[CMake] Help using CMake & Expat in Windows
Clark Taylor
clark.n.taylor at gmail.com
Sat Jul 31 10:24:23 EDT 2010
Please ignore my last e-mail. For some reason, my e-mail ate Stefan's
earlier response, but I just saw it in the digest I receive. I'll try his
suggestions out and see if it works.
Clark
On Sat, Jul 31, 2010 at 10:21 AM, Clark Taylor <clark.n.taylor at gmail.com>wrote:
> This is very helpful. Thank you!
>
> My other question though is how can I get Cmake to add the correct
> information into the visual studio solution. Even though I have put in the
> directory names in the cmake gui, I then have to add the same directories
> manually to the solution. Did I miss something simple. To me the advantage
> of cmake is that it automatically sets everything up for you in the Visual
> Studio solutions, which is great. However, even when I manually put in the
> directories in the cmake-gui, it doesn't seem to add the information to the
> solution. With that information in there, I can definitely have it copy the
> .dll to the correct location.
>
> Thanks again for all your help.
> Clark
>
>
> On Sat, Jul 31, 2010 at 9:44 AM, Michael Jackson <
> mike.jackson at bluequartz.net> wrote:
>
>> On Fri, Jul 30, 2010 at 7:15 PM, John Drescher <drescherjm at gmail.com>
>> wrote:
>> >> I have created a very simple CMake file (I am a newbie) that works
>> >> wonderfully in Linux, but am having problems in Windows. The
>> CMakeLists.txt
>> >> is below
>> >>
>> >> #I think 2.6 is required for some of things I do below, but I am not
>> sure
>> >> CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
>> >>
>> >> # This is the CMake file for my application. This
>> >> # will be my first CMake file of decent size, so please excuse
>> >> # any particularly bad syntax :)
>> >> PROJECT(MyApp)
>> >> FIND_PACKAGE(wxWidgets REQUIRED)
>> >> FIND_PACKAGE(OpenCV REQUIRED)
>> >> FIND_PACKAGE(EXPAT REQUIRED)
>> >> INCLUDE (${wxWidgets_USE_FILE} ${OpenCV_USE_FILE}
>> ${EXPAT_INCLUDE_DIRS})
>> >>
>> >> SET(Headers myApp.h myAppGUI.h myAppGUImpl.h Coordinates/Coordinates.h)
>> >> SET(Src myApp.cpp myAppGUI.cpp myAppGUImpl.cpp
>> Coordinates/Coordinates.cpp)
>> >> ADD_EXECUTABLE(myApp ${Headers} ${Src})
>> >> TARGET_LINK_LIBRARIES(myApp ${wxWidgets_LIBRARIES} ${OpenCV_LIBS}
>> >> ${EXPAT_LIBRARIES})
>> >>
>> >> #End of code
>> >>
>> >> Everything works great in Linux, but when I try to use this in Windows,
>> I
>> >> have series of problems, all inter-related.
>> >>
>> >> Problem #1. While wxWidgets and OpenCV work seamlessly, Cmake can't
>> find
>> >> the expat libraries. (They are installed. I installed the
>> expat libraries
>> >> using the basic windows download and install package).
>> >
>> > CMake rarely finds libraries on windows. The main reason is there is
>> > no OS standard path for libraries or header files. For me its even
>> > less likely to find stuff since I build on X: and not the same drive
>> > as the OS. To fix this normally you run cmake-gui and it tells me it
>> > can not find a package set the projectname_dir variable. After setting
>> > this variable in cmake-gui all is well.
>> >
>> >>
>> >> Problem #2. While I can overcome problem #1 by hardcoding in where the
>> >> expat include directory and library files are (setting the values in
>> the
>> >> CMake GUI), when I then open up the resulting solution in Visual Studio
>> 2008
>> >> Express and compile my code, the compiler gives the error "can't find
>> >> expat.h"
>> >>
>> >
>> > That is normally the correct solution.
>> >
>> >>
>> >> Problem #3. I can fix that problem as well by directly modifying the
>> >> solution properties, but then when I run the project, it dies because
>> it
>> >> can't find libexpat.dll.
>> >>
>> > In your CMakeLists.txt have it copy the libexpat.dll to your debug,
>> > release .. folder. Do that as a custom build step or an install step.
>> >
>> > Here are two ways I do this for Qt libraries (modify this for libexpat):
>> >
>> > The first uses an install.
