CMake链接器错误“对...的未定义引用”

Question

我遇到了无法修复的undefined reference to x个链接器错误。

我不了解发生了什么事，因为我正在与引擎链接，但它似乎无法正常工作。我还尝试将其添加为依赖项，因此也无法解决。有人知道我在做什么错吗？

如果您想窥探所有内容，请访问以下仓库： https://github.com/WinteryFox/VixenEngine

这是我遇到的错误；

CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x8a): undefined reference to `graphics::Window::Window(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int, int)'
CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x19f): undefined reference to `graphics::MasterRender::MasterRender()'
CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x230): undefined reference to `graphics::MasterRender::addEntity(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, glm::vec<3, float, (glm::qualifier)0>, glm::vec<3, float, (glm::qualifier)0>, float)'
CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x281): undefined reference to `graphics::MasterRender::addPointTemperatureLight(glm::vec<3, float, (glm::qualifier)0> const&, unsigned int, float, float, float)'
CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x28e): undefined reference to `graphics::MasterRender::addTerrain(int, int)'
CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x29e): undefined reference to `graphics::MasterRender::addTerrain(int, int)'
CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x2af): undefined reference to `graphics::MasterRender::addTerrain(int, int)'
CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x2bf): undefined reference to `graphics::MasterRender::addTerrain(int, int)'
CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x2cf): undefined reference to `graphics::MasterRender::render(graphics::Window*, input::Camera*)'
CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x2d7): undefined reference to `graphics::Window::shouldClose() const'
CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x2e3): undefined reference to `graphics::MasterRender::~MasterRender()'
CMakeFiles\test.dir/objects.a(main.cpp.obj):main.cpp:(.text.startup+0x305): undefined reference to `graphics::Window::~Window()'
collect2.exe: error: ld returned 1 exit status
mingw32-make.exe[3]: *** [test\CMakeFiles\test.dir\build.make:94: bin/test.exe] Error 1
mingw32-make.exe[2]: *** [CMakeFiles\Makefile2:1077: test/CMakeFiles/test.dir/all] Error 2
mingw32-make.exe[1]: *** [CMakeFiles\Makefile2:1089: test/CMakeFiles/test.dir/rule] Error 2
mingw32-make.exe: *** [Makefile:445: test] Error 2

这是我的3个CMakeLists

根CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
project(VixenEngine)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
if (WIN32)
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libstdc++ -static-libgcc")
endif ()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")

set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)

set(CMAKE_SHARED_LIBRARY_PREFIX "")
set(CMAKE_SHARED_MODULE_PREFIX "")
set(CMAKE_STATIC_LIBRARY_PREFIX "")

set(SKIP_INSTALL_ALL ON)

option(VIXEN_BUILD_TEST "Build the engine test executable" ON)

#---- BUILD ENGINE ----

add_subdirectory(${CMAKE_SOURCE_DIR}/engine)

#---- BUILD TEST ----

if (VIXEN_BUILD_TEST)
    add_subdirectory(${CMAKE_SOURCE_DIR}/test)
endif(VIXEN_BUILD_TEST)

引擎目标CMakeLists.txt

project(engine)

set(CONTRIB "${CMAKE_SOURCE_DIR}/engine/contrib")

# ---- BUILD GLEW ----

set(GLEW "${CONTRIB}/glew")

add_subdirectory("${GLEW}/build/cmake")

# ---- BUILD GLFW ----

set(GLFW "${CONTRIB}/glfw")

set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "")
set(GLFW_BUILD_TESTS OFF CACHE BOOL "")
set(GLFW_BUILD_DOCS OFF CACHE BOOL "")
set(GLFW_INSTALL OFF CACHE BOOL "")
set(BUILD_TESTING OFF CACHE BOOL "")
set(BUILD_UTILS OFF CACHE BOOL "")

add_subdirectory("${GLFW}")

# ---- BUILD ZLIB ----

set(ZLIB "${CONTRIB}/zlib")

add_subdirectory("${ZLIB}")

set(ZLIB_INCLUDE_DIR "${ZLIB}" "${CMAKE_BINARY_DIR}/engine/contrib/zlib" CACHE PATH "")
set(ZLIB_LIBRARY zlib CACHE STRING "")

# ---- BUILD LIBPNG ----

set(LIBPNG "${CONTRIB}/libpng")

set(PNG_TESTS OFF CACHE BOOL "")
set(PNG_SHARED ON CACHE BOOL "")
set(PNG_STATIC OFF CACHE BOOL "")

add_subdirectory("${LIBPNG}")

set(PNG_PNG_INCLUDE_DIR "${LIBPNG}" "${CMAKE_BINARY_DIR}/engine/contrib/libpng" CACHE PATH "")
set(PNG_LIBRARY png CACHE STRING "")

# ---- BUILD FREETYPE ----

set(FREETYPE "${CONTRIB}/freetype")

set(FT_WITH_PNG ON CACHE BOOL "")
set(FT_WITH_ZLIB ON CACHE BOOL "")

add_subdirectory("${FREETYPE}")

# ---- BUILD ASSIMP ----

set(ASSIMP "${CONTRIB}/assimp")

set(ASSIMP_BUILD_ASSIMP_TOOLS OFF CACHE BOOL "")
set(ASSIMP_BUILD_SAMPLES OFF CACHE BOOL "")
set(ASSIMP_BUILD_TESTS OFF CACHE BOOL "")
set(ASSIMP_NO_EXPORT ON CACHE BOOL "")
set(ASSIMP_BUILD_COLLADA_IMPORTER ON CACHE BOOL "")
set(ASSIMP_BUILD_ALL_IMPORTERS_BY_DEFAULT OFF CACHE BOOL "")

add_subdirectory("${ASSIMP}")

# ---- BUILD ENGINE ----

add_library(engine SHARED Window.cpp Window.h Camera.cpp Camera.h shaders/Shader.cpp shaders/Shader.h shaders/Phong.h Mesh.cpp Mesh.h render/EntityRender.cpp render/EntityRender.h Entity.cpp Entity.h Loader.cpp Loader.h Light.cpp Light.h Player.cpp Player.h Model.cpp Model.h Chunk.h Material.h render/EntityRender.cpp render/EntityRender.h Generator.cpp Generator.h render/TerrainRender.cpp render/TerrainRender.h Image.h Texture.h shaders/Phong.cpp shaders/GuiShader.cpp shaders/GuiShader.h font/Font.cpp font/Font.h font/Text.cpp font/Text.h render/FontRender.cpp render/FontRender.h font/Character.h render/MasterRender.cpp render/MasterRender.h shapes/Shapes.h)

set(OpenGL_GL_PREFERENCE GLVND)
find_package(OpenGL REQUIRED)

add_dependencies(engine png freetype assimp zlib glfw glew)

target_include_directories(engine PUBLIC ${LIBPNG} ${FREETYPE}/include ${CMAKE_BINARY_DIR}/engine/contrib/assimp/include ${ASSIMP}/include ${LIBPNG} ${GLEW}/include ${CMAKE_SOURCE_DIR}/engine/contrib/glm)

target_link_libraries(engine -static winpthread -dynamic)
target_link_libraries(engine png freetype assimp zlib glfw glew ${OPENGL_LIBRARY})

测试可执行文件CMakeLists.txt

#---- BUILD TEST ----

project(test)

add_executable(test main.cpp)
add_dependencies(test engine)

target_include_directories(test PUBLIC ${CMAKE_SOURCE_DIR}/engine)
target_link_libraries(test engine)

if (WIN32)
    target_link_libraries(test gdi32 user32 kernel32)
endif (WIN32)