Archive:Development/CMake FAQ (zh TW)

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Development/CMake FAQ

常見問題

These are KDE's FAQ for CMake, there is also a CMake FAQ in the main CMake wiki.

如何讓我最喜歡的編輯器支援 CMake 語法和縮排？

請閱讀CMake Wiki 的 CMake 編輯器支援章節。這裡說明如何設定 Emacs（XEmacs works too）、VIM、Kate、KWrite 和 KDevelop。

我需要在建構過程中產生一些檔案，我該怎麼做？

使用 ADD_CUSTOM_COMMAND()。在 CMake wiki 的如何在建構過程中生成原始碼檔案有解釋

我想在建構過程中建立一個稍後使用的可執行檔。我該怎麼做？

假設可執行檔叫 genembed。那麼使用 KDE4_ADD_EXECUTABLE(foo RUN_UNINSTALLED ${fooSources})來建立可執行檔。RUN_UNINSTALLED 選項非常重要，因為可執行檔必須從建構目錄執行，並會連結到建構目錄中的一些函式庫。為了達成這個目的，可執行檔透過 RPATH 設定和 shell 腳本包裝編譯，和執行檔的名稱一樣只是多了個｢.sh｣。這個 shell 腳本建立 LD_LIBRARY_PATH 並呼叫實際的執行檔。

依照上面說明的在 ADD_CUSTOM_COMMAND() 中使用這個 shell 腳本包裝。 您可以通過查詢 WRAPPER_SCRIPT 來找到名稱和確切的路徑。這裡有一個來自 kdelibs/kstyles/keramik/ 的完整例子：

  1. build the executable

kde4_add_executable(genembed RUN_UNINSTALLED ${genembed_SRCS})

  1. get the name of the generated wrapper script (which sets up LD_LIBRARY_PATH)

get_target_property(GENEMBED_EXECUTABLE genembed WRAPPER_SCRIPT)

  1. and the custom command

add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/keramikrc.h 

 COMMAND ${GENEMBED_EXECUTABLE} --file ${CMAKE_CURRENT_BINARY_DIR}/keramikPics.txt > \
 ${CMAKE_CURRENT_BINARY_DIR}/pixmaps.keramik
 DEPENDS genembed ${keramikPics}

)

As you can see genembed is also listed as a dependency, this means cmake knows that it has to build the executable genembed before executing this rule.

我不想設定 -DCMAKE_INSTALL_PREFIX 命令列參數。CMake 是否支援 KDEDIR 環境變數？

No. $KDEDIR is deprecated in KDE 4.

為什麼我會得到/usr/lib/qt4/include/QtCore/qstring.h:536: undefined reference to `QString::fromLatin1_helper(char const*, int)'之類的編譯錯誤？

如果你有舊版的 Qt 4 在 qt/lib 目錄，你必須刪除這些舊版（4.0.1）檔案。

我要怎麼讓 CMake 創建 noisy makefiles？我希望看到 make 過程執行的指令。

Pass the VERBOSE variable to make, i.e. % make VERBOSE=1 or % VERBOSE=1 make

For more details see the CMake wiki: Is there an option to produce more 'verbose' compiling?

產生的 Makefiles 中沒有 'make distclean' 標籤。我該如何才能清理包括 cache 檔案在內的所有檔案？

Simply remove the build directory, or just the contents of the build directory.

I've got fatal error LNK1104: cannot open file 'optimized.lib' under Windows/msvc (release with debug info build)

This is a problem with KDE's CMakeLists.txt and CMake 2.6.0 and 2.6.1, it will be fixed soon.

QT_*_LIBRARIES must not be used in your target_link_libraries() line of CMakeLists.txt. Use QT_*_LIBRARY instead. Otherwise the variable will look like this (example for QT_QTNETWORK_LIBRARY):

optimized;C:/kde4/lib/QtNetwork4.lib;debug;C:/kde4/lib/QtNetworkd4.lib ^^^^^^^^^

The first optimized part is translated by cmake to optimized.lib so we have got the cannot open file 'optimized.lib' error.

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