 	$(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
 
 # Modules
-/ %/: prepare scripts FORCE
+/: prepare scripts FORCE
+	$(cmd_crmodverdir)
+	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
+	$(build)=$(build-dir)
+%/: prepare scripts FORCE
 	$(cmd_crmodverdir)
 	$(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
 	$(build)=$(build-dir)


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