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c++ - CMake链接器输入文件未使用，因为链接未完成

问题描述

我想将一个旧的项目转移到 CMake。以前它使用带有自定义变量、定义等的 Makefile。我指定了相同的标志来编译各种配置。我是这样做的：

cmake_minimum_required(VERSION 3.2.2)
project(wise_RK)

set(CMAKE_VERBOSE_MAKEFILE ON)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED True)
set(SOURCES main.cpp devices/RK.cpp LogWriter/LogWriter.cpp)
set(CMAKE_CXX_FLAGS "-DIMA -std=c++11 -Wall -Wextra -c -O2 -MMD -MP -MF '$@.d'")
set(CMAKE_INCLUDE_CURRENT_DIR ON)

include_directories(
    structs
    devices
    LogWriter
    /home/data/lib/wise_versioning
    /home/data/lib/wisenet
    /home/data/lib/wise_log
    /home/data/lib/wise_rs_device
    /home/data/lib/json
)

# wise_rs_device
add_library(wise_rs_device STATIC IMPORTED GLOBAL)
set_target_properties(wise_rs_device PROPERTIES
    IMPORTED_LOCATION "/home/data/lib/wise_rs_device/libwise_rs_device.a"
    INTERFACE_INCLUDE_DIRECTORIES "/home/data/lib/wise_rs_device/"
)

# wisenet
add_library(wisenet STATIC IMPORTED GLOBAL)
set_target_properties(wisenet PROPERTIES
    IMPORTED_LOCATION "/home/data/lib/wisenet/libwise_net_rs485.so"
    INTERFACE_INCLUDE_DIRECTORIES "/home/data/lib/wisenet/"
)

#wise_log
add_library(wise_log STATIC IMPORTED GLOBAL)
set_target_properties(wise_log PROPERTIES
    IMPORTED_LOCATION "/home/data/lib/wise_log/Release/GNU-Linux/libwise_log.so"
    INTERFACE_INCLUDE_DIRECTORIES "/home/data/lib/wise_log/"
)

add_executable(wise_rk ${SOURCES})

target_link_libraries(wise_rk PRIVATE wise_rs_device wisenet wise_log)

add_definitions(-DSOME_IMPORTANT_DEFINITION)

-D是各种配置的定义。

在 Makefile 中，程序集中涉及的项目目标文件（不是库）的列表是这样的：

OBJECTS:=$(shell find * -type f -name "*.cpp" | sed "s/\.cpp/\.o /" | sort)
DEPENDS:=$(addprefix build/$(CONF)/, ${OBJECTS:.o=.o.d})
-include ${DEPENDS}

当我构建我的 CMake 时：

/usr/local/bin/cmake -E cmake_link_script CMakeFiles/wise_rk.dir/link.txt --verbose=1
/usr/bin/c++   -DIMA -std=c++11 -Wall -Wextra -c -O2 -MMD -MP -MF '$@.d'   CMakeFiles/wise_rk.dir/main.cpp.o CMakeFiles/wise_rk.dir/devices/RK.cpp.o CMakeFiles/wise_rk.dir/LogWriter/LogWriter.cpp.o  -o wise_rk -rdynamic /home/data/lib/wise_rs_device/libwise_rs_device.a /home/data/lib/wisenet/libwise_net_rs485.so /home/data/lib/wise_log/Release/GNU-Linux/libwise_log.so 
c++: warning: CMakeFiles/wise_rk.dir/main.cpp.o: linker input file unused because linking not done
c++: warning: CMakeFiles/wise_rk.dir/devices/RK.cpp.o: linker input file unused because linking not done
c++: warning: CMakeFiles/wise_rk.dir/LogWriter/LogWriter.cpp.o: linker input file unused because linking not done
c++: warning: /home/data/lib/wise_rs_device/libwise_rs_device.a: linker input file unused because linking not done
c++: warning: /home/data/lib/wisenet/libwise_net_rs485.so: linker input file unused because linking not done
c++: warning: /home/data/lib/wise_log/Release/GNU-Linux/libwise_log.so: linker input file unused because linking not done
make[2]: Leaving directory `/home/anzipex/Downloads/wise_RK/build'
/usr/local/bin/cmake -E cmake_progress_report /home/anzipex/Downloads/wise_RK/build/CMakeFiles  1 2 3
[100%] Built target wise_rk
make[1]: Leaving directory `/home/anzipex/Downloads/wise_RK/build'
/usr/local/bin/cmake -E cmake_progress_start /home/anzipex/Downloads/wise_RK/build/CMakeFiles 0

我不知道下一步该怎么做才能解决此类问题。

标签： c++cmake

解决方案

我将所有.so库更改为SHARED. -c -O2 -MMD -MP -MF '$@.d'并且还删除了@Botje 所写的部分标志。看起来像项目建成。

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