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# Locate Irrlicht or IrrlichtMt headers on system.
foreach(libname IN ITEMS IrrlichtMt Irrlicht)
string(TOLOWER "${libname}" libname2)
find_path(IRRLICHT_INCLUDE_DIR NAMES irrlicht.h
DOC "Path to the directory with IrrlichtMt includes"
PATHS
/usr/local/include/${libname2}
/usr/include/${libname2}
/system/develop/headers/${libname2} #Haiku
PATH_SUFFIXES "include/${libname2}"
)
if(IRRLICHT_INCLUDE_DIR)
break()
endif()
endforeach()
# Handholding for users
if(IRRLICHT_INCLUDE_DIR AND (NOT IS_DIRECTORY "${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()