gcc - CMake链接共享库-找不到lOgreMain

Question

我已经建立了自己的 Ogre3D http://ogre3d.org二进制文件，现在我想将我在 Qt 中的项目链接到它们(我使用 CMake 作为我的构建工具)。这是我的CMakeLists.txt文件 :

project(ogre_face_test)
cmake_minimum_required(VERSION 2.8)
aux_source_directory(. SRC_LIST)
add_executable(${PROJECT_NAME} ${SRC_LIST})

include_directories( "/home/XXX/programming/SDKs/OGRE_1.8.1_BUILD/include" "." )

link_directories("/home/XXX/programming/SDKs/OGRE_1.8.1_BUILD/lib")
target_link_libraries( ogre_face_test "OgreMain" )

在 .../BUILD/lib目录我有这样的文件:libOgreMain.so , libOgreMain.so.1.8.1等等。

我在 Qt Creator 中链接时收到此错误:

/usr/bin/cmake -H/home/XXX/programming/c++/ogre_face_sample/ogre_face_test -B/home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build --check-build-system CMakeFiles/Makefile.cmake 0
/usr/bin/cmake -E cmake_progress_start /home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build/CMakeFiles /home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build/CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make[1]: Entering directory `/home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build'
make -f CMakeFiles/ogre_face_test.dir/build.make CMakeFiles/ogre_face_test.dir/depend
make[2]: Entering directory `/home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build'
cd /home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/XXX/programming/c++/ogre_face_sample/ogre_face_test /home/XXX/programming/c++/ogre_face_sample/ogre_face_test /home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build /home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build /home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build/CMakeFiles/ogre_face_test.dir/DependInfo.cmake --color=
make[2]: Leaving directory `/home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build'
make -f CMakeFiles/ogre_face_test.dir/build.make CMakeFiles/ogre_face_test.dir/build
make[2]: Entering directory `/home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build'
Linking CXX executable ogre_face_test
/usr/bin/cmake -E cmake_link_script CMakeFiles/ogre_face_test.dir/link.txt --verbose=1
/usr/bin/c++       CMakeFiles/ogre_face_test.dir/main.cpp.o CMakeFiles/ogre_face_test.dir/FacialAnimation.cpp.o  -o ogre_face_test -rdynamic -lOgreMain 
/usr/bin/ld: cannot find -lOgreMain
collect2: error: ld returned 1 exit status
make[2]: *** [ogre_face_test] Error 1
make[2]: Leaving directory `/home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build'
make[1]: *** [CMakeFiles/ogre_face_test.dir/all] Error 2
make[1]: Leaving directory `/home/XXX/programming/c++/ogre_face_sample/ogre_face_test-build'
make: *** [all] Error 2

编辑

另一方面，如果我使用 qmake而不是 CMake使用此文件:

TARGET = qt_test_1
TEMPLATE = app

SOURCES += main.cpp\
        FacialAnimation.cpp

HEADERS  += FacialAnimation.h

INCLUDEPATH += /usr/include\
            /home/monkey/programming/SDKs/OGRE_1.8.1_BUILD/include
DEPENDPATH += /usr/include
LIBS += -L/home/monkey/programming/SDKs/OGRE_1.8.1_BUILD/lib -lOgreMain

它链接得很好。

Answer 1

CMake 文档说:

• link_directories: Specify directories in which the linker will look for libraries.

  link_directories(directory1 directory2 ...)
  

  Specify the paths in which the linker should search for libraries. The command will apply only to targets created after it is called. For historical reasons, relative paths given to this command are passed to the linker unchanged (unlike many CMake commands which interpret them relative to the current source directory).

(强调我的)所以你必须在调用 add_executable 之前设置目录.