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cmake/modules/ParseArguments.cmake
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# Parse arguments passed to a function into several lists separated by
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# upper-case identifiers and options that do not have an associated list e.g.:
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#
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# SET(arguments
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#   hello OPTION3 world
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#   LIST3 foo bar
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#   OPTION2
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#   LIST1 fuz baz
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#   )
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# PARSE_ARGUMENTS(ARG "LIST1;LIST2;LIST3" "OPTION1;OPTION2;OPTION3" ${arguments})
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#
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# results in 7 distinct variables:
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#  * ARG_DEFAULT_ARGS: hello;world
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#  * ARG_LIST1: fuz;baz
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#  * ARG_LIST2:
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#  * ARG_LIST3: foo;bar
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#  * ARG_OPTION1: FALSE
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#  * ARG_OPTION2: TRUE
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#  * ARG_OPTION3: TRUE
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#
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# taken from http://www.cmake.org/Wiki/CMakeMacroParseArguments 
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MACRO(PARSE_ARGUMENTS prefix arg_names option_names)
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    SET(DEFAULT_ARGS)
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    FOREACH(arg_name ${arg_names})    
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        SET(${prefix}_${arg_name})
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    ENDFOREACH(arg_name)
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    FOREACH(option ${option_names})
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        SET(${prefix}_${option} FALSE)
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    ENDFOREACH(option)
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    SET(current_arg_name DEFAULT_ARGS)
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    SET(current_arg_list)
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    FOREACH(arg ${ARGN})            
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        SET(larg_names ${arg_names})    
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        LIST(FIND larg_names "${arg}" is_arg_name)                   
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        IF (is_arg_name GREATER -1)
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            SET(${prefix}_${current_arg_name} ${current_arg_list})
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            SET(current_arg_name ${arg})
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            SET(current_arg_list)
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        ELSE (is_arg_name GREATER -1)
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            SET(loption_names ${option_names})    
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            LIST(FIND loption_names "${arg}" is_option)            
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            IF (is_option GREATER -1)
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                SET(${prefix}_${arg} TRUE)
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            ELSE (is_option GREATER -1)
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                SET(current_arg_list ${current_arg_list} ${arg})
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            ENDIF (is_option GREATER -1)
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        ENDIF (is_arg_name GREATER -1)
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    ENDFOREACH(arg)
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    SET(${prefix}_${current_arg_name} ${current_arg_list})
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ENDMACRO(PARSE_ARGUMENTS)