cmake - 使用 CMAKE 构建 GLFW3 应用程序 - GLFW LIBRARIES 未设置

Question

我正在尝试使用 glfw3 构建一个小项目，但无论我做什么，我都无法让 pkgconfig 设置 GLFW_LIBRARIES。

这是我的 CMakeList.txt

cmake_minimum_required(VERSION 3.3)
project(LearnGLSL)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

if (CMAKE_BUILD_TYPE STREQUAL "")
    set(CMAKE_BUILD_TYPE Debug)
endif()


if(CMAKE_BUILD_TYPE STREQUAL "Debug")
    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_SOURCE_DIR}/build/debug")
    set(PROJECT_BINARY_DIR "${CMAKE_SOURCE_DIR}/build/debug")
endif(CMAKE_BUILD_TYPE STREQUAL "Debug")


file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR})
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})


find_package(OpenGL REQUIRED)

find_package(PkgConfig REQUIRED)
pkg_check_modules(GLFW REQUIRED glfw3)



include_directories(
        ${OPENGL_INCLUDE_DIR}
        ${GLFW_INCLUDE_DIRS}
)


set(SOURCE_FILES main.cpp gl_core_4_3.cpp)

message(WARNING "${GLFW_LIBRARIES}")

add_executable(LearnGLSL ${SOURCE_FILES})
target_link_libraries(LearnGLSL ${OPENGL_gl_LIBRARY} ${GLFW_LIBRARIES})


add_custom_command(TARGET LearnGLSL  POST_BUILD
        COMMAND ${CMAKE_COMMAND} -E copy_directory
        ${CMAKE_SOURCE_DIR}/assets
        ${PROJECT_BINARY_DIR}
        COMMENT "Copy resources to build tree")

这是安装glfw3的地方

-- Installing: /usr/local/include/GLFW
-- Installing: /usr/local/include/GLFW/glfw3native.h
-- Installing: /usr/local/include/GLFW/glfw3.h
-- Installing: /usr/local/lib/cmake/glfw/glfw3Config.cmake
-- Installing: /usr/local/lib/cmake/glfw/glfw3ConfigVersion.cmake
-- Installing: /usr/local/lib/cmake/glfw/glfwTargets.cmake
-- Installing: /usr/local/lib/cmake/glfw/glfwTargets-noconfig.cmake
-- Installing: /usr/local/lib/pkgconfig/glfw3.pc
-- Installing: /usr/local/lib/libglfw3.a

我将是第一个承认我对 CMAKE 不太满意的人，但这似乎很简单，而且我已经尽我所能在谷歌上找到了。也许它是我没有注意到的错字。感谢任何帮助谢谢

哦，我忘了提到我在构建这个项目时得到了对 glfw 函数的 undefined reference 。我认为这是 GLFW_LIBRARIES 没有正确设置的结果。

Answer 1

我不知道如何使用 pkgconfig 找到 GLFW，但我认为在这种情况下您不需要 pkgconfig。由于 GLFW 本身是使用 CMake 构建的，因此它应该安装一个本地 CMake 配置模块，它确实如此。

嗯，差不多。从 v3.1.2 开始，官方 GLFW CMake 配置模块支持有点问题。相反，请使用 shaxbee's fork或 adasworks fork (基于 shaxbee 但更新)

有了那个 GLFW，你只需要找到 2 行:

find_package(glfw3 REQUIRED)
...
target_link_libraries(LearnGLSL ... glfw)

我还在您的 CMakeLists.txt 中发现了其他一些问题，因此我重复了整个脚本，并进行了修改:

cmake_minimum_required(VERSION 3.3)
project(LearnGLSL)

set(CMAKE_CXX_STANDARD 11) # no explicit compiler flags if possible

# don't read CMAKE_BUILD_TYPE, it has no meaning with multiconfig
# generators
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG "${CMAKE_SOURCE_DIR}/build/debug")

# PROJECT_BINARY_DIR should not be set at all
# You establish the BINARY_DIR with the initial cmake command
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR})

find_package(OpenGL REQUIRED)
find_package(glfw3 REQUIRED)

include_directories(${OPENGL_INCLUDE_DIR})

add_executable(LearnGLSL main.cpp gl_core_4_3.cpp)
target_link_libraries(LearnGLSL ${OPENGL_gl_LIBRARY} glfw)

add_custom_command(TARGET LearnGLSL POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E copy_directory
    ${CMAKE_SOURCE_DIR}/assets
    ${PROJECT_BINARY_DIR}
    COMMENT "Copy resources to build tree")