在CMake Qt项目中链接和UIC订单

时间：2015-04-30 12:51:49

标签： c++ qt cmake

谈论使用cmake构建的Qt 5.3.2项目。 这是UIC执行和target_link_libraries之间的调用顺序问题......遗憾的是不是的顺序。

在本文下方，您将找到

1。）我的CMakeLists.txt和

的一个（仍然有效的）摘录部分

2。）'cmake'命令输出的摘录。

3。）以下调用'make'的输出而不使用 生成的标题如'ui_main.h'。

如果（在我的库 libqt.a 的源代码中）我需要'ui_main.h' make进程崩溃没有找到标题。看着 非崩溃make输出显示原因：

[..]
Scanning dependencies of target qt
[ 29%] Building CXX object CMakeFiles/qt.dir/home/kochmn/projects/sentinel/src/qt/form_main.cpp.o
[ 35%] Building CXX object CMakeFiles/qt.dir/qt_automoc.cpp.o
Linking CXX static library libqt.a
[..]
[ 52%] Generating ui_main.h
[..]

Make会在生成所需的头文件之前生成 libqt.a 。 所以我尝试使用像

这样的代码 
target_link_libraries(sentinel
  ${Qt5Widgets_LIBRARIES} ${Qt5Gui_LIBRARIES} ${Qt5Core_LIBRARIES})

add_library(optimization "${DIR_SRC}/optimization/linalg.cpp")
add_library(qt "${DIR_SRC}/qt/form_main.cpp")

target_link_libraries(sentinel qt optimization)

无济于事。问题：如何激励cmake 首先运行UIC生成ui-header文件然后然后编译我的 libqt.a ？

附录

# 2.8.11 instead of 2.8 required for automatic linking to the qtmain.lib
# library if this ever should expand to Windows.
# (http://doc.qt.io/qt-5/cmake-manual.html)
cmake_minimum_required(VERSION 2.8.11)

project(sentinel)

set( CMAKE_AUTOMOC ON )
# CMake uses uic in order to generate header files from .ui forms from designer.
set ( CMAKE AUTOUIC ON )
# Auto-generating functions write their headers into the build directory.
# Hence the build directory should be included.
set( CMAKE_INCLUDE_CURRENT_DIR ON )

#> Getting the Qt essentials. ----------------------------------------
# Widgets finds its own dependencies (QtGui and QtCore).
find_package(Qt5Widgets REQUIRED)

message ("Found Qt5Widgets Version ${Qt5Widgets_VERSION_STRING}")

# All those darling variables are explained here:
# http://doc.qt.io/qt-5/cmake-manual.html
message("Core    FOUND: ${Qt5Core_FOUND}")
message("Gui     FOUND: ${Qt5Gui_FOUND}")
message("Widgets FOUND: ${Qt5Widgets_FOUND}")
message("Core    VERSION: ${Qt5Core_VERSION_STRING}")
message("Gui     VERSION: ${Qt5Gui_VERSION_STRING}")
message("Widgets VERSION: ${Qt5Widgets_VERSION_STRING}")
message("Core    INCLUDE: ${Qt5Core_INCLUDE_DIRS}")
message("Gui     INCLUDE: ${Qt5Gui_INCLUDE_DIRS}")
message("Widgets INCLUDE: ${Qt5Widgets_INCLUDE_DIRS}")
message("Core    LIBRARIES: ${Qt5Core_LIBRARIES}")
message("Gui     LIBRARIES: ${Qt5Gui_LIBRARIES}")
message("Widgets LIBRARIES: ${Qt5Widgets_LIBRARIES}")
message("Core    DEFINITIONS: ${Qt5Core_DEFINITIONS}")
message("Gui     DEFINITIONS: ${Qt5Gui_DEFINITIONS}")
message("Widgets DEFINITIONS: ${Qt5Widgets_DEFINITIONS}")
message("Core    COMPILE_DEFINITIONS: ${Qt5Core_COMPILE_DEFINITIONS}")
message("Gui     COMPILE_DEFINITIONS: ${Qt5Gui_COMPILE_DEFINITIONS}")
message("Widgets COMPILE_DEFINITIONS: ${Qt5Widgets_COMPILE_DEFINITIONS}")
message("Core    EXECUTABLE_COMPILE_FLAGS: ${Qt5Core_EXECUTABLE_COMPILE_FLAGS}")
message("Gui     EXECUTABLE_COMPILE_FLAGS: ${Qt5Gui_EXECUTABLE_COMPILE_FLAGS}")
message("Widgets EXECUTABLE_COMPILE_FLAGS: ${Qt5Widgets_EXECUTABLE_COMPILE_FLAGS}")

include_directories(
  ${Qt5Widgets_INCLUDE_DIRS} ${Qt5Core_INCLUDE_DIRS} ${Qt5Gui_INCLUDE_DIRS})

add_definitions(${Qt5Widgets_DEFINITIONS})
#add_definitions(${Qt5Core_DEFINITIONS}) # Unnecessary. In Widgets.
#add_definitions(${Qt5Gui_DEFINITIONS})  # Unnecessary. In Widgets.
#< -------------------------------------------------------------------

set (DEBUG 1)
set (SENTINEL_NAME "Sentinel GL")
set (SENTINEL_VERSION_MAJOR "0")
set (SENTINEL_VERSION_MINOR "1")
set (SENTINEL_VERSION "${SENTINEL_VERSION_MAJOR}.${SENTINEL_VERSION_MINOR}")

