c++ - 无法为arm-none-linux-gnueabi-g++编译器找到-lpaho-mqtt3c

Question

我在以下路径中有arm-none-linux-gnueabi-g++编译器，

root@user-VirtualBox:~# which arm-none-linux-gnueabi-g++
/home/user/octane_etk-6.0.0.240/arm-toolchain/bin/arm-none-linux-gnueabi-g++

我在paho的build命令中的DCMAKE_COMPILER路径中给出了相同的命令，

user@user-VirtualBox:~/octane_etk_sample-6.0.0.240/paho.mqtt.c$ cmake -Bbuild -H. -DPAHO_WITH_SSL=OFF -DPAHO_ENABLE_TESTING=OFF  -DCMAKE_C_COMPILER=/home/user/octane_etk-6.0.0.240/arm-toolchain/bin/arm-none-linux-gnueabi-gcc  -DCMAKE_CXX_COMPILER=/home/user/octane_etk-6.0.0.240/arm-toolchain/bin/arm-none-linux-gnueabi-g++
-- The C compiler identification is GNU 4.8.1
-- Check for working C compiler: /home/user/octane_etk-6.0.0.240/arm-toolchain/bin/arm-none-linux-gnueabi-gcc
-- Check for working C compiler: /home/user/octane_etk-6.0.0.240/arm-toolchain/bin/arm-none-linux-gnueabi-gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- CMake version: 3.10.2
-- CMake system name: Linux
-- Timestamp is 2020-04-17T07:33:49Z
-- Configuring done
-- Generating done
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_CXX_COMPILER


-- Build files have been written to: /home/user/octane_etk_sample-6.0.0.240/paho.mqtt.c/build

在完成此构建后，

$ sudo cmake --build build/ --target install
$ sudo ldconfig

并且我从“/home/user/octane_etk_sample-6.0.0.240/paho.mqtt.c/build/src/中复制了libpaho-mqtt3c.so，libpaho-mqtt3c.so.1，libpaho-mqtt3c.so.1.3.1。 ”到此“-lltkcpp_atmel”所在的文件夹。

而当我说出它时，找不到-lpaho-mqtt3c，

root@user-VirtualBox:/home/user/octane_etk_sample-6.0.0.240# make arm
mkdir -p ./bin
arm-none-linux-gnueabi-g++ \
    -Wno-write-strings \
    -Iinclude \
    speedway_embedded_example.cpp -lpaho-mqtt3c \
    -Llib \
    -static -lltkcpp_atmel -lltkcppimpinj_atmel -lxml2_atmel \
    -lssl_atmel -lcrypto_atmel -ldl_atmel \
    -o bin/speedwayr_arm
/home/user/octane_etk-6.0.0.240/arm-toolchain/bin/../lib/gcc/arm-none-linux-gnueabi/4.8.1/../../../../arm-none-linux-gnueabi/bin/ld: cannot find -lpaho-mqtt3c

如何克服这个问题？在针对arm-none-linux-gnueabi-gcc和g++构建paho时出现问题吗？

注1:
David Ranieri建议的编译器命令

root@user-VirtualBox:/home/mindlogic/octane_etk_sample-6.0.0.240# make arm
mkdir -p ./bin
arm-none-linux-gnueabi-g++ \
    -Wno-write-strings \
    -o bin/speedwayr_arm \
    -Iinclude \
    speedway_embedded_example.cpp -lpaho-mqtt3c \
    -Llib \
    -static -lltkcpp_atmel -lltkcppimpinj_atmel -lxml2_atmel \
    -lssl_atmel -lcrypto_atmel -ldl_atmel
/home/mindlogic/octane_etk-6.0.0.240/arm-toolchain/bin/../lib/gcc/arm-none-linux-gnueabi/4.8.1/../../../../arm-none-linux-gnueabi/bin/ld: cannot find -lpaho-mqtt3c

笔记2:

我已经将cmake构建从

cmake -Bbuild -H. -DPAHO_WITH_SSL=OFF -DPAHO_ENABLE_TESTING=OFF  -DCMAKE_C_COMPILER=/home/user/octane_etk-6.0.0.240/arm-toolchain/bin/arm-none-linux-gnueabi-gcc  -DCMAKE_CXX_COMPILER=/home/user/octane_etk-6.0.0.240/arm-toolchain/bin/arm-none-linux-gnueabi-g++

至

 cmake -Bbuild -H. -DPAHO_WITH_SSL=OFF -DPAHO_ENABLE_TESTING=OFF 
-DPAHO_BUILD_STATIC=True -DCMAKE_C_COMPILER=/home/user/octane_etk-6.0.0.240/arm-toolchain/bin/arm-none-linux-gnueabi-gcc  -DCMAKE_CXX_COMPILER=/home/user/octane_etk-6.0.0.240/arm-toolchain

在将库构建为静态库之后，现在我可以成功使用“makr arm”进行编译，即，下面给出的命令

root@user-VirtualBox:/home/user/octane_etk_sample-6.0.0.240# make cap
mkdir -p ./bin
arm-none-linux-gnueabi-g++ \
    -Wno-write-strings \
    -Iinclude \
    speedway_embedded_example.cpp \
    -Llib \
    -static -lltkcpp_atmel -lltkcppimpinj_atmel -lxml2_atmel \
    -lssl_atmel -lcrypto_atmel -ldl_atmel -lpaho-mqtt3c-static -ljansson -lpthread \
    -o bin/speedwayr_arm

Answer 1

顺序很重要，请在链接之前尝试生成对象:

arm-none-linux-gnueabi-g++ \
    -Wno-write-strings \
    -o bin/speedwayr_arm \
    -Iinclude \
    speedway_embedded_example.cpp -lpaho-mqtt3c \
    -Llib \
    -static -lltkcpp_atmel -lltkcppimpinj_atmel -lxml2_atmel \
    -lssl_atmel -lcrypto_atmel -ldl_atmel