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Cube generated Makefile with c++

Andrew C
Associate II
Posted on March 26, 2018 at 19:41

I am trying to use C++ with the cube generated make file. It worked nicely when everything was just C. From what I have done so far, the makefile generated from cube is C only. I added flags for C++ and separated the sources, but I now get an error that says it cannot find main.cpp (which is the while I changed to cpp).

I get this error:

build/startup_stm32f446xx.o: In function `LoopFillZerobss':

/home/andrew/Desktop/Test/CLI/startup_stm32f446xx.s:113: undefined reference to `main'

collect2: error: ld returned 1 exit status

Makefile:211: recipe for target 'build/CLI.elf' failed

make: *** [build/CLI.elf] Error 1

so I am guessing that my makefile has some issues. 

Here is my edited makefile. 

Note that I am sort of doing this blind since I only have a partial clue (or no clue) at what i am doing. Engineer by Google at its finest (or worst).

##########################################################################################################################

# File automatically-generated by tool: [projectgenerator] version: [2.27.0] date: [Fri Mar 23 15:10:04 EDT 2018]

##########################################################################################################################

# ------------------------------------------------

# Generic Makefile (based on gcc)

#

# ChangeLog :

# 2017-02-10 - Several enhancements + project update mode

# 2015-07-22 - first version

# ------------------------------------------------

######################################

# target

######################################

TARGET = CLI

######################################

# building variables

######################################

# debug build?

DEBUG = 1

# optimization

OPT = -Og

#######################################

# paths

#######################################

# source path

SOURCES_DIR = \

Drivers/CMSIS \

Drivers \

Application/User/Src \

Application/User/Src/stm32f4xx_hal_msp.c \

Application/User/Src/main.cpp \

Application/User \

Drivers/STM32F4xx_HAL_Driver \

Application \

Application/User/Src/stm32f4xx_it.c

# firmware library path

PERIFLIB_PATH =

# Build path

BUILD_DIR = build

######################################

# source

######################################

# C sources

C_SOURCES = \

Src/stm32f4xx_hal_msp.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_uart.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_dma.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pwr.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_tim_ex.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_flash_ex.c \

/Src/system_stm32f4xx.c \

Src/stm32f4xx_it.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_pwr_ex.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_cortex.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_flash.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_tim.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_gpio.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_dma_ex.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_rcc.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_rcc_ex.c \

Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_flash_ramfunc.c

CXX_SOURCES = \

Src/main.cpp

# ASM sources

ASM_SOURCES = \

startup_stm32f446xx.s

######################################

# firmware library

######################################

PERIFLIB_SOURCES =

#######################################

# binaries

#######################################

BINPATH = ~/local/gcc-arm-none-eabi-6-2017-q1-update/bin

PREFIX = arm-none-eabi-

CC = $(BINPATH)/$(PREFIX)gcc

CXX = $(BINPATH)/$(PREFIX)g++

AS = $(BINPATH)/$(PREFIX)gcc -x assembler-with-cpp

CP = $(BINPATH)/$(PREFIX)objcopy

AR = $(BINPATH)/$(PREFIX)ar

SZ = $(BINPATH)/$(PREFIX)size

HEX = $(CP) -O ihex

BIN = $(CP) -O binary -S

#######################################

# CFLAGS

#######################################

# cpu

CPU = -mcpu=cortex-m4

# fpu

FPU = -mfpu=fpv4-sp-d16

# float-abi

FLOAT-ABI = -mfloat-abi=hard

# mcu

MCU = $(CPU) -mthumb $(FPU) $(FLOAT-ABI)

# macros for gcc

# AS defines

AS_DEFS =

# C defines

C_DEFS = \

-DUSE_HAL_DRIVER \

-DSTM32F446xx

# AS includes

AS_INCLUDES =

# C includes

C_INCLUDES = \

-IInc \

-IDrivers/STM32F4xx_HAL_Driver/Inc \

-IDrivers/STM32F4xx_HAL_Driver/Inc/Legacy \

-IDrivers/CMSIS/Device/ST/STM32F4xx/Include \

-IDrivers/CMSIS/Include

# compile gcc flags

ASFLAGS = $(MCU) $(AS_DEFS) $(AS_INCLUDES) $(OPT) -Wall -fdata-sections -ffunction-sections

