[PATCH] acpica: add -fno-strict-aliasing to ignore type punning warnings (LP: #971886)

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

We don't have much control over the quality of code in the ACPICA core that
is incorporated into fwts.  When compiled on Gentoo there are a bunch of
"dereferencing type-punned pointer will break strict-aliasing rules" warnings
which we can't easily fix.  For now, just use -fno-strict-aliasing on the
ACPICA core to workaround this noise.

Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 src/acpica/Makefile.am                 |    2 +-
 src/acpica/source/compiler/Makefile.am |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/acpica/Makefile.am b/src/acpica/Makefile.am
index 6a7b4b5..5a475e9 100644
--- a/src/acpica/Makefile.am
+++ b/src/acpica/Makefile.am
@@ -11,7 +11,7 @@ ACPICA_COMP =   $(ACPICA_SRC)/components
 #
 # -DACPI_EXEC_APP is specific to making ACPICA for the fwts method test
 #
-AM_CPPFLAGS =  -D_LINUX -DNDEBUG -D_CONSOLE -DACPI_EXEC_APP -I$(top_srcdir)/src/lib/include -I$(ACPICA_SRC)/include -Wall
+AM_CPPFLAGS =  -D_LINUX -DNDEBUG -D_CONSOLE -DACPI_EXEC_APP -I$(top_srcdir)/src/lib/include -I$(ACPICA_SRC)/include -Wall -fno-strict-aliasing
 
 osunixxf_munged.c: $(ACPICA_OSL)/osunixxf.c
 	cat  $(ACPICA_OSL)/osunixxf.c | \
diff --git a/src/acpica/source/compiler/Makefile.am b/src/acpica/source/compiler/Makefile.am
index 91db20b..74ae927 100644
--- a/src/acpica/source/compiler/Makefile.am
+++ b/src/acpica/source/compiler/Makefile.am
@@ -2,7 +2,7 @@
 # We need to build this as a seperate shared library with the iasl functionality built in. We
 # just export the fwts_* interface.
 #
-AM_CPPFLAGS = -Wall -Wstrict-prototypes -D_LINUX -DACPI_ASL_COMPILER $(CFLAGS) -I$(top_srcdir)/src/acpica/source/include
+AM_CPPFLAGS = -Wall -Wstrict-prototypes -fno-strict-aliasing -D_LINUX -DACPI_ASL_COMPILER $(CFLAGS) -I$(top_srcdir)/src/acpica/source/include
 
 ACPICA_COMPILER     = .
 ACPICA_COMMON       = ../common
-- 
1.7.9.5