LTO option can achieve the better image size and boot performance.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming....@intel.com>
Cc: Andrew Fish <af...@apple.com>
---
 BaseTools/Conf/tools_def.template | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/BaseTools/Conf/tools_def.template 
b/BaseTools/Conf/tools_def.template
index a22b96c..f9bd41e 100755
--- a/BaseTools/Conf/tools_def.template
+++ b/BaseTools/Conf/tools_def.template
@@ -6824,9 +6824,9 @@ RELEASE_XCODE5_*_MTOC_FLAGS = -align 0x20
 ####################
 # IA-32 definitions
 ####################
-  DEBUG_XCODE5_IA32_DLINK_FLAGS      = -arch i386 -u _$(IMAGE_ENTRY_POINT) -e 
_$(IMAGE_ENTRY_POINT) -preload -segalign 0x20  -pie -all_load -dead_strip 
-seg1addr 0x240 -read_only_relocs suppress -map 
$(DEST_DIR_DEBUG)/$(BASE_NAME).map
+  DEBUG_XCODE5_IA32_DLINK_FLAGS      = -arch i386 -u _$(IMAGE_ENTRY_POINT) -e 
_$(IMAGE_ENTRY_POINT) -preload -segalign 0x20  -pie -all_load -dead_strip 
-seg1addr 0x240 -read_only_relocs suppress -map 
$(DEST_DIR_DEBUG)/$(BASE_NAME).map -object_path_lto 
$(DEST_DIR_DEBUG)/$(BASE_NAME).lto
   NOOPT_XCODE5_IA32_DLINK_FLAGS      = -arch i386 -u _$(IMAGE_ENTRY_POINT) -e 
_$(IMAGE_ENTRY_POINT) -preload -segalign 0x20  -pie -all_load -dead_strip 
-seg1addr 0x240 -read_only_relocs suppress -map 
$(DEST_DIR_DEBUG)/$(BASE_NAME).map
-RELEASE_XCODE5_IA32_DLINK_FLAGS      = -arch i386 -u _$(IMAGE_ENTRY_POINT) -e 
_$(IMAGE_ENTRY_POINT) -preload -segalign 0x20  -pie -all_load -dead_strip 
-seg1addr 0x240 -read_only_relocs suppress -map 
$(DEST_DIR_DEBUG)/$(BASE_NAME).map
+RELEASE_XCODE5_IA32_DLINK_FLAGS      = -arch i386 -u _$(IMAGE_ENTRY_POINT) -e 
_$(IMAGE_ENTRY_POINT) -preload -segalign 0x20  -pie -all_load -dead_strip 
-seg1addr 0x240 -read_only_relocs suppress -map 
$(DEST_DIR_DEBUG)/$(BASE_NAME).map -object_path_lto 
$(DEST_DIR_DEBUG)/$(BASE_NAME).lto
 
 *_XCODE5_IA32_SLINK_FLAGS      = -static -o
   DEBUG_XCODE5_IA32_ASM_FLAGS  = -arch i386 -g
@@ -6835,16 +6835,16 @@ RELEASE_XCODE5_IA32_ASM_FLAGS  = -arch i386
       *_XCODE5_IA32_NASM_FLAGS = -f macho32
 