>> >
>> > IF (WIN32)
>> > IF (GET_RUNTIME)
>> > INSTALL(FILES
>> > "${QT_BINARY_DIR}/QtCored${QT_VERSION_MAJOR}.dll"
>> > "${QT_BINARY_DIR}/QtXmld${QT_VERSION_MAJOR}.dll"
>> > "${QT_BINARY_DIR}/QtTestd${QT_VERSION_MAJOR}.dll"
>> > "${QT_BINARY_DIR}/QtGuid${QT_VERSION_MAJOR}.dll"
>> > "${QT_BINARY_DIR}/QtNetworkd${QT_VERSION_MAJOR}.dll"
>> > "${QT_BINARY_DIR}/QtScriptd${QT_VERSION_MAJOR}.dll"
>> > DESTINATION ${EXECUTABLE_OUTPUT_PATH}/Debug
>> > )
>> > INSTALL(FILES
>> > "${QT_BINARY_DIR}/QtCore${QT_VERSION_MAJOR}.dll"
>> > "${QT_BINARY_DIR}/QtXml${QT_VERSION_MAJOR}.dll"
>> > "${QT_BINARY_DIR}/QtTest${QT_VERSION_MAJOR}.dll"
>> > "${QT_BINARY_DIR}/QtGui${QT_VERSION_MAJOR}.dll"
>> > "${QT_BINARY_DIR}/QtNetwork${QT_VERSION_MAJOR}.dll"
>> > "${QT_BINARY_DIR}/QtScript${QT_VERSION_MAJOR}.dll"
>> > DESTINATION ${EXECUTABLE_OUTPUT_PATH}/RelWithDebInfo
>> > )
>> > ENDIF(GET_RUNTIME)
>> > ENDIF(WIN32)
>> >
>> > The second uses a custom build step:
>> >
>> > # Copy the needed Qt libraries into the Build directory. Also add
>> installation
>> > # and CPack code to support installer generation.
>> > # this is a complete hack for Visual Studio to copy the Qt libraries.
>> > if ( NOT Q_WS_MAC)
>> > if (DEFINED QT_QMAKE_EXECUTABLE)
>> > SET (QTLIBLIST QtCore QtGui)
>> >
>> > IF (MSVC)
>> > set(TYPE "d")
>> > FOREACH(qtlib ${QTLIBLIST})
>> > IF (WIN32)
>> > GET_FILENAME_COMPONENT(QT_DLL_PATH_tmp
>> > ${QT_QMAKE_EXECUTABLE} PATH)
>> > file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/Debug)
>> > file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/Release)
>> > file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/MinSizeRel)
>> > file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/RelWithDebInfo)
>> > INSTALL(FILES ${QT_DLL_PATH_tmp}/${qtlib}${type}d4.dll
>> > DESTINATION ./
>> > CONFIGURATIONS Debug
>> > COMPONENT Applications)
>> > INSTALL(FILES ${QT_DLL_PATH_tmp}/${qtlib}4.dll
>> > DESTINATION ./
>> > CONFIGURATIONS Release
>> > COMPONENT Applications)
>> > add_custom_target(ZZ_${qtlib}-Debug-Copy ALL
>> > COMMAND ${CMAKE_COMMAND} -E
>> > copy_if_different
>> ${QT_DLL_PATH_tmp}/${qtlib}${TYPE}4.dll
>> > ${PROJECT_BINARY_DIR}/Debug/
>> > COMMENT "Copying ${qtlib}${TYPE}4.dll to
>> > ${PROJECT_BINARY_DIR}/Debug/")
>> > add_custom_target(ZZ_${qtlib}-Release-Copy ALL
>> > COMMAND ${CMAKE_COMMAND} -E
>> > copy_if_different
>> ${QT_DLL_PATH_tmp}/${qtlib}4.dll
>> > ${PROJECT_BINARY_DIR}/Release/
>> > COMMENT "Copying ${qtlib}4.dll to
>> > ${PROJECT_BINARY_DIR}/Release/")
>> > ENDIF (WIN32)
>> > ENDFOREACH(qtlib)
>> >
>> > endif(MSVC)
>> > endif(DEFINED QT_QMAKE_EXECUTABLE)
>> > endif(NOT Q_WS_MAC)
>> >
>> >
>> >>
>> >> So, in summary, I think cmake is completely ignoring libexpat, even
>> when I
>> >> explicitly tell it (in the gui) where the include and library files
>> are.
>> >>
>> >> Any ideas?
>> >>
>> > Follow the advice by Stefan. I too believe that is the reason why the
>> > include did not work.
