158 lines
6.0 KiB
Makefile
158 lines
6.0 KiB
Makefile
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#-------------------------------------------------------------------------------
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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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# Generate debug information.
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# Add '-O0' at the end of this line to turn off optimizations. This can make
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# debugging (especially asm) much easier but it greatly increases the size of
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# the code and reduces performance.
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CDEBUG = -g -O0 -DDEBUG=1
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# Turns on all -O2 except size increasers.
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# Any CDEBUG settings will come after this and can be used to override.
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COMMON_FLAGS += -Os
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COMMON_FLAGS += -mno-unaligned-access
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# Turn on dead code elimination.
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COMMON_FLAGS += -fdce
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# Enables all warnings and treat them as errors except those preceded with -Wno-
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C_FLAGS_WARNINGS = -Wall -Werror -Wno-uninitialized -Wno-strict-aliasing -Wno-unused-function -fdiagnostics-show-option
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C_FLAGS_WARNINGS += -Wno-unused-but-set-variable -Wno-format
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# Turn on all warnings.
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COMMON_FLAGS += $(C_FLAGS_WARNINGS)
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# Don't use common symbols. This is usually done in kernels. Makes
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# code size slightly larger and increases performance.
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COMMON_FLAGS += -fno-common
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# Use a freestanding build environment. Standard for kernels, implies
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# std library may not exist.
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COMMON_FLAGS += -ffreestanding -fno-builtin
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# Don't ever link anything against shared libs.
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COMMON_FLAGS += -static
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# Don't link against the system std library or compiler libraries.
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# Everything we link against MUST be specified with -I/-L explicitly.
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#COMMON_FLAGS += -nostdinc -nostdlib
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# Set the C standard to C99 with GNU extensions.
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# Use traditional GNU inline function semantics.
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C99_FLAGS = -std=gnu99 -fgnu89-inline
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# Generate code specifically for ARMv7-A, cortex-ax CPU.
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# Use the ARM Procedure Call Standard.
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ARM_FLAGS = -march=armv7-a -mcpu=$(CPU) -mtune=$(CPU) -mapcs
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ifeq "$(USE_THUMB)" "1"
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# Generate thumb2 instructions (mixed 16/32-bit).
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ARM_FLAGS += -mthumb
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# Allow mixed ARM and thumb code. All C code will generate thumb instructions
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# but there is hand-written asm that requires ARM.
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ARM_FLAGS += -mthumb-interwork
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# Indicate that we're using thumb.
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ARM_FLAGS += -DUSE_THUMB
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CC_LIB_POST = thumb2
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else
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# Generate ARM-only code.
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ARM_FLAGS += -marm
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CC_LIB_POST =
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endif
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# Use NEON SIMD instructions for floating point. Alternatively can specify
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# VFP which gives IEEE 754-compliance (unlike NEON which can have errors).
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ARM_FLAGS += -mfpu=neon
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# Specify these options with NEON.
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ARM_FLAGS += -ftree-vectorize
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ARM_FLAGS += -fno-math-errno
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ARM_FLAGS += -funsafe-math-optimizations
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ARM_FLAGS += -fno-signed-zeros
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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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ARM_FLAGS += -mfloat-abi=softfp
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# Build common flags shared by C and C++.
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COMMON_FLAGS += $(ARM_FLAGS)
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# Add debug flags for debug builds.
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ifeq "$(DEBUG)" "1"
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COMMON_FLAGS += $(CDEBUG)
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endif
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# C flags. Set C99 mode.
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CFLAGS += $(COMMON_FLAGS)
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CFLAGS += $(C99_FLAGS)
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# C++ flags. Disable exceptions and RTTI.
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CXXFLAGS += $(COMMON_FLAGS)
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CXXFLAGS += -fno-exceptions -fno-rtti
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#-------------------------------------------------------------------------------
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# Include paths
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#-------------------------------------------------------------------------------
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# Link against libc and libgcc. Specify paths to libc in newlib build
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# directory. Need to specify libgcc since our linker does not link
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# against anything, even compiler libs because of -nostdlib.
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LDADD += -lm -lstdc++ -lc -lgcc
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# These include paths have to be quoted because they may contain spaces,
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# particularly under cygwin.
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LDINC += -L '$(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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-I$(SDK_ROOT)/sdk \
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-I$(SDK_ROOT)/sdk/include \
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-I$(SDK_ROOT)/sdk/include/$(TARGET) \
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-I$(SDK_ROOT)/sdk/drivers \
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-I$(SDK_ROOT)/sdk/common \
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-I$(SDK_ROOT)/sdk/core \
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-I$(SDK_ROOT)/sdk/utility \
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-I$(BOARD_ROOT) \
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-I$(SDK_ROOT)/board/$(TARGET)/common \
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-I$(SDK_ROOT)/board/common \
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-I$(LWIP_ROOT)/lwip/src/include \
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-I$(LWIP_ROOT)/lwip/src/include/ipv4 \
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-I$(LWIP_ROOT)/lwip/src/include/ipv6 \
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-I$(LWIP_ROOT)/mx6/include
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