144 lines
5.0 KiB
Makefile
144 lines
5.0 KiB
Makefile
#-------------------------------------------------------------------------------
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# Copyright (c) 2012 Freescale Semiconductor, Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without modification,
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# are permitted provided that the following conditions are met:
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#
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# o Redistributions of source code must retain the above copyright notice, this list
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# of conditions and the following disclaimer.
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#
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# o Redistributions in binary form must reproduce the above copyright notice, this
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# list of conditions and the following disclaimer in the documentation and/or
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# other materials provided with the distribution.
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#
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# o Neither the name of Freescale Semiconductor, Inc. nor the names of its
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# contributors may be used to endorse or promote products derived from this
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# software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#-------------------------------------------------------------------------------
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#-------------------------------------------------------------------------------
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# Compiler flags
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#-------------------------------------------------------------------------------
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# Enables all warnings
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C_FLAGS_WARNINGS = -Wall
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# Turn on all warnings.
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COMMON_FLAGS += $(C_FLAGS_WARNINGS)
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# Don't use common symbols. This is usually done in kernels. Makes
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# code size slightly larger and increases performance.
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COMMON_FLAGS += -fno-common
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#Place each function or data item into its own section in the output file
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COMMON_FLAGS += -ffunction-sections -fdata-sections
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# Use a freestanding build environment. Standard for kernels, implies
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# std library may not exist.
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COMMON_FLAGS += -ffreestanding -fno-builtin
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# Set the C standard to C99 with GNU extensions.
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# Use traditional GNU inline function semantics.
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C99_FLAGS = -std=gnu99
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# Generate code specifically for cortex-mx CPU.
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# Use the ARM Procedure Call Standard.
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ARM_FLAGS = -mcpu=$(CPU) -mtune=$(CPU) -march=$(ARCH) -mapcs
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ARM_FLAGS += -mthumb
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# Use float-abi=softfp for soft floating point api with HW instructions.
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# Alternatively, float-abi=hard for hw float instructions and pass float args in float regs.
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# Here need to be modified.
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ifeq "$(CPU)" "cortex-m4"
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ifeq "$(CHOOSE_FLOAT)" "SOFT_FP"
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ARM_FLAGS += -mfloat-abi=softfp -mfpu=fpv4-sp-d16
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CC_LIB_POST := armv7e-m/softfp
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else ifeq "$(CHOOSE_FLOAT)" "HARD_FP"
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ARM_FLAGS += -mfloat-abi=hard -mfpu=fpv4-sp-d16
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CC_LIB_POST := armv7e-m/fpu
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else
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CC_LIB_POST := armv7e-m
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endif
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else ifeq "$(CPU)" "cortex-m0plus"
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CC_LIB_POST := armv6-m
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endif
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# Debug setting
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ifeq "$(DEBUG)" "1"
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COMMON_FLAGS += -O0
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COMMON_FLAGS += -g2 -gdwarf-2 -gstrict-dwarf
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DEFINES += -D_DEBUG=1
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else
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COMMON_FLAGS += -Os
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endif
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# Build common flags shared by C and C++.
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COMMON_FLAGS += $(ARM_FLAGS)
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# C flags. Set C99 mode.
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CFLAGS += $(COMMON_FLAGS) $(C99_FLAGS) -nostdinc
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# C++ flags. Disable exceptions and RTTI.
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CXXFLAGS += $(COMMON_FLAGS)
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CXXFLAGS += -fno-exceptions -fno-rtti -nostdinc -nostdinc++
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# AR flags.
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ARFLAGS := -rucs
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# AS flags.
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# LD flags.
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# Use newlib-nano. To disable it, specify USE_NANO=
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USE_NANO = --specs=nano.specs
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LDFLAGS := $(USE_NANO)
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ifndef _START
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SYSOBJ := $(LIBGCC_LDPATH)/crti.o \
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$(LIBGCC_LDPATH)/crtn.o \
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$(LIBC_LDPATH)/crt0.o
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else
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SYSOBJ :=
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endif
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LDFLAGS += $(COMMON_FLAGS) -nostartfiles -nodefaultlibs -nostdlib -Xlinker --gc-sections -Xlinker -cref -Xlinker -static -Xlinker -z -Xlinker muldefs
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#-------------------------------------------------------------------------------
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# Include paths
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#-------------------------------------------------------------------------------
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# These include paths have to be quoted because they may contain spaces,
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# particularly under cygwin.
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LDINC += -L '$(LIBGCC_LDPATH)' -L '$(LIBC_LDPATH)'
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# Indicate gcc and newlib std includes as -isystem so gcc tags and
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# treats them as system directories.
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SYSTEM_INC = \
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-isystem '$(CC_INCLUDE)' \
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-isystem '$(CC_INCLUDE_FIXED)' \
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-isystem '$(LIBC_INCLUDE)'
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INCLUDES += \
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$(SDK_ROOT)/platform \
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$(SDK_ROOT)/platform/hal \
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$(SDK_ROOT)/platform/drivers \
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$(SDK_ROOT)/platform/utilities \
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$(SDK_ROOT)/platform/CMSIS/Include \
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$(SDK_ROOT)/platform/CMSIS/Include/device \
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$(SDK_ROOT)/boards
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