gcc4mbed/build/gcc4mbed.mk

   1 #Copyright (C) 2011 by Sagar G V
   2 #
   3 #Permission is hereby granted, free of charge, to any person obtaining a copy
   4 #of this software and associated documentation files (the "Software"), to deal
   5 #in the Software without restriction, including without limitation the rights
   6 #to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   7 #copies of the Software, and to permit persons to whom the Software is
   8 #furnished to do so, subject to the following conditions:
   9 #
  10 #The above copyright notice and this permission notice shall be included in
  11 #all copies or substantial portions of the Software.
  12 #
  13 #THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14 #IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15 #FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16 #AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17 #LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  18 #OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  19 #THE SOFTWARE.
  20 #
  21 # Updates:
  22 #    Arthur Wolf & Adam Green in 2011 - Updated to work with mbed.
  23 ###############################################################################
  24 # USAGE:
  25 # Variables that must be defined in including makefile.
  26 #   PROJECT: Name to be given to the output binary for this project.
  27 #   SRC: The root directory for the sources of your project.
  28 #   GCC4MED_DIR: The root directory for where the gcc4mbed sources are located
  29 #                in your project.  This should point to the parent directory
  30 #                of the build directory which contains this gcc4mbed.mk file.
  31 #   LIBS_PREFIX: List of library/object files to prepend to mbed.ar capi.ar libs.
  32 #   LIBS_SUFFIX: List of library/object files to append to mbed.ar capi.ar libs.
  33 #   GCC4MBED_DELAYED_STDIO_INIT: Set to non-zero value to have intialization of
  34 #                                stdin/stdout/stderr delayed which will
  35 #                                shrink the size of the resulting binary if
  36 #                                APIs like printf(), scanf(), etc. aren't used.
  37 # Example makefile:
  38 #       PROJECT=HelloWorld
  39 #       SRC=.
  40 #       GCC4MBED_DIR=../..
  41 #       LIBS_PREFIX=../agutil/agutil.ar
  42 #       LIBS_SUFFIX=
  43 #
  44 #       include ../../build/gcc4mbed.mk
  45 #
  46 ###############################################################################
  47
  48 # Default project source to be located in current directory.
  49 ifndef SRC
  50 SRC=.
  51 endif
  52
  53 # Default the init of stdio/stdout/stderr to occur before global constructors.
  54 ifndef GCC4MBED_DELAYED_STDIO_INIT
  55 GCC4MBED_DELAYED_STDIO_INIT=0
  56 endif
  57
  58 # List of sources to be compiled/assembled
  59 CSRCS = $(wildcard $(SRC)/*.c $(SRC)/*/*.c $(SRC)/*/*/*.c $(SRC)/*/*/*/*.c $(SRC)/*/*/*/*/*.c)
  60 ASRCS =  $(wildcard $(SRC)/*.S $(SRC)/*/*.S $(SRC)/*/*/*.S $(SRC)/*/*/*/*.S $(SRC)/*/*/*/*/*.S)
  61 CPPSRCS = $(wildcard $(SRC)/*.cpp $(SRC)/*/*.cpp $(SRC)/*/*/*.cpp $(SRC)/*/*/*/*.cpp $(SRC)/*/*/*/*/*.cpp)
  62
  63 # Add in the gcc4mbed shim sources that allow mbed code build under GCC
  64 CSRCS += $(GCC4MBED_DIR)/src/gcc4mbed.c $(GCC4MBED_DIR)/src/syscalls.c
  65
  66 # List of the objects files to be compiled/assembled
  67 OBJECTS= $(CSRCS:.c=.o) $(ASRCS:.S=.o) $(CPPSRCS:.cpp=.o)
  68 LSCRIPT=$(GCC4MBED_DIR)/build/mbed.ld
  69
  70 # Location of external library and header dependencies.
  71 EXTERNAL_DIR = $(GCC4MBED_DIR)/external
  72
  73 # Include path which points to external library headers and to subdirectories of this project which contain headers.
