[xen staging] x86/build: move -fno-asynchronous-unwind-tables into EMBEDDED_EXTRA_CFLAGS

[patchbot@xxxxxxx]

commit 1a47731115c2c8eb510e135fa48ed51ad2e94a26
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Wed May 13 13:06:28 2020 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed May 13 20:33:42 2020 +0100

    x86/build: move -fno-asynchronous-unwind-tables into EMBEDDED_EXTRA_CFLAGS
    
    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 <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 Config.mk                            | 2 +-
 tools/tests/x86_emulator/testcase.mk | 2 +-
 xen/arch/x86/arch.mk                 | 2 +-
 xen/arch/x86/boot/build32.mk         | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/Config.mk b/Config.mk
index 3621162ae4..b0f16680f3 100644
--- a/Config.mk
+++ b/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
diff --git a/tools/tests/x86_emulator/testcase.mk 
b/tools/tests/x86_emulator/testcase.mk
index a565d15524..dafeb6caf7 100644
--- a/tools/tests/x86_emulator/testcase.mk
+++ b/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
diff --git a/xen/arch/x86/arch.mk b/xen/arch/x86/arch.mk
index 2a51553edb..62b7c97007 100644
--- a/xen/arch/x86/arch.mk
+++ b/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.
diff --git a/xen/arch/x86/boot/build32.mk b/xen/arch/x86/boot/build32.mk
index 48c7407c00..5851ebff5f 100644
--- a/xen/arch/x86/boot/build32.mk
+++ b/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)) 
 
--
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