Makefile: Build with -Wno-address-of-packed-member

Building with gcc v9 causes lots of warnings about pointers to packed
variables.  However, SeaBIOS is limited to x86 where unaligned
reads/writes are supported by the cpu.  So, disable that warning.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

diff --git a/Makefile b/Makefile
index d16d1ae7a3006675b891ddfbcb893819dc9c1243..5f7d5370198abac950b24e08a7aa69e133562028 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -68,6 +68,7 @@ COMMONCFLAGS += $(call cc-option,$(CC),-fno-pie,)
 COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector,)
 COMMONCFLAGS += $(call cc-option,$(CC),-fno-stack-protector-all,)
 COMMONCFLAGS += $(call cc-option,$(CC),-fstack-check=no,)
+COMMONCFLAGS += $(call cc-option,$(CC),-Wno-address-of-packed-member,)
 COMMA := ,
 
 CFLAGS32FLAT := $(COMMONCFLAGS) -DMODE16=0 -DMODESEGMENT=0