Cmakeを使用したlibusbのリンクに関する問題

Question

私は2つのプログラムを一緒にハックしようとしていて、そのうちの1つ（openTLD）はcmakeを使用しています。私はこの問題を読んでいて、ちょっとした作業をしていましたが、それを並べ替えることはできません。

私が「ハッキング」したオブジェクト（libusbに依存している）を持っていると、コンパイル時にcppオブジェクトのインスタンスが生成されないところでコンパイルするとエラーになることがあります。

マイCMakeLists（追加でdelimetedビット**またはCAPS）

#Set minimum version requered 
cmake_minimum_required(VERSION 2.4.6) 
#just to avoid the warning 
if(COMMAND cmake_policy) 
cmake_policy(SET CMP0003 NEW) 
endif(COMMAND cmake_policy) 
#set project name 
project(TLD) 
#Append path to the module path 
list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}) 
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/../cmake/Modules/") 
#OpenCV 
find_package(OpenCV REQUIRED) 

#** ADDED ** 
find_package(libusb-1.0 REQUIRED) 

#set the default path for built executables to the "bin" directory 
set(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/../bin) 
#set the default path for built libraries to the "lib" directory 
set(LIBRARY_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/../lib) 
#set the include directories **CHANGED** added libusb 
include_directories (${PROJECT_SOURCE_DIR}/../include ${LIBUSB_1_INCLUDE_DIRS}    ${OpenCV_INCLUDE_DIRS}) 

#** ADDED ** 
SET(CMAKE_CXX_FLAGS "-lusb-1.0") 

#libraries 
add_library(tld_utils tld_utils.cpp) 
add_library(LKTracker LKTracker.cpp) 
add_library(ferNN FerNNClassifier.cpp) 
add_library(tld TLD.cpp) 

# **CHANGED** THIS CLASS COMPILES 
add_library(servo servo.cpp) 

#executables 
# ** WHEN I TRY TO ISTANTIATE 'SERVO' IN 'tld.cpp' THAT IS ISTANTIATED THIS CLASS I GET  PROBLEMS 
add_executable(run_tld run_tld.cpp) 

#link the libraries **CHANGED** added servo and libusb 
target_link_libraries(run_tld tld LKTracker ferNN tld_utils servo ${libusb-1.0__LIBS}  ${OpenCV_LIBS}) 
#set optimization level 
set(CMAKE_BUILD_TYPE Release) 

