Transform main c file into main c++ file

Makefile

@@ -5,13 +5,16 @@ OPT = -O0
 
 BUILD_DIR = build
 
-C_SOURCES =  \
-Core/Src/main.c \
+CC_SOURCES = \
+Core/Src/main.cc \
+
+C_SOURCES = \
 Core/Src/stm32g0xx_it.c \
 Core/Src/stm32g0xx_hal_msp.c \
 Core/Src/system_stm32g0xx.c \
 Core/Src/syscalls.c \
 Core/Src/sysmem.c \
+Core/Src/print.c \
 Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_rcc.c \
 Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal.c \
 Drivers/STM32G0xx_HAL_Driver/Src/stm32g0xx_hal_cortex.c \
@@ -37,6 +40,7 @@ Core/Startup/startup_stm32g071rbtx.s
 
 PREFIX = arm-none-eabi-
 CC = $(PREFIX)gcc
+CXX = $(PREFIX)g++
 AS = $(PREFIX)gcc -x assembler-with-cpp
 CP = $(PREFIX)objcopy
 SZ = $(PREFIX)size
@@ -81,12 +85,18 @@ LDFLAGS = $(MCU) -specs=nano.specs -T$(LDSCRIPT) $(LIBDIR) $(LIBS) -Wl,-Map=$(BU
 
 all: $(BUILD_DIR)/$(TARGET).elf $(BUILD_DIR)/$(TARGET).hex $(BUILD_DIR)/$(TARGET).bin
 
-OBJECTS = $(addprefix $(BUILD_DIR)/,$(notdir $(C_SOURCES:.c=.o)))
+OBJECTS = $(addprefix $(BUILD_DIR)/,$(notdir $(CC_SOURCES:.cc=.o)))
+vpath %.cc $(sort $(dir $(CC_SOURCES)))
+
+OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(C_SOURCES:.c=.o)))
 vpath %.c $(sort $(dir $(C_SOURCES)))
 
 OBJECTS += $(addprefix $(BUILD_DIR)/,$(notdir $(ASM_SOURCES:.s=.o)))
 vpath %.s $(sort $(dir $(ASM_SOURCES)))
 
+$(BUILD_DIR)/%.o: %.cc Makefile | $(BUILD_DIR) 
+	$(CXX) -c $(CFLAGS) -Wa,-a,-ad,-alms=$(BUILD_DIR)/$(notdir $(<:.cc=.lst)) $< -o $@
+
 $(BUILD_DIR)/%.o: %.c Makefile | $(BUILD_DIR) 
 	$(CC) -c $(CFLAGS) -Wa,-a,-ad,-alms=$(BUILD_DIR)/$(notdir $(<:.c=.lst)) $< -o $@
 
@@ -94,7 +104,8 @@ $(BUILD_DIR)/%.o: %.s Makefile | $(BUILD_DIR)
 	$(AS) -c $(CFLAGS) $< -o $@
 
 $(BUILD_DIR)/$(TARGET).elf: $(OBJECTS) Makefile
-	$(CC) $(OBJECTS) $(LDFLAGS) -o $@
+	$(CXX) $(OBJECTS) $(LDFLAGS) -o $@
+	# $(CC) $(OBJECTS) $(LDFLAGS) -o $@
 	$(SZ) $@
 
 $(BUILD_DIR)/%.hex: $(BUILD_DIR)/%.elf | $(BUILD_DIR)