## Compiler flags
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${Qt5Widgets_EXECUTABLE_COMPILE_FLAGS}")
#  ${Qt5Core_EXECUTABLE_COMPILE_FLAGS} ${Qt5Gui_EXECUTABLE_COMPILE_FLAGS} #<-- redundant.

if(CMAKE_COMPILER_IS_GNUCXX)
  message("Using GnuCXX compiler.")
  add_definitions("-O0 -std=c++0x -lSOIL -llapacke -lblas")
endif()

if (DEBUG MATCHES 1)
  message("\nBuilding DEBUG build.")
  add_definitions(-Wall)
  set(CMAKE_BUILD_TYPE Debug)
endif()

set(DIR_BASE "${PROJECT_SOURCE_DIR}/..")
set(DIR_SRC "${PROJECT_SOURCE_DIR}/../src")
set(DIR_RES "${PROJECT_SOURCE_DIR}/../resources")
set(DIR_BUILD "${PROJECT_SOURCE_DIR}/../build")

# Generated using uic FormMain.ui > ui_FormMain.h
set(qt_H
  "${DIR_BUILD}/ui_main.h" "${DIR_BUILD}/ui_dialog_setup_game.h")
# Generated using the trusty QtDesigner.
set(qt_UI
  "${DIR_SRC}/ui/main.ui" "${DIR_SRC}/ui/dialog_setup_game.ui")
# My own hand-written XML describing the internal resources.
set(qt_QRC "${DIR_RES}/application.qrc")

# generate rules for building source files that moc generates
QT5_WRAP_CPP(qt_H_MOC ${qt_H})
# generate rules for building header files from the ui files
QT5_WRAP_UI(qt_UI_H ${qt_UI})
# Resource Handling. QRC: "Qt Resource Collection"
QT5_ADD_RESOURCES(qt_RCCS ${qt_QRC})
# btw.: rcc generates a C program from ./resources/application.qrc
# However, this is not needed. cmake sees to that. :-)
#< -------------------------------------------------------------------

include_directories("${DIR_SRC}/include" "${PROJECT_SOURCE_DIR}")

add_executable(sentinel "${DIR_SRC}/sentinel.cpp" ${qt_H_MOC} ${qt_UI_H} ${qt_RCCS})

# Available modules are listed here: http://doc.qt.io/qt-5/qtmodules.html
#   find /usr/lib/x86_64-linux-gnu/cmake -iname "*.cmake*" | less
# Note: http://stackoverflow.com/questions/20266235/cmake-error-qglwidget-no-such-file-or-directory
qt5_use_modules(sentinel Widgets Gui Core)

add_library(optimization "${DIR_SRC}/optimization/linalg.cpp")
add_library(qt "${DIR_SRC}/qt/form_main.cpp")

target_link_libraries(sentinel
  ${Qt5Widgets_LIBRARIES} ${Qt5Gui_LIBRARIES} ${Qt5Core_LIBRARIES}
  qt optimization
)

kochmn@Ulyss:~/projects/sentinel/build$ cmake .
-- The C compiler identification is GNU 4.9.2
-- The CXX compiler identification is GNU 4.9.2
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- 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 Qt5Widgets Version 5.3.2
Core    FOUND: 1
Gui     FOUND: 1
Widgets FOUND: 1
Core    VERSION: 5.3.2
Gui     VERSION: 5.3.2
Widgets VERSION: 5.3.2
Core    INCLUDE: /usr/include/x86_64-linux-gnu/qt5/;/usr/include/x86_64-linux-gnu/qt5/QtCore;/usr/lib/x86_64-linux-gnu/qt5//mkspecs/linux-g++-64
Gui     INCLUDE: /usr/include/x86_64-linux-gnu/qt5/;/usr/include/x86_64-linux-gnu/qt5/QtGui;/usr/include/x86_64-linux-gnu/qt5/QtCore;/usr/lib/x86_64-linux-gnu/qt5//mkspecs/linux-g++-64
Widgets INCLUDE: /usr/include/x86_64-linux-gnu/qt5/;/usr/include/x86_64-linux-gnu/qt5/QtWidgets;/usr/include/x86_64-linux-gnu/qt5/QtGui;/usr/include/x86_64-linux-gnu/qt5/QtCore;/usr/lib/x86_64-linux-gnu/qt5//mkspecs/linux-g++-64
Core    LIBRARIES: Qt5::Core
Gui     LIBRARIES: Qt5::Gui
Widgets LIBRARIES: Qt5::Widgets
Core    DEFINITIONS: -DQT_CORE_LIB
Gui     DEFINITIONS: -DQT_GUI_LIB;-DQT_CORE_LIB
Widgets DEFINITIONS: -DQT_WIDGETS_LIB;-DQT_GUI_LIB;-DQT_CORE_LIB
Core    COMPILE_DEFINITIONS: QT_CORE_LIB
Gui     COMPILE_DEFINITIONS: QT_GUI_LIB;QT_CORE_LIB
Widgets COMPILE_DEFINITIONS: QT_WIDGETS_LIB;QT_GUI_LIB;QT_CORE_LIB
Core    EXECUTABLE_COMPILE_FLAGS: -fPIE
Gui     EXECUTABLE_COMPILE_FLAGS: -fPIE
Widgets EXECUTABLE_COMPILE_FLAGS: -fPIE
Using GnuCXX compiler.

