minetest/cmake/Modules/MinetestFindIrrlichtHeaders.cmake

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# Locate IrrlichtMt headers on system.
find_path(IRRLICHT_INCLUDE_DIR NAMES irrlicht.h
DOC "Path to the directory with IrrlichtMt includes"
PATHS
/usr/local/include/irrlichtmt
/usr/include/irrlichtmt
/system/develop/headers/irrlichtmt #Haiku
PATH_SUFFIXES "include/irrlichtmt"
)
# Handholding for users
if(IRRLICHT_INCLUDE_DIR AND (NOT IS_DIRECTORY "${IRRLICHT_INCLUDE_DIR}" OR
NOT EXISTS "${IRRLICHT_INCLUDE_DIR}/irrlicht.h"))
message(WARNING "IRRLICHT_INCLUDE_DIR was set to ${IRRLICHT_INCLUDE_DIR} "
"but irrlicht.h does not exist inside. The path will not be used.")
unset(IRRLICHT_INCLUDE_DIR CACHE)
endif()