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# FIND_PACKAGE_MESSAGE(<name> "message for user" "find result details")
#
# This macro is intended to be used in FindXXX.cmake modules files.
# It will print a message once for each unique find result.
# This is useful for telling the user where a package was found.
# The first argument specifies the name (XXX) of the package.
# The second argument specifies the message to display.
# The third argument lists details about the find result so that
# if they change the message will be displayed again.
# The macro also obeys the QUIET argument to the find_package command.
#
# Example:
#
# IF(X11_FOUND)
# FIND_PACKAGE_MESSAGE(X11 "Found X11: ${X11_X11_LIB}"
# "[${X11_X11_LIB}][${X11_INCLUDE_DIR}]")
# ELSE(X11_FOUND)
# ...
# ENDIF(X11_FOUND)
FUNCTION(FIND_PACKAGE_MESSAGE pkg msg details)
# Avoid printing a message repeatedly for the same find result.
IF(NOT ${pkg}_FIND_QUIETLY)
SET(DETAILS_VAR FIND_PACKAGE_MESSAGE_DETAILS_${pkg})
IF(NOT "${details}" STREQUAL "${${DETAILS_VAR}}")
# The message has not yet been printed.
MESSAGE(STATUS "${msg}")
# Save the find details in the cache to avoid printing the same
# message again.
SET("${DETAILS_VAR}" "${details}"
CACHE INTERNAL "Details about finding ${pkg}")
ENDIF(NOT "${details}" STREQUAL "${${DETAILS_VAR}}")
ENDIF(NOT ${pkg}_FIND_QUIETLY)
ENDFUNCTION(FIND_PACKAGE_MESSAGE)
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