X-Git-Url: http://git.linex4red.de/pub/lufa.git/blobdiff_plain/11fa17a7dbef79cab68f697ac587ff64d490ee2b..5b089fbbf3bd429b2b729b5945e39b82c4160a29:/LUFA/Build/lufa_build.mk diff --git a/LUFA/Build/lufa_build.mk b/LUFA/Build/lufa_build.mk index 04596c51b..6baed1b2d 100644 --- a/LUFA/Build/lufa_build.mk +++ b/LUFA/Build/lufa_build.mk @@ -1,6 +1,6 @@ # # LUFA Library -# Copyright (C) Dean Camera, 2012. +# Copyright (C) Dean Camera, 2013. # # dean [at] fourwalledcubicle [dot] com # www.lufa-lib.org @@ -9,9 +9,9 @@ LUFA_BUILD_MODULES += BUILD LUFA_BUILD_TARGETS += size symbol-sizes all lib elf hex lss clean mostlyclean LUFA_BUILD_MANDATORY_VARS += TARGET ARCH MCU SRC F_USB LUFA_PATH -LUFA_BUILD_OPTIONAL_VARS += BOARD OPTIMIZATION C_STANDARD CPP_STANDARD F_CPU C_FLAGS CPP_FLAGS ASM_FLAGS CC_FLAGS LD_FLAGS OBJDIR OBJECT_FILES DEBUG_TYPE DEBUG_LEVEL -LUFA_BUILD_PROVIDED_VARS += -LUFA_BUILD_PROVIDED_MACROS += +LUFA_BUILD_OPTIONAL_VARS += BOARD 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 +LUFA_BUILD_PROVIDED_VARS += +LUFA_BUILD_PROVIDED_MACROS += # ----------------------------------------------------------------------------- # LUFA GCC Compiler Buildsystem Makefile Module. @@ -60,6 +60,9 @@ LUFA_BUILD_PROVIDED_MACROS += # CC_FLAGS - Common flags to pass to the C/C++ compiler and # assembler # LD_FLAGS - Flags to pass to the linker +# LINKER_RELAXATIONS - Enable or disable linker relaxations to +# decrease binary size (note: can cause link +# failures on systems with an unpatched binutils) # OBJDIR - Directory for the output object and dependency # files; if equal to ".", the output files will # be generated in the same folder as the sources @@ -86,19 +89,20 @@ ERROR_IF_EMPTY ?= $(if $(strip $($(strip $(1)))), , $(error Makefile $(strip $ ERROR_IF_NONBOOL ?= $(if $(filter Y N, $($(strip $(1)))), , $(error Makefile $(strip $(1)) option must be Y or N)) # Default values of optionally user-supplied variables -BOARD ?= NONE -OPTIMIZATION ?= s -F_CPU ?= -C_STANDARD ?= gnu99 -CPP_STANDARD ?= gnu++98 -C_FLAGS ?= -CPP_FLAGS ?= -ASM_FLAGS ?= -CC_FLAGS ?= -OBJDIR ?= . -OBJECT_FILES ?= -DEBUG_FORMAT ?= dwarf-2 -DEBUG_LEVEL ?= 2 +BOARD ?= NONE +OPTIMIZATION ?= s +F_CPU ?= +C_STANDARD ?= gnu99 +CPP_STANDARD ?= gnu++98 +C_FLAGS ?= +CPP_FLAGS ?= +ASM_FLAGS ?= +CC_FLAGS ?= +OBJDIR ?= . +OBJECT_FILES ?= +DEBUG_FORMAT ?= dwarf-2 +DEBUG_LEVEL ?= 2 +LINKER_RELAXATIONS ?= Y # Sanity check user supplied values $(foreach MANDATORY_VAR, $(LUFA_BUILD_MANDATORY_VARS), $(call ERROR_IF_UNSET, $(MANDATORY_VAR))) @@ -114,6 +118,7 @@ $(call ERROR_IF_EMPTY, CPP_STANDARD) $(call ERROR_IF_EMPTY, OBJDIR) $(call ERROR_IF_EMPTY, DEBUG_FORMAT) $(call ERROR_IF_EMPTY, DEBUG_LEVEL) +$(call ERROR_IF_NONBOOL, LINKER_RELAXATIONS) # Determine the utility prefix to use for the selected architecture ifeq ($(ARCH), AVR8) @@ -158,14 +163,14 @@ OBJECT_FILES += $(addsuffix .o, $(basename $(SRC))) ifneq ($(OBJDIR),.) # Prefix all the object filenames with the output object file directory path OBJECT_FILES := $(addprefix $(patsubst %/,%,$(OBJDIR))/, $(notdir $(OBJECT_FILES))) - + # Check if any object file (without path) appears more than once in the object file list ifneq ($(words $(sort $(OBJECT_FILES))), $(words $(OBJECT_FILES))) $(error Cannot build with OBJDIR parameter set - one or more object file name is not unique) endif # Create the output object file directory if it does not exist and add it to the virtual path list - $(shell mkdir $(OBJDIR) 2> /dev/null) + $(shell mkdir $(OBJDIR) 2> /dev/null) VPATH += $(dir $(SRC)) endif @@ -194,7 +199,10 @@ BASE_CPP_FLAGS := -x c++ -O$(OPTIMIZATION) -std=$(CPP_STANDARD) BASE_ASM_FLAGS := -x assembler-with-cpp # Create a list of flags to pass to the linker -BASE_LD_FLAGS := -lm -Wl,-Map=$(TARGET).map,--cref -Wl,--gc-sections -Wl,--relax +BASE_LD_FLAGS := -lm -Wl,-Map=$(TARGET).map,--cref -Wl,--gc-sections +ifeq ($(LINKER_RELAXATIONS), Y) + BASE_LD_FLAGS += -Wl,--relax +endif ifeq ($(ARCH), AVR8) BASE_LD_FLAGS += -mmcu=$(MCU) else ifeq ($(ARCH), XMEGA) @@ -215,7 +223,7 @@ build_begin: @echo $(MSG_INFO_MESSAGE) Begin compilation of project \"$(TARGET)\"... @echo "" @$(CROSS)-gcc --version - + # Post-build informational target, to project name information when building has completed build_end: @echo $(MSG_INFO_MESSAGE) Finished building project \"$(TARGET)\". @@ -231,7 +239,7 @@ symbol-sizes: $(TARGET).elf @echo $(MSG_NM_CMD) Extracting \"$<\" symbols with decimal byte sizes $(CROSS)-nm --size-sort --demangle --radix=d $< -# Cleans intermediatary build files, leaving only the compiled application files +# Cleans intermediary build files, leaving only the compiled application files mostlyclean: @echo $(MSG_REMOVE_CMD) Removing object files of \"$(TARGET)\" rm -f $(OBJECT_FILES) @@ -277,7 +285,7 @@ $(OBJDIR)/%.o: %.c $(MAKEFILE_LIST) $(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 $@ - + # 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 $<)\" @@ -296,7 +304,7 @@ $(OBJDIR)/%.o: %.S $(MAKEFILE_LIST) .SECONDARY : %.elf %.elf: $(OBJECT_FILES) @echo $(MSG_LINK_CMD) Linking object files into \"$@\" - $(CROSS)-gcc $(BASE_LD_FLAGS) $(LD_FLAGS) $^ -o $@ + $(CROSS)-gcc $^ -o $@ $(BASE_LD_FLAGS) $(LD_FLAGS) # Extracts out the loadable FLASH memory data from the project ELF file, and creates an Intel HEX format file of it %.hex: %.elf