[Xen-changelog] [xen-unstable] xen: Add -Wno-unused-value to the clang CFLAGS

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Tim Deegan <tim@xxxxxxx>
# Date 1334146233 -3600
# Node ID ee4c7012ff63cf6a53af4052e893d98217449f87
# Parent  5bbda657a0160d3eec024bef2e7a59f199e84b10
xen: Add -Wno-unused-value to the clang CFLAGS

clang complains about a lot of functions and macros whose return value
is unused.  I started on patches to drop some functions' return values
and scatter (void)s around callers, but it was getting too messy.
Just turn off the warning instead.

Signed-off-by: Tim Deegan <tim@xxxxxxx>
Acked-by: Keir Fraser <keir@xxxxxxx>
Committed-by: Tim Deegan <tim@xxxxxxx>
---


diff -r 5bbda657a016 -r ee4c7012ff63 Config.mk
--- a/Config.mk Tue Apr 10 10:42:35 2012 +0100
+++ b/Config.mk Wed Apr 11 13:10:33 2012 +0100
@@ -159,7 +159,8 @@ CFLAGS += -Wall -Wstrict-prototypes
 
 # Clang complains about macros that expand to 'if ( ( foo == bar ) ) ...'
 # and is over-zealous with the printf format lint
-CFLAGS-$(clang) += -Wno-parentheses -Wno-format
+# and is a bit too fierce about unused return values
+CFLAGS-$(clang) += -Wno-parentheses -Wno-format -Wno-unused-value
 
 $(call cc-option-add,HOSTCFLAGS,HOSTCC,-Wdeclaration-after-statement)
 $(call cc-option-add,CFLAGS,CC,-Wdeclaration-after-statement)

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