x86/build: move -fno-asynchronous-unwind-tables into EMBEDDED_EXTRA_C…

…FLAGS

Users of EMBEDDED_EXTRA_CFLAGS already use -fno-asynchronous-unwind-tables, or
ought to.  This shrinks the size of the rombios 32bit stubs in guest memory.

Signed-off-by: Andrew Cooper <[email protected]>
Reviewed-by: Jan Beulich <[email protected]>

Config.mk

@@ -204,7 +204,7 @@ APPEND_LDFLAGS += $(foreach i, $(APPEND_LIB), -L$(i))
 APPEND_CFLAGS += $(foreach i, $(APPEND_INCLUDES), -I$(i))
 
 EMBEDDED_EXTRA_CFLAGS := -nopie -fno-stack-protector -fno-stack-protector-all
-EMBEDDED_EXTRA_CFLAGS += -fno-exceptions
+EMBEDDED_EXTRA_CFLAGS += -fno-exceptions -fno-asynchronous-unwind-tables
 
 XEN_EXTFILES_URL ?= http://xenbits.xen.org/xen-extfiles
 # All the files at that location were downloaded from elsewhere on

tools/tests/x86_emulator/testcase.mk

@@ -4,7 +4,7 @@ include $(XEN_ROOT)/tools/Rules.mk
 
 $(call cc-options-add,CFLAGS,CC,$(EMBEDDED_EXTRA_CFLAGS))
 
-CFLAGS += -fno-builtin -fno-asynchronous-unwind-tables -g0 $($(TESTCASE)-cflags)
+CFLAGS += -fno-builtin -g0 $($(TESTCASE)-cflags)
 
 .PHONY: all
 all: $(TESTCASE).bin

xen/arch/x86/arch.mk

@@ -56,7 +56,7 @@ $(call as-option-add,CFLAGS,CC,\
 $(call as-option-add,CFLAGS,CC,\
     ".L1: .L2: .nops (.L2 - .L1)$$(comma)9",-DHAVE_AS_NOPS_DIRECTIVE)
 
-CFLAGS += -mno-red-zone -fpic -fno-asynchronous-unwind-tables
+CFLAGS += -mno-red-zone -fpic
 
 # Xen doesn't use SSE interally.  If the compiler supports it, also skip the
 # SSE setup for variadic function calls.

xen/arch/x86/boot/build32.mk

@@ -4,7 +4,7 @@ include $(XEN_ROOT)/Config.mk
 
 $(call cc-options-add,CFLAGS,CC,$(EMBEDDED_EXTRA_CFLAGS))
 
-CFLAGS += -Werror -fno-asynchronous-unwind-tables -fno-builtin -g0 -msoft-float
+CFLAGS += -Werror -fno-builtin -g0 -msoft-float
 CFLAGS += -I$(XEN_ROOT)/xen/include
 CFLAGS := $(filter-out -flto,$(CFLAGS))