I need some help with setting up my libusb library. I know that to use a library in c++ (without an IDE) I have to include the header and link the library. I do not know if the issue is that the libusb version is 32bit and not 64, or if I have an issue linking the library. I'm new to this so roast me if I'm barking up the wrong tree. I just want USB serial access for a c++ program. I've also read that the 32 vs 64 bit thing is about matching your application, not your OS. That makes me more confused because I do not have an application, I have a single source file in a single folder. I would love to continue this project but I cannot seem to get past this.
I cannot use visual studio for the project. (any good free c++ IDEs for enterprise use?)
Context:
Mac OSX Catalina 10.15.4
I'm trying to link the library libusb
Main working folder: Robot
Path to lib: Robot/Dependencies/libusb/lib/
Path to include: Robot/Dependencies/libusb/include/
inside the folder there are these files:
libusb-1.0.0.dylib, libusb-1.0.dylib, libusb-1.0.a, pckgconfig
Please help me:
- statically link this library
- dynaimcally link this library
- OR find a workaround
here is the thing I'm trying to run. There is nothing wrong with it (it was copied and pasted, only the #include is modified), the problem is library linking (I think):
#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;
}
Here are some of my faliures:
- naive try to build:
$ 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)
- try to link:
$ 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)
- sorta build and then link:
$ 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)
with -framework foundation:
$ 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_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)
"_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)
any help would be immensly appreciated. The commands that I tried are from stack overflow already.