 
-  DEBUG_XCODE5_IA32_CC_FLAGS   = -arch i386 -c -g -Os       -Wall -Werror 
-include AutoGen.h -funsigned-char -fno-stack-protector -fno-builtin 
-fshort-wchar -fasm-blocks -mdynamic-no-pic -mno-implicit-float -mms-bitfields 
-msoft-float -Wno-unused-parameter -Wno-missing-braces 
-Wno-missing-field-initializers -Wno-tautological-compare -Wno-sign-compare 
-Wno-varargs 
-ftrap-function=undefined_behavior_has_been_optimized_away_by_clang 
$(PLATFORM_FLAGS)
-RELEASE_XCODE5_IA32_CC_FLAGS   = -arch i386 -c    -Os       -Wall -Werror 
-include AutoGen.h -funsigned-char -fno-stack-protector -fno-builtin 
-fshort-wchar -fasm-blocks -mdynamic-no-pic -mno-implicit-float -mms-bitfields 
-msoft-float -Wno-unused-parameter -Wno-missing-braces 
-Wno-missing-field-initializers -Wno-tautological-compare -Wno-sign-compare 
-Wno-varargs -Wno-unused-const-variable 
-ftrap-function=undefined_behavior_has_been_optimized_away_by_clang 
$(PLATFORM_FLAGS)
+  DEBUG_XCODE5_IA32_CC_FLAGS   = -arch i386 -c -g -Os -flto -Wall -Werror 
-include AutoGen.h -funsigned-char -fno-stack-protector -fno-builtin 
-fshort-wchar -fasm-blocks -mdynamic-no-pic -mno-implicit-float -mms-bitfields 
-msoft-float -Wno-unused-parameter -Wno-missing-braces 
-Wno-missing-field-initializers -Wno-tautological-compare -Wno-sign-compare 
-Wno-varargs 
-ftrap-function=undefined_behavior_has_been_optimized_away_by_clang 
$(PLATFORM_FLAGS)
+RELEASE_XCODE5_IA32_CC_FLAGS   = -arch i386 -c    -Os -flto -Wall -Werror 
-include AutoGen.h -funsigned-char -fno-stack-protector -fno-builtin 
-fshort-wchar -fasm-blocks -mdynamic-no-pic -mno-implicit-float -mms-bitfields 
-msoft-float -Wno-unused-parameter -Wno-missing-braces 
-Wno-missing-field-initializers -Wno-tautological-compare -Wno-sign-compare 
-Wno-varargs -Wno-unused-const-variable 
-ftrap-function=undefined_behavior_has_been_optimized_away_by_clang 
$(PLATFORM_FLAGS)
   NOOPT_XCODE5_IA32_CC_FLAGS   = -arch i386 -c -g -O0       -Wall -Werror 
-include AutoGen.h -funsigned-char -fno-stack-protector -fno-builtin 
-fshort-wchar -fasm-blocks -mdynamic-no-pic -mno-implicit-float -mms-bitfields 
-msoft-float -Wno-unused-parameter -Wno-missing-braces 
-Wno-missing-field-initializers -Wno-tautological-compare -Wno-sign-compare 
-Wno-varargs 
-ftrap-function=undefined_behavior_has_been_optimized_away_by_clang 
$(PLATFORM_FLAGS)
 
 ##################
 # X64 definitions
 ##################
-  DEBUG_XCODE5_X64_DLINK_FLAGS      = -arch x86_64 -u _$(IMAGE_ENTRY_POINT) -e 
_$(IMAGE_ENTRY_POINT) -preload -segalign 0x20  -pie -all_load -dead_strip 
-seg1addr 0x240 -map $(DEST_DIR_DEBUG)/$(BASE_NAME).map
+  DEBUG_XCODE5_X64_DLINK_FLAGS      = -arch x86_64 -u _$(IMAGE_ENTRY_POINT) -e 
_$(IMAGE_ENTRY_POINT) -preload -segalign 0x20  -pie -all_load -dead_strip 
-seg1addr 0x240 -map $(DEST_DIR_DEBUG)/$(BASE_NAME).map -object_path_lto 
$(DEST_DIR_DEBUG)/$(BASE_NAME).lto
   NOOPT_XCODE5_X64_DLINK_FLAGS      = -arch x86_64 -u _$(IMAGE_ENTRY_POINT) -e 
_$(IMAGE_ENTRY_POINT) -preload -segalign 0x20  -pie -all_load -dead_strip 
-seg1addr 0x240 -map $(DEST_DIR_DEBUG)/$(BASE_NAME).map
-RELEASE_XCODE5_X64_DLINK_FLAGS      = -arch x86_64 -u _$(IMAGE_ENTRY_POINT) -e 
_$(IMAGE_ENTRY_POINT) -preload -segalign 0x20  -pie -all_load -dead_strip 
-seg1addr 0x240 -map $(DEST_DIR_DEBUG)/$(BASE_NAME).map
+RELEASE_XCODE5_X64_DLINK_FLAGS      = -arch x86_64 -u _$(IMAGE_ENTRY_POINT) -e 
_$(IMAGE_ENTRY_POINT) -preload -segalign 0x20  -pie -all_load -dead_strip 
-seg1addr 0x240 -map $(DEST_DIR_DEBUG)/$(BASE_NAME).map -object_path_lto 
$(DEST_DIR_DEBUG)/$(BASE_NAME).lto
 
