Cube generated Makefile with c++

[Andrew C]

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 statusMakefile:211: recipe for target 'build/CLI.elf' failedmake: *** [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# optimizationOPT = -Og######################################## paths######################################## source pathSOURCES_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 sourcesC_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/binPREFIX = arm-none-eabi-CC = $(BINPATH)/$(PREFIX)gccCXX = $(BINPATH)/$(PREFIX)g++AS = $(BINPATH)/$(PREFIX)gcc -x assembler-with-cppCP = $(BINPATH)/$(PREFIX)objcopyAR = $(BINPATH)/$(PREFIX)arSZ = $(BINPATH)/$(PREFIX)sizeHEX = $(CP) -O ihexBIN = $(CP) -O binary -S ######################################## CFLAGS######################################## cpuCPU = -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 definesAS_DEFS =

# C defines

C_DEFS = \-DUSE_HAL_DRIVER \-DSTM32F446xx# AS includesAS_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 flagsASFLAGS = $(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-2endif

CXXFLAGS += $(CFLAGS)

CXXFLAGS += -fabi-version=0CXXFLAGS += -fno-rttiCXXFLAGS += -fno-exceptionsCXXFLAGS += -fno-use-cxa-atexitCXXFLAGS += -fno-threadsafe-statics

# C++ -- Warnings

CXXFLAGS += -Weffc++CXXFLAGS += -Wfloat-equalCXXFLAGS += -Wsign-promoCXXFLAGS += -Wzero-as-null-pointer-constantCXXFLAGS += -Wmissing-declarations CXXFLAGS += -Woverloaded-virtualCXXFLAGS += -Wsuggest-final-typesCXXFLAGS += -Wsuggest-final-methodsCXXFLAGS += -Wsuggest-overrideCXXFLAGS += -Wsuggest-attribute=pureCXXFLAGS += -Wsuggest-attribute=constCXXFLAGS += -Wsuggest-attribute=noreturnCXXFLAGS += -Wsuggest-attribute=formatCXXFLAGS += -Wmissing-format-attributeCXXFLAGS += -Wold-style-castCXXFLAGS += -WshadowCXXFLAGS += -Wuseless-castCXXFLAGS += -Wctor-dtor-privacyCXXFLAGS += -Wstrict-null-sentinel

# Generate dependency information

CFLAGS += -MMD -MP -MF'$(@:%.o=%.d)' -MT'$(@:%.o=%.d)'######################################## LDFLAGS######################################## link scriptLDSCRIPT = 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 objectsOBJECTS = $(addprefix $(BUILD_DIR)/,$(notdir $(C_SOURCES:.c=.o)))vpath %.c $(sort $(dir $(C_SOURCES)))# list of ASM program objectsOBJECTS += $(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!

[Tesla DeLorean]

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);

}