OSX上的GLFW + Vulkan

Question

我正在为我的一个项目设置GLFW和Vulkan。对于Vulkan，我使用MoltenVk来获取Vulkan compat和GLFW来创建窗口。我使用的集成开发环境是使用CMake系统的CLion。

从github的一些问题来看，似乎有人支持这种设置，但没有人提到它是如何实现的。

GLFW是通过homebrew和MoltenVK手动安装的，方法是将MoltenVK和vulkan文件夹添加到usr/local/include，并将MacOS文件夹的内容添加到usr/local/lib (尽管我非常确定MoltenVK.framework不应该在那里)。

在这一点上，Clion可以看到GLFW和Vulkan头，但我仍然需要将它们正确地链接起来。

完整的CMakeLists.txt文件现在是这样：

cmake_minimum_required(VERSION 3.8)
project(VulkanEngine)

#set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} “${CMAKE_SOURCE_DIR}/cmake/Modules”)

set(CMAKE_CXX_STANDARD 17)

set(SOURCE_FILES src/main.cpp)
add_executable(VulkanEngine ${SOURCE_FILES})

#Finding and linking GLFW3

find_package(glfw3 3.2 REQUIRED)
if (glfw3_FOUND)
    include_directories(${glfw3_INCLUDE_DIRS})
    target_link_libraries (VulkanEngine ${glfw3_LIBRARIES})
endif (glfw3_FOUND)

#Finding and linking Vulkan

find_package (Vulkan)
if (Vulkan_FOUND)
    include_directories(${Vulkan_INCLUDE_DIRS})
    target_link_libraries (VulkanEngine ${Vulkan_LIBRARIES})
endif (Vulkan_FOUND)

当cmake项目重新加载时，控制台会提示以下信息：

-- Could NOT find Vulkan (missing:  Vulkan_LIBRARY) 
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/mtesseract/dev/cpp/VulkanEngine/cmake-build-debug

对我来说，这表明已经找到并链接了GLFW，但当我尝试为GLFW构建"hello world“时，我得到了以下消息：

Undefined symbols for architecture x86_64:
  "_glfwInit", referenced from:
      _main in main.cpp.o

我从GLFW github页面https://git.io/v5ggN获得了FindVulkan.cmake，因为它支持MoltenVK，但我不确定它是否会被CMake采用。(我将文件放在(Projectroot)/cmake/modules/中)

在这一点上，我不知道为什么事情没有正确链接，所以感谢你的帮助。

Answer 1

我已经找到了一个解决方案，至少在某种程度上看起来是有效的。在这一点上，我有另一个问题要解决(GLFW似乎没有注意到MoltenVK的存在)。

到目前为止，这个过程如下(可以在我的github页面(github.com/mtesseracttech/VulkanEngine)上找到)：

Vulkan + GLFW + GLM Setup Process with CMake and Package Managers

Windows:

Preparation:
Create CLion Application Project 
Install MSYS2 (Cygwin-like package manager that includes a windows port of Arch's PacMan)
Install LunarG VK SDK
Download FindVulkan.cmake from GFLW's Github (it includes a path for MoltenVK(for OSX Later)) and put it in (proj_root/cmake/modules)

MSYS2 Commands:

$ pacman -Su //Updates pacman
$ pacman -Ss {packageName} //Is used for searching for exact package names

Installed Packages through msys2:

$ pacman -S mingw-w64-x86_64-toolchain //Installs the CLion toolchain that includes CMake, Make, GCC, etc.
$ pacman -S mingw-w64-x86_64-glfw //Installs GLFW
$ pacman -S mingw-w64-x86_64-glm //Installs GLM
$ pacman -S mingw-w64-x86_64-vulkan //Vulkan can also be installed through this method, but I went with LunarG

Enter the following in the CMakeLists.txt file in the root of the project:

######################################################################################

cmake_minimum_required(VERSION 3.8)
project(VulkanEngine)

set(CMAKE_CXX_STANDARD 17)

set(SOURCE_FILES src/main.cpp)
add_executable(VulkanEngine ${SOURCE_FILES})

#Setting up PkgConfig

find_package(PkgConfig REQUIRED)

#Finding and linking GLFW3

pkg_search_module(GLFW3 3.2 REQUIRED glfw3)
if(GLFW3_FOUND)
    message(STATUS "Found GLFW, Including and Linking now")
    include_directories(${GLFW3_INCLUDE_DIRS})
    target_link_libraries(VulkanEngine ${GLFW3_STATIC_LIBRARIES})
endif(GLFW3_FOUND)

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/modules/")

#Finding and linking Vulkan

find_package (Vulkan)
if (VULKAN_FOUND)
    message(STATUS "Found Vulkan, Including and Linking now")
    include_directories(${VULKAN_INCLUDE_DIR})
    target_link_libraries (VulkanEngine ${VULKAN_LIBRARY})
endif (VULKAN_FOUND)

######################################################################################




OSX:

Preparation

Create CLion Application Project 
Install HomeBrew (package manager)
Download MoltenVK
Download FindVulkan.cmake from GFLW's Github (it includes a path for MoltenVK(for OSX Later)) and put it in (proj_root/cmake/modules)

Homebrew:
brew update //Updates homebrew
brew install glfw //Installs GLFW
brew install glm //Installs GLM

MoltenVK:
Place MoltenVK/macOS's contents into /usr/local/lib
Place MoltenVK/macOS/MoltenVK.framework/headers's contents into /usr/local/inc/MoltenVK

CMake: 
Same as on windows, but in the FindVulkan.cmake file, add at the very end of the elseif(APPLE) block the line:
set(VULKAN_INCLUDE_DIR "/usr/local/include/MoltenVK")
This is not a pretty or flexible solution, but for now it will do.

我很确定这个解决方案并不理想，因为GLFW不会用这个策略跟上MoltenVK，但至少事情是可以编译的，所以我认为这是一种进步。

Answer 2

您的问题似乎是您还没有定义VULKAN_SDK变量。确保将其指向SDK中的/lib & /include的父文件夹，FindVulkan应该可以工作

VULKAN_SDK=/opt/vulkan/x86_64 cmake.