Use glad as a static lib with CMake FetchContent

CMakeLists.txt

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# https://github.com/Dav1dde/glad/issues/397#issue-1463640603
# This doesn't work out of the box with conflicting targets, forcing shared libs, etc.

set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE) # Ugly way to force static glad build

# Fetch GLAD from GitHub
FetchContent_Declare(glad_src
	GIT_REPOSITORY https://github.com/Dav1dde/glad.git
	GIT_TAG v0.1.36)
set(GLAD_PROFILE "core"	CACHE STRING "OpenGL profile")
set(GLAD_GENERATOR "c"	CACHE STRING "Language to generate the binding for")
FetchContent_MakeAvailable(glad_src)

set(BUILD_SHARED_LIBS ON CACHE BOOL "" FORCE) # Ugly way to force static glad build

set_property(TARGET glad PROPERTY POSITION_INDEPENDENT_CODE ON) # fPIC

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# Now this works fine
target_link_libraries(${PROJECT_NAME}
    PRIVATE
        glad
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