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# - MACRO_OPTIONAL_ADD_SUBDIRECTORY() combines add_subdirectory() with an option()
# MACRO_OPTIONAL_ADD_SUBDIRECTORY( <dir> )
# If you use MACRO_OPTIONAL_ADD_SUBDIRECTORY() instead of add_subdirectory(),
# this will have two effects
# 1 - CMake will not complain if the directory doesn't exist
# This makes sense if you want to distribute just one of the subdirs
# in a source package, e.g. just one of the subdirs in kdeextragear.
# 2 - If the directory exists, it will offer an option to skip the
# subdirectory.
# This is useful if you want to compile only a subset of all
# directories.
# Copyright (c) 2007, Alexander Neundorf, <neundorf@kde.org>
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
macro (MACRO_OPTIONAL_ADD_SUBDIRECTORY _dir )
get_filename_component(_fullPath ${_dir} ABSOLUTE)
if(EXISTS ${_fullPath})
if(${ARGC} EQUAL 2)
option(BUILD_${_dir} "Build directory ${_dir}" ${ARGV1})
else(${ARGC} EQUAL 2)
option(BUILD_${_dir} "Build directory ${_dir}" TRUE)
endif(${ARGC} EQUAL 2)
if(BUILD_${_dir})
add_subdirectory(${_dir})
endif(BUILD_${_dir})
endif(EXISTS ${_fullPath})
endmacro (MACRO_OPTIONAL_ADD_SUBDIRECTORY)
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