如何解决我如何在 CMAKE 中链接 GLFW 和 Dear ImGUI
最近几天我在使用 CMake，一切正常，只是我找不到将 ImGUI 与 GLFW 链接的方法
一切都是从源代码构建的
这里是错误：
Consolidate compiler generated dependencies of target glad
[ 2%] Built target glad
Consolidate compiler generated dependencies of target stb
[ 5%] Built target stb
Consolidate compiler generated dependencies of target glfw
[ 29%] Built target glfw
Consolidate compiler generated dependencies of target imgui
[ 30%] Building CXX object CMakeFiles/imgui.dir/lib/imgui/imgui.cpp.o
[ 31%] Building CXX object CMakeFiles/imgui.dir/lib/imgui/imgui_demo.cpp.o
[ 33%] Building CXX object CMakeFiles/imgui.dir/lib/imgui/imgui_draw.cpp.o
[ 34%] Building CXX object CMakeFiles/imgui.dir/lib/imgui/imgui_tables.cpp.o
[ 36%] Building CXX object CMakeFiles/imgui.dir/lib/imgui/imgui_widgets.cpp.o
[ 37%] Building CXX object CMakeFiles/imgui.dir/lib/imgui/imgui_impl_glfw.cpp.o
/home/erik/Workspace/LearnopenGL/lib/imgui/imgui_impl_glfw.cpp:45:10: Fatal error: GLFW/glfw3.h: No such file or directory
45 | #include <GLFW/glfw3.h>
| ^~~~~~~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/imgui.dir/build.make:146: CMakeFiles/imgui.dir/lib/imgui/imgui_impl_glfw.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:228: CMakeFiles/imgui.dir/all] Error 2
make: *** [Makefile:156: all] Error 2
这是我的 CMakeLists.txt :
cmake_minimum_required(VERSION 3.1)
project(LearnopenGL)
set(SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/source")
set(LIB_DIR "${CMAKE_CURRENT_SOURCE_DIR}/lib")
set(SOURCES "${SRC_DIR}/Main.cpp"
)
add_executable(${PROJECT_NAME} ${SOURCES})
target_include_directories(${PROJECT_NAME} PRIVATE "${SRC_DIR}")
set_property(TARGET ${PROJECT_NAME} PROPERTY CXX_STANDARD 11)
# GLFW
set(GLFW_DIR "${LIB_DIR}/glfw")
set(GLFW_BUILD_EXAMPLES OFF CACHE INTERNAL "Build the GLFW example programs")
set(GLFW_BUILD_TESTS OFF CACHE INTERNAL "Build the GLFW test programs")
set(GLFW_BUILD_DOCS OFF CACHE INTERNAL "Build the GLFW documentation")
set(GLFW_INSTALL OFF CACHE INTERNAL "Generate installation target")
add_subdirectory("${GLFW_DIR}")
target_link_libraries(${PROJECT_NAME} "glfw" "${GLFW_LIBRARIES}")
target_include_directories(${PROJECT_NAME} PRIVATE "${GLFW_DIR}/include")
target_compile_deFinitions(${PROJECT_NAME} PRIVATE "GLFW_INCLUDE_NONE")
# Glad
set(GLAD_DIR "${LIB_DIR}/glad")
add_library("glad" "${GLAD_DIR}/src/glad.c")
target_include_directories("glad" PRIVATE "${GLAD_DIR}/include")
target_include_directories(${PROJECT_NAME} PRIVATE "${GLAD_DIR}/include")
target_link_libraries(${PROJECT_NAME} "glad" "${CMAKE_DL_LIBS}")
# GLM
set(GLM_DIR "${LIB_DIR}/glm")
add_subdirectory(${GLM_DIR})
target_link_libraries(${PROJECT_NAME} "glm")
# STB
set(STB_DIR "${LIB_DIR}/stb")
add_library("stb" "${STB_DIR}/src/stb_image.cpp")
target_include_directories("stb" PRIVATE "${STB_DIR}/include")
target_include_directories(${PROJECT_NAME} PRIVATE "${STB_DIR}/include")
target_link_libraries(${PROJECT_NAME} "stb" "${CMAKE_DL_LIBS}")
# Freetype
set(FREETYPE_DIR "${LIB_DIR}/freetype")
add_subdirectory("${FREETYPE_DIR}")
