[Xen-devel] [PATCH 1 of 7 v2] xen: Add -Wno-unused-value to the clang CFLAGS

[Tim Deegan <tim@xxxxxxx>]

# HG changeset patch
# User Tim Deegan <tim@xxxxxxx>
# Date 1333640955 -3600
# Node ID 7922a921d2034930780e41f1bc71d2c4ddb3b782
# Parent  d690c7e896a26c54a5ab85458824059de72d5cba
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>

diff -r d690c7e896a2 -r 7922a921d203 Config.mk
--- a/Config.mk Thu Apr 05 11:06:03 2012 +0100
+++ b/Config.mk Thu Apr 05 16:49:15 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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