 *_XCODE5_X64_SLINK_FLAGS      = -static -o
   DEBUG_XCODE5_X64_ASM_FLAGS  = -arch x86_64 -g
@@ -6854,9 +6854,9 @@ RELEASE_XCODE5_X64_ASM_FLAGS  = -arch x86_64
 *_XCODE5_*_PP_FLAGS         = -E -x assembler-with-cpp -include 
$(DEST_DIR_DEBUG)/AutoGen.h 
 *_XCODE5_*_VFRPP_FLAGS      = -x c -E -P -DVFRCOMPILE -include 
$(DEST_DIR_DEBUG)/$(MODULE_NAME)StrDefs.h 
 
-  DEBUG_XCODE5_X64_CC_FLAGS   = -target x86_64-pc-win32-macho -c -g -Os       
-Wall -Werror -Wextra -include AutoGen.h -funsigned-char -fno-ms-extensions 
-fno-stack-protector -fno-builtin -fshort-wchar -mno-implicit-float 
-mms-bitfields -Wno-unused-parameter -Wno-missing-braces 
-Wno-missing-field-initializers -Wno-tautological-compare -Wno-sign-compare 
-Wno-varargs 
-ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -D 
NO_MSABI_VA_FUNCS $(PLATFORM_FLAGS)
+  DEBUG_XCODE5_X64_CC_FLAGS   = -target x86_64-pc-win32-macho -c -g -Os -flto 
-Wall -Werror -Wextra -include AutoGen.h -funsigned-char -fno-ms-extensions 
-fno-stack-protector -fno-builtin -fshort-wchar -mno-implicit-float 
-mms-bitfields -Wno-unused-parameter -Wno-missing-braces 
-Wno-missing-field-initializers -Wno-tautological-compare -Wno-sign-compare 
-Wno-varargs 
-ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -D 
NO_MSABI_VA_FUNCS $(PLATFORM_FLAGS)
   NOOPT_XCODE5_X64_CC_FLAGS   = -target x86_64-pc-win32-macho -c -g -O0       
-Wall -Werror -Wextra -include AutoGen.h -funsigned-char -fno-ms-extensions 
-fno-stack-protector -fno-builtin -fshort-wchar -mno-implicit-float 
-mms-bitfields -Wno-unused-parameter -Wno-missing-braces 
-Wno-missing-field-initializers -Wno-tautological-compare -Wno-sign-compare 
-Wno-varargs 
-ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -D 
NO_MSABI_VA_FUNCS $(PLATFORM_FLAGS)
-RELEASE_XCODE5_X64_CC_FLAGS   = -target x86_64-pc-win32-macho -c    -Os       
-Wall -Werror -Wextra -include AutoGen.h -funsigned-char -fno-ms-extensions 
-fno-stack-protector -fno-builtin -fshort-wchar -mno-implicit-float 
-mms-bitfields -Wno-unused-parameter -Wno-missing-braces 
-Wno-missing-field-initializers -Wno-tautological-compare -Wno-sign-compare 
-Wno-varargs -Wno-unused-const-variable 
-ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -D 
NO_MSABI_VA_FUNCS $(PLATFORM_FLAGS)
+RELEASE_XCODE5_X64_CC_FLAGS   = -target x86_64-pc-win32-macho -c    -Os -flto 
-Wall -Werror -Wextra -include AutoGen.h -funsigned-char -fno-ms-extensions 
-fno-stack-protector -fno-builtin -fshort-wchar -mno-implicit-float 
-mms-bitfields -Wno-unused-parameter -Wno-missing-braces 
-Wno-missing-field-initializers -Wno-tautological-compare -Wno-sign-compare 
-Wno-varargs -Wno-unused-const-variable 
-ftrap-function=undefined_behavior_has_been_optimized_away_by_clang -D 
NO_MSABI_VA_FUNCS $(PLATFORM_FLAGS)
 
 
####################################################################################
 #
-- 
2.10.0.windows.1

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