target_link_libraries(${PROJECT_NAME} "${FREETYPE_LIBRARIES}")
target_include_directories(${PROJECT_NAME} PRIVATE "${FREETYPE_DIR}/include")
# ImGUI
set(IMGUI_DIR "${LIB_DIR}/imgui")
add_library("imgui" "${IMGUI_DIR}/imgui.cpp"
"${IMGUI_DIR}/imgui_demo.cpp"
"${IMGUI_DIR}/imgui_draw.cpp"
"${IMGUI_DIR}/imgui_tables.cpp"
"${IMGUI_DIR}/imgui_widgets.cpp"
"${IMGUI_DIR}/imgui_impl_glfw.cpp"
"${IMGUI_DIR}/imgui_impl_opengl3.cpp")
target_include_directories("imgui" PRIVATE "${IMGUI_DIR}")
target_include_directories(${PROJECT_NAME} PRIVATE "${IMGUI_DIR}")
target_link_libraries(${PROJECT_NAME} "imgui" "${CMAKE_DL_LIBS}")
这是我的文件夹结构
1. build
2. lib
- freetype
- glad
- glfw
- glm
- imgui
- stb
3. source
- Main.cpp
4. CMakeLists.txt
这是我的问题：我如何告诉 imgui glfw 已经在这里并且他可以使用它？
提前致谢
解决方法
您的构建应该只包含以下内容：
cmake_minimum_required(VERSION 3.20)
project(LearnOpenGL)
## Find dependencies
find_package(glfw3 REQUIRED)
find_package(glad REQUIRED)
find_package(glm REQUIRED)
find_package(freetype REQUIRED)
find_package(imgui REQUIRED)
# stb does not have a CMake build,but is header-only
find_path(STB_INCLUDE_DIRS "stb.h")
## Create main executable
add_executable(main source/Main.cpp)
target_include_directories(main
PRIVATE
${STB_INCLUDE_DIRS}
"${CMAKE_CURRENT_LIST_DIR}/source"
)
target_link_libraries(
main
PRIVATE
freetype
glfw
glad::glad
glm::glm
imgui::imgui
)
如果您没有使用 CMake 3.20，(a) 您应该，但是 (b) 您可以尝试使用早期版本。但是永远把一个版本低于你测试的版本。 CMake 只向后兼容，不向前兼容。
如果你只需要 freetype 作为 imgui 的依赖，那么你可以在 CMakeLists.txt 中删除对它的引用。
要构建它，您将希望使用 vcpkg。为此，在您的 CMakeLists.txt 旁边创建一个名为 vcpkg.json 的文件，其中包含以下内容：
{
"name": "learn-opengl","version": "0.1.0","dependencies": [
"glfw3","glad","glm","freetype","stb",{
"name": "imgui","features": ["freetype","glfw-binding","opengl3-glad-binding"]
}
]
}
这只是告诉 vcpkg 您想要哪些依赖项，以及您想要使用 imgui 支持和 freetype 绑定构建的 glfw。
然后你只需要运行三个命令。
$ git clone https://github.com/microsoft/vcpkg.git
$ cmake -S . -B build -DCMAKE_BUILD_TYPE=Release \
-DCMAKE_TOOLCHAIN_FILE=$PWD/vcpkg/scripts/buildsystems/vcpkg.cmake
$ cmake --build build
这里唯一可能出乎意料的是设置 CMAKE_TOOLCHAIN_FILE，这只是告诉 CMake 使用 vcpkg。第一次运行时，vcpkg 将下载您的依赖项、构建它们、将它们缓存在 ~/.cache/vcpkg 中并将它们安装到您的构建文件夹中。后续运行将只构建您的代码。
这个序列成功地在我的 Ubuntu 20.04 LTS 机器上为我构建了你的代码。
为了简化此操作，请考虑在您的根目录中创建一个 CMakePresets.json 文件，其中包含以下内容：
{
"version": 2,"cmakeMinimumRequired": {
"major": 3,"minor": 20,"patch": 0
},"configurePresets": [
{
"name": "default","displayName": "Default Config","description": "Default build using Make and vcpkg","generator": "Unix Makefiles","binaryDir": "${sourceDir}/build","cacheVariables": {
"CMAKE_BUILD_TYPE": "Release","CMAKE_TOOLCHAIN_FILE": "${sourceDir}/vcpkg/scripts/buildsystems/vcpkg.cmake"
}
},{
"name": "default-msvc","displayName": "Default MSVC","description": "Default build using Visual Studio and vcpkg","generator": "Visual Studio 16 2019","cacheVariables": {
"CMAKE_TOOLCHAIN_FILE": "${sourceDir}/vcpkg/scripts/buildsystems/vcpkg.cmake"
}
}
]
}
然后你可以只运行 cmake --preset=default 而不是上面更长的命令。
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