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# - A smarter replacement for list(REMOVE_DUPLICATES) for library lists
#
# Note that, in the case of cyclic link dependencies, you _do_ actually need
# a library in a list multiple times. So, only use this function when you know
# that the dependency graph is acyclic.
#
# clean_library_list(<listvar> [<additional list items>...]) - where
# listvar is the name of a destination variable, and also possibly a source, and
# it is followed by any number (including 0) of additional libraries to append
# to the list before processing.
#
# Removes duplicates from the list, leaving only the last instance, while
# preserving the meaning of the "optimized", "debug", and "general" labeling.
# (Libraries listed as general are listed in the result instead as optimized and
# debug)
#
# Requires CMake 2.6 or newer (uses the 'function' command)
#
# Original Author:
# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
# http://academic.cleardefinition.com
# Iowa State University HCI Graduate Program/VRAC
#
# Copyright Iowa State University 2009-2010.
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)
if(__clean_library_list)
return()
endif()
set(__clean_library_list YES)
function(clean_library_list _var)
# combine variable's current value with additional list items
set(_work ${${_var}} ${ARGN})
if(_work)
# Turn each of optimized, debug, and general into flags
# prefixed on their respective library (combining list items)
string(REGEX REPLACE "optimized;" "1CLL%O%" _work "${_work}")
string(REGEX REPLACE "debug;" "1CLL%D%" _work "${_work}")
string(REGEX REPLACE "general;" "1CLL%G%" _work "${_work}")
# Any library that doesn't have a prefix is general, and a general
# library is both debug and optimized so stdize it
set(_std)
foreach(_lib ${_work})
if(NOT "${_lib}" MATCHES "^1CLL%.%")
list(APPEND _std "1CLL%D%${_lib}" "1CLL%O%${_lib}")
elseif("${_lib}" MATCHES "^1CLL%G%")
string(REPLACE "1CLL%G%" "" _justlib "${_lib}")
list(APPEND _std "1CLL%D%${_justlib}" "1CLL%O%${_justlib}")
else()
list(APPEND _std "${_lib}")
endif()
endforeach()
# REMOVE_DUPLICATES leaves the first - so we reverse before and after
# to keep the last, instead
list(REVERSE _std)
list(REMOVE_DUPLICATES _std)
list(REVERSE _std)
# Split list items back out again: turn prefixes into the
# library type flags.
string(REGEX REPLACE "1CLL%D%" "debug;" _std "${_std}")
string(REGEX REPLACE "1CLL%O%" "optimized;" _std "${_std}")
# Return _std
set(${_var} ${_std} PARENT_SCOPE)
endif()
endfunction()
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