[英]Building library with cmake
我為打擾你們而道歉,但我對cmake有一點編譯問題。
我有一個CMakeLists.txt文件,我用它來構建一個測試可執行文件和一個共享庫。 它們都依賴於另一個庫(SFML)。
我在MinGW的窗口上使用cmake。
我知道我正在構建的lib的名稱與sfml有點混淆,但它應該是一個SFML包裝器,所以,我找不到更好的名字!
這里是CMakeLists.txt
cmake_minimum_required(VERSION 2.6)
project(projectName)
set(EXECUTABLE_NAME testSFML)
set(LIBRARY_NAME SFMLwindow)
set(EXECUTABLE_OUTPUT_PATH ${CMAKE_CURRENT_SOURCE_DIR}/bin/)
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include /
${CMAKE_CURRENT_SOURCE_DIR}/../../include
)
link_directories(${CMAKE_CURRENT_SOURCE_DIR}/../../lib/)
file(
GLOB_RECURSE
SRC_FILES
src/*
)
file(
GLOB_RECURSE
INCLUDE_FILES
include/*
)
add_executable(
${EXECUTABLE_NAME}
main.cpp
${SRC_FILES}
${INCLUDE_FILES}
)
target_link_libraries(
${EXECUTABLE_NAME}
sfml-main
sfml-system
sfml-window
)
add_library(
${LIBRARY_NAME}
SHARED
${SRC_FILES}
)
我在終端得到了什么:
"C:\MinGW\bin\mingw32-make.exe"
-- Configuring done
-- Generating done
-- Build files have been written to: C:/Users/iksemel/docs/WorkBench/programming/projets/TestSFML/cmake
Linking CXX shared library libSFMLwindow.dll
Creating library file: libSFMLwindow.dll.a
CMakeFiles\SFMLwindow.dir/objects.a(SFMLWindow.cpp.obj):SFMLWindow.cpp:(.text+0x59):undefined reference to `_imp___ZN2sf9VideoModeC1Ejjj'
CMakeFiles\SFMLwindow.dir/objects.a(SFMLWindow.cpp.obj):SFMLWindow.cpp:(.text+0xda): undefined reference to `_imp___ZN2sf6WindowC1ENS_9VideoModeERKSsjRKNS_15ContextSettingsE'
CMakeFiles\SFMLwindow.dir/objects.a(SFMLWindow.cpp.obj):SFMLWindow.cpp:(.text+0x163): undefined reference to `_imp___ZN2sf6Window5closeEv'
CMakeFiles\SFMLwindow.dir/objects.a(SFMLWindow.cpp.obj):SFMLWindow.cpp:(.text+0x1bd): undefined reference to `_imp___ZN2sf6Window9pollEventERNS_5EventE'
CMakeFiles\SFMLwindow.dir/objects.a(SFMLWindow.cpp.obj):SFMLWindow.cpp:(.text+0x1d8): undefined reference to `_imp___ZN2sf6Window7displayEv'
collect2: ld a retourné 1 code d'état d'exécution
mingw32-make.exe[2]: *** [libSFMLwindow.dll] Error 1
mingw32-make.exe[1]: *** [CMakeFiles/SFMLwindow.dir/all] Error 2
mingw32-make.exe: *** [all] Error 2
如果有人知道發生了什么,我會非常感激!
猜測,您的SFMLwindow
庫需要鏈接到部分或全部sfml-main,sfml-system,sfml-window。
您可以嘗試將CMakeLists.txt的結尾更改為:
add_library(
${LIBRARY_NAME}
SHARED
${SRC_FILES}
${INCLUDE_FILES}
)
add_executable(
${EXECUTABLE_NAME}
main.cpp
)
target_link_libraries(
${LIBRARY_NAME}
sfml-main
sfml-system
sfml-window
)
target_link_libraries(
${EXECUTABLE_NAME}
${LIBRARY_NAME}
)
file(GLOB_RECURSE...
, file(GLOB_RECURSE...
通常file(GLOB_RECURSE...
收集源列表的方法。從file
的文檔:
我們不建議使用GLOB從源樹中收集源文件列表。 如果在添加或刪除源時沒有更改CMakeLists.txt文件,則生成的構建系統無法知道何時要求CMake重新生成。
此外,在這種情況下, find_library
應該優先於link_directories
。 來自link_directories
的文檔:
請注意,此命令很少需要。 find_package()和find_library()返回的庫位置是絕對路徑。 將這些絕對庫文件路徑直接傳遞給target_link_libraries()命令。 CMake將確保鏈接器找到它們。
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