使用cmake交叉编译qt应用程序时的链接问题

我目前正在切换我的Qt应用程序的构建系统从qmake到cmake。在尝试用MinGW(静态Qt构建)交叉编译Windows时，我遇到了一个我无法解释的奇怪问题:

CMakeLists.txt:

project(noble)
cmake_minimum_required(VERSION 2.8.5)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")
find_package(Boost COMPONENTS program_options thread REQUIRED)
find_package(Qt4 REQUIRED QtCore QtGui)
find_package(BLAS REQUIRED)
find_package(LAPACK REQUIRED)
find_package(Armadillo)
find_package(Qwt6 REQUIRED)
set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR})
set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR})
include(${QT_USE_FILE})
set(LIBRARIES
    ${Qwt6_Qt4_LIBRARY}
    ${QT_QTCORE_LIBRARY}
    ${QT_QTGUI_LIBRARY}
    ${Boost_LIBRARIES}
    ${BLAS_LIBRARIES}
    ${LAPACK_LIBRARIES}
    )
set(DEFINITIONS
    ${QT_DEFINITIONS}
    ${BLAS_LINKER_FLAGS}
    ${LAPACK_LINKER_FLAGS}
    -DBOOST_THREAD_USE_LIB
    )
add_subdirectory(src)
add_subdirectory(plugins)

src/CMakeLists.txt:

set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(noble_SOURCES
    #file names...
    )
set(noble_HEADERS
    #file names...
    )
set(noble_FORMS
    #file names...
    )
QT4_WRAP_UI(noble_FORMS_HEADERS ${noble_FORMS})
QT4_WRAP_CPP(noble_HEADERS_MOC ${noble_HEADERS})
include_directories(
    ${Boost_INCLUDE_DIRS}
    ${ARMADILLO_INCLUDE_DIRS}
    ${Qwt6_INCLUDE_DIR}
    )
add_definitions(${DEFINITIONS})
add_executable(noble
    ${noble_SOURCES}
    ${noble_HEADERS_MOC}
    ${noble_FORMS_HEADERS}
    )
target_link_libraries(noble 
    ${LIBRARIES}
    -lQtGui -lQtCore
    -ljpeg -lpng -ltiff -lmng -lz -limm32 -llcms -lwinmm
    -fopenmp
    )

我现在试图摆脱手动设置编译器标志的权利在最后。如果省略-lQtGui -lQtCore，就会得到一堆未定义引用，比如

/home/mjung/Programme/mingw-cross-env-2.21/usr/lib/gcc/i686-pc-mingw32/4.6.0/../../../../i686-pc-mingw32/lib/libQtGui.a(qapplication.o):qapplication.cpp:(.text+0x2340): undefined reference to `QBasicTimer::stop()'

如果我保留这些标志，程序可以正常编译。

现在奇怪的事情是:

cmake g++叫与 -lQtGui -lQtCore标记:

/home/mjung/Programme/mingw-cross-env-2.21/usr/bin/i686-pc-mingw32-g++
-Wl,--whole-archive
CMakeFiles/noble.dir/objects.a
-Wl,--no-whole-archive
-o ../noble.exe
-Wl,--out-implib,../libnoble.dll.a
-Wl,--major-image-version,0,--minor-image-version,0
/home/mjung/Programme/windows_builds/usr/lib/libqwt.a
-Wl,-Bstatic
-lQtCore -lQtGui
-lboost_program_options-mt
-lboost_thread-mt
-Wl,-Bdynamic
/home/mjung/Programme/windows_builds/usr/lib/libblas.a
/home/mjung/Programme/windows_builds/usr/lib/liblapack.a
/home/mjung/Programme/windows_builds/usr/lib/libblas.a
-lQtGui -lQtCore
-ljpeg -lpng -ltiff -lmng -lz -limm32 -llcms -lwinmm
-fopenmp
/home/mjung/Programme/windows_builds/usr/lib/liblapack.a
-lQtGui -lQtCore
-ljpeg -lpng -ltiff -lmng -lz -limm32 -llcms -lwinmm
-lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32

cmake的g++调用没有 -lQtGui -lQtCore标志:

/home/mjung/Programme/mingw-cross-env-2.21/usr/bin/i686-pc-mingw32-g++
-Wl,--whole-archive
CMakeFiles/noble.dir/objects.a
-Wl,--no-whole-archive
-o ../noble.exe
-Wl,--out-implib,../libnoble.dll.a
-Wl,--major-image-version,0,--minor-image-version,0
/home/mjung/Programme/windows_builds/usr/lib/libqwt.a
-Wl,-Bstatic
-lQtCore -lQtGui
-lboost_program_options-mt
-lboost_thread-mt
-Wl,-Bdynamic
/home/mjung/Programme/windows_builds/usr/lib/libblas.a
/home/mjung/Programme/windows_builds/usr/lib/liblapack.a
/home/mjung/Programme/windows_builds/usr/lib/libblas.a
-ljpeg -lpng -ltiff -lmng -lz -limm32 -llcms -lwinmm
-fopenmp
/home/mjung/Programme/windows_builds/usr/lib/liblapack.a
-ljpeg -lpng -ltiff -lmng -lz -limm32 -llcms -lwinmm
-lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32

即使我做不是手动设置编译器标志，FindQt4.cmake脚本仍然设置它们。但这似乎还不够。我完全不明白，如果自动设置一次标志，或者手动添加三次标志，为什么会有什么不同。这和旗帜的顺序有关吗?

你有什么想法吗?如有任何帮助，不胜感激。

更新:

别介意……我只是从

set(LIBRARIES
    ${Qwt6_Qt4_LIBRARY}
    ${QT_QTCORE_LIBRARY}
    ${QT_QTGUI_LIBRARY}
    ${Boost_LIBRARIES}
    ${BLAS_LIBRARIES}
    ${LAPACK_LIBRARIES}
    )

set(LIBRARIES
    ${Qwt6_Qt4_LIBRARY}
    ${QT_QTGUI_LIBRARY}
    ${QT_QTCORE_LIBRARY}
    ${Boost_LIBRARIES}
    ${BLAS_LIBRARIES}
    ${LAPACK_LIBRARIES}
    )

我不太明白为什么要这样，但现在它工作了…

PS:我本来想把这个贴出来作为一个答案，但由于缺乏声誉，我还不允许这样做。