  74 SUBDIRS = $(wildcard $(SRC)/* $(SRC)/*/* $(SRC)/*/*/* $(SRC)/*/*/*/* $(SRC)/*/*/*/*/*)
  75 PROJINCS = $(sort $(dir $(SUBDIRS)))
  76 INCDIRS += $(PROJINCS) $(EXTERNAL_DIR)/mbed $(EXTERNAL_DIR)/mbed/LPC1768 $(EXTERNAL_DIR)/FATFileSystem $(GCC4MBED_DIR)/mri
  77
  78 # DEFINEs to be used when building C/C++ code
  79 DEFINES = -DTARGET_LPC1768 -DGCC4MBED_DELAYED_STDIO_INIT=$(GCC4MBED_DELAYED_STDIO_INIT)
  80
  81 # Libraries to be linked into final binary
  82 LIBS = $(LIBS_PREFIX) $(GCC4MBED_DIR)/mri/mri.ar $(EXTERNAL_DIR)/mbed/LPC1768/mbed.ar $(EXTERNAL_DIR)/mbed/LPC1768/capi.ar $(EXTERNAL_DIR)/FATFileSystem/LPC1768/FATFileSystem.ar $(LIBS_SUFFIX)
  83
  84 # Optimization level
  85 OPTIMIZATION = 2
  86
  87 #  Compiler Options
  88 GPFLAGS = -O$(OPTIMIZATION) -gstabs+3 -mcpu=cortex-m3 -mthumb -mthumb-interwork -fshort-wchar -ffunction-sections -fdata-sections -fpromote-loop-indices -Wall -Wextra -Wimplicit -Wcast-align -Wpointer-arith -Wredundant-decls -Wshadow -Wcast-qual -Wcast-align -fno-exceptions
  89 GPFLAGS += $(patsubst %,-I%,$(INCDIRS))
  90 GPFLAGS += $(DEFINES)
  91
  92 LDFLAGS = -mcpu=cortex-m3 -mthumb -O$(OPTIMIZATION) -Wl,-Map=$(PROJECT).map,--cref,--gc-sections,--no-wchar-size-warning -T$(LSCRIPT) -L $(EXTERNAL_DIR)/gcc/LPC1768
  93
  94 ASFLAGS = $(LISTING) -mcpu=cortex-m3 -mthumb -x assembler-with-cpp
  95 ASFLAGS += $(patsubst %,-I%,$(INCDIRS))
  96
  97 #  Compiler/Assembler/Linker Paths
  98 GPP = arm-none-eabi-g++
  99 AS = arm-none-eabi-gcc
 100 LD = arm-none-eabi-g++
 101 OBJCOPY = arm-none-eabi-objcopy
 102 OBJDUMP = arm-none-eabi-objdump
 103 SIZE = arm-none-eabi-size
 104 REMOVE = rm
 105
 106 # Switch to cs-rm on Windows and make sure that cmd.exe is used as shell.
 107 ifeq "$(MAKE)" "cs-make"
 108 REMOVE = cs-rm
 109 SHELL=cmd.exe
 110 endif
 111
 112 #########################################################################
 113 .PHONY: all clean deploy
 114
 115 all:: $(PROJECT).hex $(PROJECT).bin $(PROJECT).disasm
 116
 117 $(PROJECT).bin: $(PROJECT).elf
 118         $(OBJCOPY) -O binary $(PROJECT).elf $(PROJECT).bin
 119
 120 $(PROJECT).hex: $(PROJECT).elf
 121         $(OBJCOPY) -R .stack -O ihex $(PROJECT).elf $(PROJECT).hex
 122
 123 $(PROJECT).disasm: $(PROJECT).elf
 124         $(OBJDUMP) -d $(PROJECT).elf >$(PROJECT).disasm
 125
 126 $(PROJECT).elf: $(LSCRIPT) $(OBJECTS) $(LIBS)
 127         $(LD) $(LDFLAGS) $(OBJECTS) $(LIBS) -o $(PROJECT).elf
 128         $(SIZE) $(PROJECT).elf
 129
 130 clean:
 131         $(REMOVE) -f $(OBJECTS)
 132         $(REMOVE) -f $(PROJECT).hex
 133         $(REMOVE) -f $(PROJECT).elf
 134         $(REMOVE) -f $(PROJECT).map
 135         $(REMOVE) -f $(PROJECT).bin
 136         $(REMOVE) -f $(PROJECT).disasm
 137
 138 ifdef LPC_DEPLOY
 139 DEPLOY_COMMAND = $(subst PROJECT,$(PROJECT),$(LPC_DEPLOY))
 140 deploy:
 141         $(DEPLOY_COMMAND)
 142 endif
 143
 144 #########################################################################
 145 #  Default rules to compile .c and .cpp file to .o
 146 #  and assemble .s files to .o
 147
 148 .c.o :
 149         $(GPP) $(GPFLAGS) -c $< -o $(<:.c=.o)
 150
 151 .cpp.o :
 152         $(GPP) $(GPFLAGS) -c $< -o $(<:.cpp=.o)
 153
 154 .S.o :
 155         $(AS) $(ASFLAGS) -c $< -o $(<:.S=.o)
 156
 157 #########################################################################