>> >
>> > John
>>
>> Here is a slightly improved version of the above:
>>
>>
>> # --------------------------------------------------------------------
>> # Copy the needed Qt libraries into the Build directory. Also add
>> installation
>> # and CPack code to support installer generation.
>> # --------------------------------------------------------------------
>> if ( NOT Q_WS_MAC AND MSVC AND DEFINED QT_QMAKE_EXECUTABLE)
>>
>> SET (QTLIBLIST QtCore QtGui)
>> SET (QTPLUGINLIST qgif qjpeg qtiff)
>> set (BUILD_TYPES "Debug;Release")
>>
>> foreach (btype ${BUILD_TYPES})
>> string(TOUPPER ${btype} BTYPE)
>> file(MAKE_DIRECTORY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${btype})
>> foreach(qtlib ${QTLIBLIST})
>>
>> string(TOUPPER ${qtlib} QTLIB)
>> # message(STATUS "QT_${QTLIB}_LIBRARY_${BTYPE}:
>> ${QT_${QTLIB}_LIBRARY_${BTYPE}}")
>> GET_FILENAME_COMPONENT(DLL_NAME
>> ${QT_${QTLIB}_LIBRARY_${BTYPE}} NAME_WE)
>> # message(STATUS "DLL_NAME: ${DLL_NAME}")
>> GET_FILENAME_COMPONENT(QT_BIN_PATH ${QT_QMAKE_EXECUTABLE} PATH)
>> # message(STATUS "QT_BIN_PATH: ${QT_BIN_PATH}")
>>
>> INSTALL(FILES ${QT_BIN_PATH}/${DLL_NAME}.dll
>> DESTINATION ./
>> CONFIGURATIONS ${btype}
>> COMPONENT Applications)
>>
>> add_custom_target(Z_${qtlib}-${BTYPE}-Copy ALL
>> COMMAND ${CMAKE_COMMAND} -E copy_if_different
>> ${QT_BIN_PATH}/${DLL_NAME}.dll
>> ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${btype}/
>> COMMENT "Copying
>> ${QT_BIN_PATH}/${DLL_NAME}.dll to
>> ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${btype}/")
>>
>> endforeach()
>>
>> # For this project we also need to copy the imageformat Qt plugins
>> which should have already been defined
>> # in the cmake variables QTPLUGINS_DEBUG, QTPLUGINS_RELEASE and
>> QTPLUGINS
>> file(MAKE_DIRECTORY
>> ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${btype}/plugins/imageformats)
>> foreach(plugin ${QTPLUGINLIST})
>> string(TOUPPER ${plugin} PLUGIN)
>> # message(STATUS "QT_${QTLIB}_LIBRARY_${BTYPE}:
>> ${QT_${QTLIB}_LIBRARY_${BTYPE}}")
>> GET_FILENAME_COMPONENT(DLL_NAME
>> ${QT_${PLUGIN}_PLUGIN_${BTYPE}} NAME_WE)
>> # message(STATUS "DLL_NAME: ${DLL_NAME}")
>> # GET_FILENAME_COMPONENT(QT_BIN_PATH ${QT_QMAKE_EXECUTABLE}
>> PATH)
>> # message(STATUS "QT_BIN_PATH: ${QT_BIN_PATH}")
>>
>> INSTALL(FILES ${QT_PLUGINS_DIR}/imageformats/${DLL_NAME}.dll
>> DESTINATION ./plugins/imageformats
>> CONFIGURATIONS ${btype}
>> COMPONENT Applications)
>>
>> add_custom_target(Z_${plugin}-${BTYPE}-Copy ALL
>> COMMAND ${CMAKE_COMMAND} -E copy_if_different
>> ${QT_PLUGINS_DIR}/imageformats/${DLL_NAME}.dll
>>
>> ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${btype}/plugins/imageformats/
>> COMMENT "Copying
>> ${QT_PLUGINS_DIR}/imageformats/${DLL_NAME}.dll to
>> ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${btype}/plugins/imageformats")
>>
>> endforeach(plugin ${QTPLUGINS_${BTYPE}})
>>
>> #write a qt.conf file into the application directory and
>> install it
>> file(WRITE
>> ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${btype}/qt.conf "")
>> INSTALL(FILES
>> ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${btype}/qt.conf
>> DESTINATION .
>> CONFIGURATIONS ${btype}
>> COMPONENT Applications )
>>
>> endforeach()
>> endif()
>>
>> Mike Jackson
>>
>
>
>
> --
> Clark
>
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