libUSB，C ++，OSX，架构x86_64的未定义符号：

分类：编程问答

如何解决libUSB，C ++，OSX，架构x86_64的未定义符号：

我需要一些帮助来设置我的libusb库。我知道要在C ++中使用一个库（不带IDE），我必须包含标题和链接库。我不知道问题是否在于libusb版本是32位而不是64位，或者我在链接库时是否遇到问题。我是这个新手，如果我吠错了树，就把我烤死。 我只希望USB串行端口可以访问c ++程序。我也读过32位和64位的内容是与您的应用程序而不是操作系统匹配。这让我更加困惑，因为我没有应用程序，我在单个文件夹中只有一个源文件。我很想继续这个项目，但似乎无法超越。

我不能将Visual Studio用于该项目。 （是否有任何适用于企业的免费的免费c ++ IDE？）

上下文：

  • Mac OSX Catalina 10.15.4

  • 我正在尝试链接库libusb

  • 主工作文件夹：机械手

  • lib的路径：Robot / Dependencies / libusb / lib /

  • 包含路径：Robot / Dependencies / libusb / include /

  • 文件夹中有以下文件：

    libusb-1.0.0.dylib， libusb-1.0.dylib， libusb-1.0.a， pckgconfig

请帮助我

  • 静态链接此库
  • 动态链接此库
  • 或找到解决方法

这是我要运行的东西。它没有任何问题（已将其复制并粘贴，仅修改了#include），问题是库链接（我认为）：

#include "Dependencies/libusb/include/libusb.h"
#include <stdio.h>
using namespace std;

static void print_devs(libusb_device **devs)
{
    libusb_device *dev;
    int i = 0,j = 0;
    uint8_t path[8];
    while ((dev = devs[i++]) != NULL) {
        struct libusb_device_descriptor desc;
        int r = libusb_get_device_descriptor(dev,&desc);
        if (r < 0) {
            fprintf(stderr,"failed to get device descriptor");
            return;
        }

        printf("%04x:%04x (bus %d,device %d)",desc.idVendor,desc.idProduct,libusb_get_bus_number(dev),libusb_get_device_address(dev));

        r = libusb_get_port_numbers(dev,path,sizeof(path));
        if (r > 0) {
            printf(" path: %d",path[0]);
            for (j = 1; j < r; j++)
                printf(".%d",path[j]);
        }
        printf("\n");
    }
}

int main(void)
{
    libusb_device **devs;
    int r;
    ssize_t cnt;

    r = libusb_init(NULL);
    if (r < 0)
        return r;

    cnt = libusb_get_device_list(NULL,&devs);
    if (cnt < 0){
        libusb_exit(NULL);
        return (int) cnt;
    }

    print_devs(devs);
    libusb_free_device_list(devs,1);

