On Thursday 07 January 2016 10:54:06 Brian Norris wrote:
>
> I'm using a GCC 4.6.3 compiler for some compile tests, and I noticed
> that commit 2cd55c68c0a4 ("cxl: Fix build failure due to -Wunused-variable
> behaviour change") breaks my builds, because the
> -Wno-unused-const-variable doesn't exist on GCC 4.6.3.
>
> drivers/misc/cxl/base.c: At top level:
> cc1: error: unrecognized command line option "-Wno-unused-const-variable"
> [-Werror]
>
> Any thoughts on how to best fix this? I'd like not to have to scrounge
> up a new cross compiler just for build tests.
>
This should do:
diff --git a/drivers/misc/cxl/Makefile b/drivers/misc/cxl/Makefile
index 6982f603fadc..add2cc17ed91 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
Alternatively, remove the -Werror. We occasionally get people that add this
flag to a Makefile, but it tends to cause more trouble whenever a new
gcc version arrives.
Arnd
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