Building DEBUG build.

Sentinel GL -- C++ Project V 0.1.

(c) Markus-Hermann Koch, mhk@markuskoch.eu, 2015/04/28-?

Primary directory is /home/kochmn/projects/sentinel/build
System is Linux
Generating configuration header: "/home/kochmn/projects/sentinel/build/../build/mhk_cmake_config.h"
-- Configuring done
-- Generating done
-- Build files have been written to: /home/kochmn/projects/sentinel/build

kochmn@Ulyss:~/projects/sentinel/build$ make 
Scanning dependencies of target optimization_automoc
[  5%] Automatic moc for target optimization
[  5%] Built target optimization_automoc
Scanning dependencies of target optimization
[ 11%] Building CXX object CMakeFiles/optimization.dir/home/kochmn/projects/sentinel/src/optimization/linalg.cpp.o
[ 17%] Building CXX object CMakeFiles/optimization.dir/optimization_automoc.cpp.o
Linking CXX static library liboptimization.a
[ 17%] Built target optimization
Scanning dependencies of target qt_automoc
[ 23%] Automatic moc for target qt
[ 23%] Built target qt_automoc
Scanning dependencies of target qt
[ 29%] Building CXX object CMakeFiles/qt.dir/home/kochmn/projects/sentinel/src/qt/form_main.cpp.o
[ 35%] Building CXX object CMakeFiles/qt.dir/qt_automoc.cpp.o
Linking CXX static library libqt.a
[ 35%] Built target qt
Scanning dependencies of target sentinel_automoc
[ 41%] Automatic moc for target sentinel
[ 41%] Built target sentinel_automoc
[ 47%] Generating qrc_application.cpp
[ 52%] Generating ui_main.h
[ 58%] Generating moc_ui_main.cpp
/home/kochmn/projects/sentinel/build/ui_main.h:0: Note: No relevant classes found. No output generated.
[ 64%] Generating ui_dialog_setup_game.h
[ 70%] Generating moc_ui_dialog_setup_game.cpp
/home/kochmn/projects/sentinel/build/ui_dialog_setup_game.h:0: Note: No relevant classes found. No output generated.
Scanning dependencies of target sentinel
[ 76%] Building CXX object CMakeFiles/sentinel.dir/home/kochmn/projects/sentinel/src/sentinel.cpp.o
[ 82%] Building CXX object CMakeFiles/sentinel.dir/moc_ui_main.cpp.o
[ 88%] Building CXX object CMakeFiles/sentinel.dir/moc_ui_dialog_setup_game.cpp.o
[ 94%] Building CXX object CMakeFiles/sentinel.dir/qrc_application.cpp.o
[100%] Building CXX object CMakeFiles/sentinel.dir/sentinel_automoc.cpp.o
Linking CXX executable sentinel
[100%] Built target sentinel

1 个答案:

答案 0 :(得分：3)

CMake生成顺序是根据文件和目标之间的依赖关系计算的。如果您的 qt 库依赖于.ui文件生成的标头，那么您必须在目标${qt_UI_H}的输入中添加qt：

QT5_WRAP_UI(qt_UI_H ${qt_UI})
[...]
add_library(qt "${DIR_SRC}/qt/form_main.cpp" ${qt_UI_H})

在编译libqt

之前，CMake通常应该在.ui文件上执行UIC

顺便使用target_link_libraries仅在链接时设置目标之间的依赖关系。在编译时，正常行为是＆＃34;应找到所有源文件＆＃34;。在您的情况下，会生成一些标头，因此将这些标头设置为目标的输入可确保在编译目标之前执行生成它们的宏（QT5_WRAP_UI）。

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