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[PATCH v2 1/2] cxl: fix build for GCC 4.6.x

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GCC 4.6.3 does not support -Wno-unused-const-variable. Instead, use the
kbuild infrastructure that checks if this options exists.

Fixes: 2cd55c68c0a4 ("cxl: Fix build failure due to -Wunused-variable behaviour change")
Suggested-by: Michal Marek <mmarek@suse.com>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---
v2: don't remove -Werror

 drivers/misc/cxl/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/cxl/Makefile b/drivers/misc/cxl/Makefile
index 6982f603fadc..ab6f392d3504 100644
--- a/drivers/misc/cxl/Makefile
+++ b/drivers/misc/cxl/Makefile
@@ -1,4 +1,4 @@
-ccflags-y := -Werror -Wno-unused-const-variable
+ccflags-y := -Werror $(call cc-disable-warning, unused-const-variable)
 
 cxl-y				+= main.o file.o irq.o fault.o native.o
 cxl-y				+= context.o sysfs.o debugfs.o pci.o trace.o
-- 
2.6.0.rc2.230.g3dd15c0

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[PATCH v2 1/2] cxl: fix build for GCC 4.6.x Brian Norris <computersforpeace@gmail.com> - 2016-01-08 19:40 +0100
  [PATCH v2 2/2] cxl: use -Werror only with CONFIG_PPC_WERROR Brian Norris <computersforpeace@gmail.com> - 2016-01-08 19:40 +0100
    Re: [v2,2/2] cxl: use -Werror only with CONFIG_PPC_WERROR Michael Ellerman <mpe@ellerman.id.au> - 2016-01-12 13:40 +0100
  Re: [v2,1/2] cxl: fix build for GCC 4.6.x Michael Ellerman <mpe@ellerman.id.au> - 2016-01-12 13:40 +0100

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