c - 我的C程序: compilation error occurs出现问题

我正在使用Yocto项目交叉编译器来编译我的C代码。

但是由于某些原因，我有编译错误。

这是我的C代码:

#include <stdio.h>
#include <stdlib.h>
#include "/home/gaston/linux4sam/poky/build-microchip/tmp/sysroots-components/cortexa5hf-neon/mraa/usr/include/mraa.hpp"

/* MRAA does not yet understand GPIO-A - GPIO-L       */
/* Linaro will add this                   */
/* What Mraa does understand is pin out numbers so,     */
/* pin 23 is GPIO-A and pin 25 is GPIO-C          */

#define LED 10
#define BUTTON 29

bool running = true;
bool led_state = false;
int last_touch;
void sig_handler(int signo)
{
    if (signo == SIGINT)
        running = false;
}

int main(int argc, char* argv[])
{
    mraa::Result ret;
    int touch;

    mraa::Gpio* touch_gpio = new mraa::Gpio(BUTTON);
    if (touch_gpio == NULL){
        return mraa::ERROR_UNSPECIFIED;
    }
    mraa::Gpio* led_gpio = new mraa::Gpio(LED);
    if (led_gpio == NULL){
        return mraa::ERROR_UNSPECIFIED;
    }

    signal(SIGINT, sig_handler);

    if ((ret = touch_gpio->dir(mraa::DIR_IN))!= mraa::SUCCESS){
        return ret;
    }
    if ((ret = led_gpio->dir(mraa::DIR_OUT))!= mraa::SUCCESS){
        return ret;
    }

    led_gpio->write(led_state);

    while (running) {
        touch = touch_gpio->read();
        if (touch == 1 && last_touch == 0) {
            led_state = !led_state;
            ret = led_gpio->write(led_state);
            usleep(100000);
        }
        last_touch = touch;
        usleep(1);
    }
    delete led_gpio;
    delete touch_gpio;
    return ret;
}

这是Makefile:

#CC=arm-poky-linux-gnueabi-gcc -march=armv7-a -marm -mfpu=neon -mfloat-abi=hard -mcpu=cortex-a5 --sysroot=/opt/poky-atmel/2.5.3/sysroots/cortexa5hf-neon-poky-linux-gnueabi
#CC="gcc"

all: last1.o
        ${CC} last1.o -o target_bin -lmraa

last1.o: last1.c
        ${CC} -I . -c last1.c

clean:
        rm -rf *.o
        rm target_bin

这就是我运行make all时得到的:

最佳答案

您正在使用C编译器编译用C++编写的代码。
只需将.c文件更改为.cpp文件，并在Unix系统上使用g++而不是gcc进行编译。