Export glm as interface library for CMake 2.8.12 and newer #324
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Using INTERFACE library type defines header-only library and exports it using CMake packaging system. Version file is also created and policy of version matching is currently set to AnyNewerVersion.
This gives build equivalency for external_project_add / system-wide installation, and removes the need to call include_directories in clients CMakeLists.txt.
For details see:
Usage:
For backwards compatibility glmConfig.cmake sets "GLM_INCLUDE_DIRS".