将QT 5.5与cmake-gui项目联系起来

Question

我正在尝试构建一个使用QT 5.5库的项目。要创建CMake文件，我正在使用cmake-gui并链接到库。默认情况下，程序将项目链接到QT 4.X的文件和目录，同时在QT 5.5中查找相同的文件和目录。 ，我注意到其中一些不存在。 （按照印刷品）

这里可以看到有文件链接到QT 4.X和QT 5.5

虽然您可以构建文件，但尝试使用make install命令会显示如下所示的错误。我认为这些错误正是因为缺少QT 4.X文件替换的QT 5.5档案而发生的。

这些是我试图解决的错误

在这里，我开始看到必须是一种方式将目录链接到丢失的文件，不再有这种错误的方式

我试图手动更改生成文件的包含目录，但是由于生成的错误数量，它似乎不可行。有没有办法在QT 5.5版本中“替换”那些丢失的文件？

这是用于此项目的CMakeLists.txt文件：

project(PacpusSensors)
cmake_minimum_required(VERSION 2.8)

# ========================================
# PacpusSensors version
# ========================================
set(PacpusSensors_MAJOR_VERSION 0)
set(PacpusSensors_MINOR_VERSION 1)
set(PacpusSensors_PATCH_VERSION 1)
set(PacpusSensors_VERSION
    "${PacpusSensors_MAJOR_VERSION}.${PacpusSensors_MINOR_VERSION}.${PacpusSensors_PATCH_VERSION}")

# ========================================
# Configure CMake 
# ========================================
set(PACPUS_ROOT "/home/marvsdd/PACPUS/export")
if(NOT ${PACPUS_ROOT} STREQUAL "")
    set(CMAKE_MODULE_PATH ${PACPUS_ROOT}/cmake)
    string (REPLACE "\\" "/" CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH})
    message (STATUS "setting CMAKE_MODULE_PATH to: "  ${CMAKE_MODULE_PATH})
elseif( NOT $ENV{PACPUS_ROOT} STREQUAL "")
    set(PACPUS_ROOT $ENV{PACPUS_ROOT})
    set(CMAKE_MODULE_PATH $ENV{PACPUS_ROOT}/cmake)
    string (REPLACE "\\" "/" CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH})
    message (STATUS "setting CMAKE_MODULE_PATH to: " ${CMAKE_MODULE_PATH})
    message (STATUS "PACPUS_ROOT is: " ${PACPUS_ROOT})
else()
    message (FATAL_ERROR "Environment variable PACPUS_ROOT not set, please define it in your operating system or pass it as argument to the cmake command")
endif()

include(${CMAKE_MODULE_PATH}/PacpusUtilities.cmake)
include(${CMAKE_MODULE_PATH}/PacpusConfiguration.cmake)
include(${CMAKE_MODULE_PATH}/PacpusDependencies.cmake)
include(${CMAKE_MODULE_PATH}/PacpusPlatforms.cmake)

# ========================================
# Pre-configuration of the compiler
# ========================================
find_package(Pacpus REQUIRED)
# Includes directories
if(PACPUS_FOUND)
include_directories(
  ${PACPUS_DEPENDENCIES_INC}
  ${PACPUS_INCLUDE_DIR}
)
# Compiler flags coming from PacpusDependencies and PacpusPlatforms
add_definitions(${PACPUS_DEFINITIONS})
endif(PACPUS_FOUND)


# ========================================
# Find dependencies
# ========================================
find_package(Qt4 REQUIRED)
if(QT4_FOUND)
    set(QT_USE_QTNETWORK TRUE)
    set(QT_USE_QTOPENGL TRUE)
    set(QT_USE_QTXML TRUE)
    include(${QT_USE_FILE})
    add_definitions( ${QT_DEFINITIONS} )
    add_definitions( -DQT_PLUGIN )
endif(QT4_FOUND)

include_directories(
  ${PACPUS_DEPENDENCIES_INC}
  ${PACPUS_INCLUDE_DIR}
  ${PACPUS_INCLUDE_HINT}
  ${PACPUS_INCLUDE_HINT}/Pacpus
  ./PACPUS/include
)

# ========================================
# Build the PacpusSensors' modules
# ========================================
add_subdirectory(PacpusSocket)
add_subdirectory(Sick)

# ========================================
# Summary
# ========================================
pacpus_info("")
pacpus_info("=====================================================================")
pacpus_info("Configuration for PacpusSensors ${PacpusSensors_VERSION}")
pacpus_info("=====================================================================")
pacpus_info("")
pacpus_info("  Platform:")
pacpus_info("    Host:" ${CMAKE_HOST_SYSTEM_NAME} ${CMAKE_HOST_SYSTEM_VERSION} ${CMAKE_HOST_SYSTEM_PROCESSOR})
if(CMAKE_CROSS_COMPILING)
    pacpus_info("    Target:" ${CMAKE_SYSTEM_NAME} ${CMAKE_SYSTEM_VERSION} ${CMAKE_SYSTEM_PROCESSOR})
endif()
pacpus_info("    CMake:" ${CMAKE_VERSION})
pacpus_info("    CMake generator:" ${CMAKE_GENERATOR})
pacpus_info("    CMake build tool:" ${CMAKE_BUILD_TOOL})
if(MSVC)
    pacpus_info("    MSVC:" ${MSVC_VERSION})
else()
    pacpus_info("    Configuration:" ${CMAKE_BUILD_TYPE})
endif()
pacpus_info("")
pacpus_info("  Compiler:")
pacpus_info("    C++ Compiler:" ${CMAKE_CXX_COMPILER})
pacpus_info("    C++ flags (release):" ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_RELEASE})
pacpus_info("    C++ flags (debug):" ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_DEBUG})
pacpus_info("")
pacpus_info("  Pacpus:")
pacpus_info("    PacpusFramework path:" ${PACPUS_ROOT})
pacpus_info("    Log4cxx logging enabled:" ${PACPUS_USE_LOG})
pacpus_info("")
if("${CMAKE_CURRENT_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_BINARY_DIR}")
    message(WARNING "The source directory is the same as build directory. \"make clean\" may damage the source tree")
endif()

Answer 1

我看到的第一件事就是Qt4和Qt5在这里混合了。如果您已安装两者，那就没关系，但一定要使用正确的。我假设你想要Qt5。

链接到Qt5的简单示例如下所示：

find_package(Qt5 REQUIRED Network OpenGL Xml) #Qt5Core is implicit
target_link_libraries(MyApplication Qt5::Network Qt5::OpenGL Qt5::Xml)

你不需要if(Qt5_FOUND)因为包是REQUIRED意味着如果没有找到QT它会失败并出错。

在您的CMakeLists.txt中，您没有定义任何目标。您通常会使用add_executable，add_library或add_custom_target cmake函数执行此操作。这意味着目标可能在您的子目录中定义。在子目录中找到适当的CMakeLists.txt并在那里使用target_link_libraries命令。此命令将添加正确的标头并为您执行适当的链接。

如果Qt只是标题，那么使用全局include_directories()和add_definitions()会起作用，但由于你需要将你的应用程序链接到Qt，你需要在解决方案中更深入地使用target_link_libraries()。

有关更多信息，请查看Qt's documentation