diff options
Diffstat (limited to 'LUFA/Build/DMBS/DMBS/gcc.mk')
| -rw-r--r-- | LUFA/Build/DMBS/DMBS/gcc.mk | 32 |
1 files changed, 20 insertions, 12 deletions
diff --git a/LUFA/Build/DMBS/DMBS/gcc.mk b/LUFA/Build/DMBS/DMBS/gcc.mk index 6126cf97f..73065dcec 100644 --- a/LUFA/Build/DMBS/DMBS/gcc.mk +++ b/LUFA/Build/DMBS/DMBS/gcc.mk @@ -9,15 +9,15 @@ DMBS_BUILD_MODULES += GCC DMBS_BUILD_TARGETS += size symbol-sizes all lib elf bin hex lss clean mostlyclean DMBS_BUILD_MANDATORY_VARS += TARGET ARCH MCU SRC -DMBS_BUILD_OPTIONAL_VARS += COMPILER_PATH OPTIMIZATION C_STANDARD CPP_STANDARD F_CPU C_FLAGS CPP_FLAGS ASM_FLAGS CC_FLAGS LD_FLAGS OBJDIR OBJECT_FILES DEBUG_TYPE DEBUG_LEVEL LINKER_RELAXATIONS JUMP_TABLES +DMBS_BUILD_OPTIONAL_VARS += COMPILER_PATH OPTIMIZATION C_STANDARD CPP_STANDARD F_CPU C_FLAGS +DMBS_BUILD_OPTIONAL_VARS += CPP_FLAGS ASM_FLAGS CC_FLAGS LD_FLAGS OBJDIR OBJECT_FILES DEBUG_TYPE +DMBS_BUILD_OPTIONAL_VARS += DEBUG_LEVEL LINKER_RELAXATIONS JUMP_TABLES LTO DMBS_BUILD_PROVIDED_VARS += DMBS_BUILD_PROVIDED_MACROS += -# Conditionally import the CORE module of DMBS if it is not already imported +# Import the CORE module of DMBS DMBS_MODULE_PATH := $(patsubst %/,%,$(dir $(lastword $(MAKEFILE_LIST)))) -ifeq ($(findstring CORE, $(DMBS_BUILD_MODULES)),) - include $(DMBS_MODULE_PATH)/core.mk -endif +include $(DMBS_MODULE_PATH)/core.mk # Default values of optionally user-supplied variables COMPILER_PATH ?= @@ -35,6 +35,7 @@ DEBUG_FORMAT ?= dwarf-2 DEBUG_LEVEL ?= 2 LINKER_RELAXATIONS ?= Y JUMP_TABLES ?= N +LTO ?= N # Sanity check user supplied values $(foreach MANDATORY_VAR, $(DMBS_BUILD_MANDATORY_VARS), $(call ERROR_IF_UNSET, $(MANDATORY_VAR))) @@ -49,6 +50,7 @@ $(call ERROR_IF_EMPTY, DEBUG_FORMAT) $(call ERROR_IF_EMPTY, DEBUG_LEVEL) $(call ERROR_IF_NONBOOL, LINKER_RELAXATIONS) $(call ERROR_IF_NONBOOL, JUMP_TABLES) +$(call ERROR_IF_NONBOOL, LTO) # Determine the utility prefix to use for the selected architecture ifeq ($(ARCH), AVR8) @@ -108,7 +110,8 @@ DEPENDENCY_FILES := $(OBJECT_FILES:%.o=%.d) # Create a list of common flags to pass to the compiler/linker/assembler BASE_CC_FLAGS := -pipe -g$(DEBUG_FORMAT) -g$(DEBUG_LEVEL) ifneq ($(findstring $(ARCH), AVR8 XMEGA),) - BASE_CC_FLAGS += -mmcu=$(MCU) -fshort-enums -fno-inline-small-functions -fpack-struct + BASE_C_FLAGS += -fpack-struct + BASE_CC_FLAGS += -mmcu=$(MCU) -fshort-enums -fno-inline-small-functions else ifneq ($(findstring $(ARCH), UC3),) BASE_CC_FLAGS += -mpart=$(MCU:at32%=%) -masm-addr-pseudos endif @@ -128,10 +131,15 @@ ifeq ($(JUMP_TABLES), N) # in a pseudo-random jump target. BASE_CC_FLAGS += -fno-jump-tables endif +ifeq ($(LTO), Y) + # Enable link time optimization to reduce overall flash size. + BASE_CC_FLAGS += -flto -fuse-linker-plugin + BASE_LD_FLAGS += -flto -fuse-linker-plugin +endif # Additional language specific compiler flags BASE_C_FLAGS := -x c -O$(OPTIMIZATION) -std=$(C_STANDARD) -Wstrict-prototypes -BASE_CPP_FLAGS := -x c++ -O$(OPTIMIZATION) -std=$(CPP_STANDARD) +BASE_CPP_FLAGS := -x c++ -O$(OPTIMIZATION) -std=$(CPP_STANDARD) -fno-exceptions -fno-threadsafe-statics BASE_ASM_FLAGS := -x assembler-with-cpp # Create a list of flags to pass to the linker @@ -204,27 +212,27 @@ $(SRC): # Compiles an input C source file and generates an assembly listing for it %.s: %.c $(MAKEFILE_LIST) @echo $(MSG_COMPILE_CMD) Generating assembly from C file \"$(notdir $<)\" - $(CROSS)-gcc -S $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) $< -o $@ + $(CROSS)-gcc -S $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) $($(notdir $<)_FLAGS) $< -o $@ # Compiles an input C++ source file and generates an assembly listing for it %.s: %.cpp $(MAKEFILE_LIST) @echo $(MSG_COMPILE_CMD) Generating assembly from C++ file \"$(notdir $<)\" - $(CROSS)-gcc -S $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) $< -o $@ + $(CROSS)-gcc -S $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) $($(notdir $<)_FLAGS) $< -o $@ # Compiles an input C source file and generates a linkable object file for it $(OBJDIR)/%.o: %.c $(MAKEFILE_LIST) @echo $(MSG_COMPILE_CMD) Compiling C file \"$(notdir $<)\" - $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@ + $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) $($(notdir $<)_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@ # Compiles an input C++ source file and generates a linkable object file for it $(OBJDIR)/%.o: %.cpp $(MAKEFILE_LIST) @echo $(MSG_COMPILE_CMD) Compiling C++ file \"$(notdir $<)\" - $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@ + $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) $($(notdir $<)_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@ # Assembles an input ASM source file and generates a linkable object file for it $(OBJDIR)/%.o: %.S $(MAKEFILE_LIST) @echo $(MSG_ASSEMBLE_CMD) Assembling \"$(notdir $<)\" - $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_ASM_FLAGS) $(CC_FLAGS) $(ASM_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@ + $(CROSS)-gcc -c $(BASE_CC_FLAGS) $(BASE_ASM_FLAGS) $(CC_FLAGS) $(ASM_FLAGS) $($(notdir $<)_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@ # Generates a library archive file from the user application, which can be linked into other applications .PRECIOUS : $(OBJECT_FILES) |