How to use cmake and vcpkg to import GLAD/GLFW3/ImGUI libraries on MacOS?

Question

My goal is to write a simple, portable application using ImGUI. I also want a platform-agnostic build experience using cmake, and vcpkg to install dependencies. I got the program built and running on my Windows machine, but it's failing on my Macbook (macOS Monterey 12.6).

This is my vcpkg.json:

{
    "name": "imguitest",
    "version": "1.0",
    "dependencies": [
        "glad",
        "glfw3",
        {
            "name": "imgui",
            "features": [ "glfw-binding", "opengl3-binding" ]
        }
    ]
}

This is my CMakeLists.txt:

cmake_minimum_required (VERSION 3.23)

project(ImGui-Test)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/bin)

add_executable(${PROJECT_NAME}
    src/main.cpp
)

find_package(glad CONFIG REQUIRED)
target_link_libraries(${PROJECT_NAME} PRIVATE glad::glad)

find_package(glfw3 CONFIG REQUIRED)
target_link_libraries(${PROJECT_NAME} PRIVATE glfw)

find_package(imgui CONFIG REQUIRED)
target_link_libraries(${PROJECT_NAME} PRIVATE imgui::imgui)

find_package(OpenGL REQUIRED)
target_link_libraries(${PROJECT_NAME} PRIVATE OpenGL::GL)

After running this:

# export VCPKG_DIR=/path/to/vcpkg/repo/
cmake -B ./build -S . "-DCMAKE_TOOLCHAIN_FILE=$VCPKG_DIR/scripts/buildsystems/vcpkg.cmake"

I get this error:

CMake Error at CMakeLists.txt:14 (find_package):
  Could not find a package configuration file provided by "glad" with any of
  the following names:

    gladConfig.cmake
    glad-config.cmake

  Add the installation prefix of "glad" to CMAKE_PREFIX_PATH or set
  "glad_DIR" to a directory containing one of the above files.  If "glad"
  provides a separate development package or SDK, be sure it has been
  installed.

Do I have to manually install GLAD package myself and set the path? I thought vcpkg would handle that for me. Please let me know if I'm misunderstanding something, as I'm new to modern cmake and vcpkg.

Answer 1

This fixed it: brew install pkg-config

I got more descriptive error messages after I deleted the build folder. This error message was hidden when configuring cmake with vscode, but was visible when doing it through zsh terminal.

Building glfw3[core]:arm64-osx...
warning: -- Using community triplet arm64-osx. This triplet configuration is not guaranteed to succeed.
-- [COMMUNITY] Loading triplet configuration from: /Users/munta/Dev/vcpkg/triplets/community/arm64-osx.cmake
-- Downloading https://github.com/glfw/glfw/archive/7482de6071d21db77a7236155da44c172a7f6c9e.tar.gz -> glfw-glfw-7482de6071d21db77a7236155da44c172a7f6c9e.tar.gz...
-- Extracting source /Users/munta/Dev/vcpkg/downloads/glfw-glfw-7482de6071d21db77a7236155da44c172a7f6c9e.tar.gz
-- Using source at /Users/munta/Dev/vcpkg/buildtrees/glfw3/src/172a7f6c9e-7678776297.clean
GLFW3 currently requires the following libraries from the system package manager:
    xinerama
    xcursor
    xorg
    libglu1-mesa
    pkg-config

These can be installed via brew install libxinerama-dev libxcursor-dev xorg-dev libglu1-mesa-dev pkg-config
-- Configuring arm64-osx
-- Building arm64-osx-dbg
-- Building arm64-osx-rel
-- Fixing pkgconfig file: /Users/munta/Dev/vcpkg/packages/glfw3_arm64-osx/lib/pkgconfig/glfw3.pc
CMake Error at scripts/cmake/vcpkg_find_acquire_program.cmake:619 (message):
  Could not find pkg-config.  Please install it via your package manager:

      brew install pkg-config
Call Stack (most recent call first):
  scripts/cmake/vcpkg_fixup_pkgconfig.cmake:151 (vcpkg_find_acquire_program)
  ports/glfw3/portfile.cmake:43 (vcpkg_fixup_pkgconfig)
  scripts/ports.cmake:147 (include)