端子からの出力は次のとおりです。

それで問題（私がそこにある包み

lewis@lewis-desktop:~/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/build$ cmake ../src/ 
-- The C compiler identification is GNU 
-- The CXX compiler identification is GNU 
-- Check for working C compiler: /usr/bin/gcc 
-- Check for working C compiler: /usr/bin/gcc -- works 
-- Detecting C compiler ABI info 
-- Detecting C compiler ABI info - done 
-- Check for working CXX compiler: /usr/bin/c++ 
-- Check for working CXX compiler: /usr/bin/c++ -- works 
-- Detecting CXX compiler ABI info 
-- Detecting CXX compiler ABI info - done 
-- Found libusb-1.0: 
-- - Includes: /usr/include/libusb-1.0 
-- - Libraries: /usr/lib/x86_64-linux-gnu/libusb-1.0.so 
-- Configuring done 
-- Generating done 
-- Build files have been written to: /home/lewis/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/build 
lewis@lewis-desktop:~/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/build$ make 
Scanning dependencies of target LKTracker 
[ 16%] Building CXX object CMakeFiles/LKTracker.dir/LKTracker.o 
Linking CXX static library /home/lewis/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/lib/libLKTracker.a 
[ 16%] Built target LKTracker 
Scanning dependencies of target ferNN 
[ 33%] Building CXX object CMakeFiles/ferNN.dir/FerNNClassifier.o 
Linking CXX static library /home/lewis/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/lib/libferNN.a 
[ 33%] Built target ferNN 
Scanning dependencies of target tld_utils 
[ 50%] Building CXX object CMakeFiles/tld_utils.dir/tld_utils.o 
Linking CXX static library /home/lewis/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/lib/libtld_utils.a 
[ 50%] Built target tld_utils 
Scanning dependencies of target servo 
[ 66%] Building CXX object CMakeFiles/servo.dir/servo.o 
Linking CXX static library /home/lewis/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/lib/libservo.a 
[ 66%] Built target servo 
Scanning dependencies of target tld 
[ 83%] Building CXX object CMakeFiles/tld.dir/TLD.o 
Linking CXX static library /home/lewis/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/lib/libtld.a 
[ 83%] Built target tld 
Scanning dependencies of target run_tld 
[100%] Building CXX object CMakeFiles/run_tld.dir/run_tld.o 
Linking CXX executable /home/lewis/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/bin/run_tld 
/home/lewis/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/lib/libservo.a(servo.o): In function `servo::servo()': 
servo.cpp:(.text+0xa): undefined reference to `libusb_init' 
servo.cpp:(.text+0x1b): undefined reference to `libusb_get_device_list' 
/home/lewis/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/lib/libservo.a(servo.o): In function `servo::deviceMatchesVendorProduct(libusb_device*, unsigned short, unsigned short)': 
servo.cpp:(.text+0x49): undefined reference to `libusb_get_device_descriptor' 
/home/lewis/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/lib/libservo.a(servo.o): In function `servo::setTarget(int)': 
servo.cpp:(.text+0xc1): undefined reference to `libusb_get_device_descriptor' 
servo.cpp:(.text+0xe3): undefined reference to `libusb_get_device_descriptor' 
servo.cpp:(.text+0x105): undefined reference to `libusb_get_device_descriptor' 
servo.cpp:(.text+0x143): undefined reference to `libusb_get_device_descriptor' 
servo.cpp:(.text+0x170): undefined reference to `libusb_open' 
servo.cpp:(.text+0x19c): undefined reference to `libusb_control_transfer' 
servo.cpp:(.text+0x1a6): undefined reference to `libusb_close' 
servo.cpp:(.text+0x1c2): undefined reference to `libusb_free_device_list' 
servo.cpp:(.text+0x1ce): undefined reference to `libusb_exit' 
collect2: ld returned 1 exit status 
make[2]: *** [/home/lewis/Desktop/mcleanlewis-OPENTLD_blackbox-ce389c3/bin/run_tld] Error 1 
make[1]: *** [CMakeFiles/run_tld.dir/all] Error 2 
make: *** [all] Error 2 

マイservo.cppファイル「どのような援助やポインタのため

#include <iostream> 
#include <libusb-1.0/libusb.h> 
#include "protocol.h" 
#include "servo.h" 


using namespace std; 

int count=0; 
const unsigned short vendorId = 0x1ffb; 
    unsigned short productIDArray[]={0x0089, 0x008a, 0x008b, 0x008c}; 
    libusb_context *ctx=0; 
    libusb_device **device_list=0; 

servo::servo(){ 
    libusb_init(&ctx); 
    count=libusb_get_device_list(ctx, &device_list); 
} 

bool servo::deviceMatchesVendorProduct(libusb_device *device, unsigned short idVendor, unsigned short idProduct) 
{ 
    libusb_device_descriptor desc; 
    libusb_get_device_descriptor(device, &desc); 
    return idVendor == desc.idVendor && idProduct == desc.idProduct; 
} 

void servo::setTarget(int position) 
{ 
    for(int i=0;i<count;i++) 
    { 
     libusb_device *device=device_list[i]; 
     { 
      for(int Id=0;Id<4;Id++) 
      { 
       if(deviceMatchesVendorProduct(device, vendorId, productIDArray[Id])) 
       { 
        libusb_device_handle *device_handle; 
        libusb_open(device, &device_handle); 
        libusb_control_transfer(device_handle, 0x40, REQUEST_SET_TARGET, position*4, 0, 0, 0, (ushort)5000); 
        libusb_close(device_handle); 
        break; 
       } 
      } 
     } 
    } 
    libusb_free_device_list(device_list, 0); 
    libusb_exit(ctx); 
} 

おかげで）CPPプログラマではないMと、それは一緒にハッキングされています。

Answer 1

実際これはリンカエラーです。 libusb-1.0ライブラリに間違った変数があるようです。あなたのtarget_link_librariesコマンドを変更してみてください：あなたはおそらくもtarget_link_librariesコマンドによって処理されますので、リンク、SET(CMAKE_CXX_FLAGS "-lusb-1.0")を削除する必要があります

target_link_libraries(run_tld tld LKTracker ferNN tld_utils servo ${LIBUSB_1_LIBRARIES} ${OpenCV_LIBS}) 

。