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Add LINKER_RELAXATIONS option to the LUFA BUILD build system module.

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This commit is contained in:
Dean Camera 2012-09-30 14:01:30 +00:00
parent 4cd80263ff
commit 4641acc691
3 changed files with 32 additions and 15 deletions
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38
LUFA/Build/lufa_build.mk
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@ -9,7 +9,7 @@
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_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 +=
@ -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)
@ -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)