    libusb_exit(NULL);
    return 0;
}

这是我的一些不幸：

  • 天真的尝试构建：
$ g++ run.cpp
Undefined symbols for architecture x86_64:
  "_libusb_exit",referenced from:
      _main in run-6f49db.o
  "_libusb_free_device_list",referenced from:
      _main in run-6f49db.o
  "_libusb_get_bus_number",referenced from:
      print_devs(libusb_device**) in run-6f49db.o
  "_libusb_get_device_address",referenced from:
      print_devs(libusb_device**) in run-6f49db.o
  "_libusb_get_device_descriptor",referenced from:
      print_devs(libusb_device**) in run-6f49db.o
  "_libusb_get_device_list",referenced from:
      _main in run-6f49db.o
  "_libusb_get_port_numbers",referenced from:
      print_devs(libusb_device**) in run-6f49db.o
  "_libusb_init",referenced from:
      _main in run-6f49db.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
  • 尝试链接：
$ g++ run.cpp -I/blah/ROBOT/Dependencies/libusb/include -L /blarg/ROBOT/Dependencies/libusb/lib 
Undefined symbols for architecture x86_64:
  "_libusb_exit",referenced from:
      _main in run-655ac8.o
  "_libusb_free_device_list",referenced from:
      _main in run-655ac8.o
  "_libusb_get_bus_number",referenced from:
      print_devs(libusb_device**) in run-655ac8.o
  "_libusb_get_device_address",referenced from:
      print_devs(libusb_device**) in run-655ac8.o
  "_libusb_get_device_descriptor",referenced from:
      print_devs(libusb_device**) in run-655ac8.o
  "_libusb_get_device_list",referenced from:
      _main in run-655ac8.o
  "_libusb_get_port_numbers",referenced from:
      print_devs(libusb_device**) in run-655ac8.o
  "_libusb_init",referenced from:
      _main in run-655ac8.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
  • 建立sorta，然后链接：
$ g++ -c run.cpp
$ g++ -o run run.o /bagh/ROBOT/Dependencies/libusb/lib/libusb-1.0.a 
Undefined symbols for architecture x86_64:
    "_CFDataGetBytes",referenced from:
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFDataGetLength",referenced from:
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFDataGetTypeID",referenced from:
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFGetTypeID",referenced from:
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _get_ioregistry_value_number in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFNumberGetTypeID",referenced from:
      _get_ioregistry_value_number in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFNumberGetValue",referenced from:
      _get_ioregistry_value_number in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFRelease",referenced from:
      _darwin_close in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_release_interface in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_kernel_driver_active in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _get_ioregistry_value_number in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFRetain",referenced from:
      _darwin_open in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFRunLoopAddSource",referenced from:
      _darwin_open in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_claim_interface in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFRunLoopGetCurrent",referenced from:
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFRunLoopRemoveSource",referenced from:
      _darwin_close in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_release_interface in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFRunLoopRun",referenced from:
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFRunLoopSourceCreate",referenced from:
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFRunLoopSourceSignal",referenced from:
      _darwin_exit in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFRunLoopStop",referenced from:
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFRunLoopWakeUp",referenced from:
      _darwin_exit in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFUUIDGetConstantUUIDWithBytes",referenced from:
      _darwin_claim_interface in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_CFUUIDGetUUIDBytes",referenced from:
      _darwin_claim_interface in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_IOCreatePlugInInterfaceForService",referenced from:
      _darwin_claim_interface in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_IOIteratorNext",referenced from:
      _darwin_init in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _process_new_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_devices_detached in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_devices_attached in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_clear_iterator in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_get_interface in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_IOKitWaitQuiet",referenced from:
      _darwin_hotplug_poll in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
  "_IONotificationPortCreate",referenced from:
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_IONotificationPortDestroy",referenced from:
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_IONotificationPortGetRunLoopSource",referenced from:
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_IOObjectRelease",referenced from:
      _darwin_init in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_claim_interface in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_kernel_driver_active in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _process_new_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_devices_detached in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      ...
    "_IORegistryEntryCreateCFProperty",referenced from:
      _darwin_kernel_driver_active in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _get_ioregistry_value_number in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_IORegistryEntryGetParentEntry",referenced from:
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_IOServiceAddMatchingNotification",referenced from:
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_IOServiceGetMatchingServices",referenced from:
      _darwin_init in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_IOServiceMatching",referenced from:
      _darwin_init in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "___CFConstantStringClassReference",referenced from:
      CFString in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      CFString in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      CFString in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      CFString in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      CFString in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      CFString in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_kCFAllocatorDefault",referenced from:
      _darwin_kernel_driver_active in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _get_ioregistry_value_number in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_kCFAllocatorSystemDefault",referenced from:
      _darwin_claim_interface in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_get_cached_device in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_kCFRunLoopCommonModes",referenced from:
      _darwin_open in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_kCFRunLoopDefaultMode",referenced from:
      _darwin_close in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_claim_interface in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_release_interface in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_kIOMasterPortDefault",referenced from:
      _darwin_init in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_hotplug_poll in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

具有-framework基础：

$ g++ -o run run.o /Users/xxandervargad/Desktop/ROBOT/Dependencies/libusb/lib/libusb-1.0.a -framework Foundation
Undefined symbols for architecture x86_64:
    "_IOCreatePlugInInterfaceForService",referenced from:
      _darwin_hotplug_poll in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_IONotificationPortCreate",referenced from:
      _darwin_init in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
    "_kIOMasterPortDefault",referenced from:
      _darwin_init in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_hotplug_poll in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
      _darwin_event_thread_main in libusb-1.0.a(libusb_1_0_la-darwin_usb.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

任何帮助将不胜感激。我尝试过的命令已经来自堆栈溢出。

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