[SOLVED] MacOS cmake fails to find_package(OpenGL)

Issue

At some point cmake stopped finding OpenGL with this error message

Could NOT find OpenGL (missing: OPENGL_gl_LIBRARY OPENGL_INCLUDE_DIR)

Then I set CMAKE_FIND_DEBUG_MODE to true, and then I realized that cmake is not looking in the frameworks folder

message("${CMAKE_FRAMEWORK_PATH}") prints empty string

After setting CMAKE_FRAMEWORK_PATH to /System/Library/Frameworks cmake still fails to find OpenGL

Could NOT find OpenGL (missing: OPENGL_INCLUDE_DIR)

Therefore, I have two questions:

1. Why CMAKE_FRAMEWORK_PATH is an empty string (should it be?)
2. Why CMake does not find OpenGL headers even if I specify the frameworks folder

Solution

The problem was that I was trying to call find_package before project in my CMakeLists.txt

reordering lines of code in this way:

project("name")
find_package(OpenGL REQUIRED)

solved my problem

Answered By - kin4stat

Answer Checked By - Timothy Miller (WPSolving Admin)