CFLAGS = $(MCU) $(C_DEFS) $(C_INCLUDES) $(OPT) -Wall -fdata-sections -ffunction-sections

ifeq ($(DEBUG), 1)

CFLAGS += -g -gdwarf-2

endif

CXXFLAGS += $(CFLAGS)

CXXFLAGS += -fabi-version=0

CXXFLAGS += -fno-rtti

CXXFLAGS += -fno-exceptions

CXXFLAGS += -fno-use-cxa-atexit

CXXFLAGS += -fno-threadsafe-statics

# C++ -- Warnings

CXXFLAGS += -Weffc++

CXXFLAGS += -Wfloat-equal

CXXFLAGS += -Wsign-promo

CXXFLAGS += -Wzero-as-null-pointer-constant

CXXFLAGS += -Wmissing-declarations

CXXFLAGS += -Woverloaded-virtual

CXXFLAGS += -Wsuggest-final-types

CXXFLAGS += -Wsuggest-final-methods

CXXFLAGS += -Wsuggest-override

CXXFLAGS += -Wsuggest-attribute=pure

CXXFLAGS += -Wsuggest-attribute=const

CXXFLAGS += -Wsuggest-attribute=noreturn

CXXFLAGS += -Wsuggest-attribute=format

CXXFLAGS += -Wmissing-format-attribute

CXXFLAGS += -Wold-style-cast

CXXFLAGS += -Wshadow

CXXFLAGS += -Wuseless-cast

CXXFLAGS += -Wctor-dtor-privacy

CXXFLAGS += -Wstrict-null-sentinel

# Generate dependency information

CFLAGS += -MMD -MP -MF'$(@:%.o=%.d)' -MT'$(@:%.o=%.d)'

#######################################

# LDFLAGS

#######################################

# link script

LDSCRIPT = STM32F446RETx_FLASH.ld

# libraries

LIBS = -lc -lm -lnosys

LIBDIR =

LDFLAGS = $(MCU) -specs=nano.specs -T$(LDSCRIPT) $(LIBDIR) $(LIBS) -Wl,-Map=$(BUILD_DIR)/$(TARGET).map,--cref -Wl,--gc-sections

# default action: build all

all: $(BUILD_DIR)/$(TARGET).elf $(BUILD_DIR)/$(TARGET).hex $(BUILD_DIR)/$(TARGET).bin

#######################################

# build the application

#######################################

# list of objects

OBJECTS = $(addprefix $(BUILD_DIR)/,$(notdir $(C_SOURCES:.c=.o)))

vpath %.c $(sort $(dir $(C_SOURCES)))

# list of ASM program objects

OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(ASM_SOURCES:.s=.o)))

vpath %.s $(sort $(dir $(ASM_SOURCES)))

$(BUILD_DIR)/%.o: %.c Makefile | $(BUILD_DIR)

$(CC) -c $(CFLAGS) -Wa,-a,-ad,-alms=$(BUILD_DIR)/$(notdir $(<:.c=.lst)) $< -o $@

$(BUILD_DIR)/%.o: %.s Makefile | $(BUILD_DIR)

$(AS) -c $(CFLAGS) $< -o $@

$(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile

$(CC) $(OBJECTS) $(LDFLAGS) -o $@

$(SZ) $@

$(BUILD_DIR)/%.hex: $(BUILD_DIR)/%.elf | $(BUILD_DIR)

$(HEX) $< $@

$(BUILD_DIR)/%.bin: $(BUILD_DIR)/%.elf | $(BUILD_DIR)

$(BIN) $< $@

$(BUILD_DIR):

mkdir $@

#######################################

# clean up

#######################################

clean:

-rm -fR .dep $(BUILD_DIR)

#######################################

# dependencies

#######################################

-include $(shell mkdir .dep 2>/dev/null) $(wildcard .dep/*)

# *** EOF ***

Thanks in advance!

1 REPLY 1
Posted on March 26, 2018 at 20:05

You'd need to define main() in a linkable fashion without C++ name mangling

ie

extern 'C' int main(void)

{

  // ...Your code

  while(1); // don't allow exit

   return(1);

}

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