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# Mimick `GNUInstallDirs` for one more install directory, the one where
# project's installed cmake subdirs go.
# These functions are internal functions vendored in from GNUInstallDirs (with
# new names), so we don't depend on unstable implementation details. They are
# also simplified to only handle the cases we need.
#
# The purpose would appear to be making `CACHE PATH` vars in a way that
# bypasses the legacy oddity that `-D<PATH>` gets canonicalized, despite
# non-canonical `CACHE PATH`s being perfectly valid.
macro(_GNUInstallPackageDir_cache_convert_to_path var description)
get_property(_GNUInstallPackageDir_cache_type CACHE ${var} PROPERTY TYPE)
if(_GNUInstallPackageDir_cache_type STREQUAL "UNINITIALIZED")
file(TO_CMAKE_PATH "${${var}}" _GNUInstallPackageDir_cmakepath)
set_property(CACHE ${var} PROPERTY TYPE PATH)
set_property(CACHE ${var} PROPERTY VALUE "${_GNUInstallPackageDir_cmakepath}")
set_property(CACHE ${var} PROPERTY HELPSTRING "${description}")
unset(_GNUInstallPackageDir_cmakepath)
endif()
unset(_GNUInstallPackageDir_cache_type)
endmacro()
# Create a cache variable with default for a path.
macro(_GNUInstallPackageDir_cache_path var default description)
if(NOT DEFINED ${var})
set(${var} "${default}" CACHE PATH "${description}")
endif()
_GNUInstallPackageDir_cache_convert_to_path("${var}" "${description}")
endmacro()
_GNUInstallPackageDir_cache_path(CMAKE_INSTALL_PACKAGEDIR "${CMAKE_INSTALL_LIBDIR}/cmake"
"Directories containing installed CMake modules (lib/cmake)")
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