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# CMake macros to parse options
macro(parse_options _list_names _list_variables)
list(LENGTH ${_list_names} _list_names_length)
list(LENGTH ${_list_variables} _list_variables_length)
#message(STATUS "${_list_names} => ${_list_names_length}")
#message(STATUS "${_list_variables} => ${_list_variables_length}")
if(NOT _list_names_length EQUAL _list_variables_length)
message(SEND_ERROR "names list must have same length as var list")
endif(NOT _list_names_length EQUAL _list_variables_length)
set(_list_length ${_list_names_length})
# Set each list to be empty initially
foreach(_idx RANGE -${_list_length} -1)
list(GET ${_list_variables} ${_idx} _variable)
set(${_variable} "")
endforeach(_idx RANGE ${_list_length})
set(_current_list "")
foreach(_arg ${ARGN})
set(_skip_arg 0)
foreach(_idx RANGE -${_list_length} -1)
list(GET ${_list_names} ${_idx} _name)
if(_arg STREQUAL _name)
set(_current_list "${_arg}")
set(_skip_arg 1)
endif(_arg STREQUAL _name)
endforeach(_idx RANGE -${_list_length} -1)
if(NOT _current_list)
message(SEND_ERROR "Error parsing args (unknown argument '${_arg}').")
set(_skip_arg 1)
endif(NOT _current_list)
if(NOT _skip_arg)
#message(STATUS "list: '${_current_list}', arg: '${_arg}'")
foreach(_idx RANGE -${_list_length} -1)
list(GET ${_list_names} ${_idx} _name)
if(_current_list STREQUAL _name)
list(GET ${_list_variables} ${_idx} _variable)
list(APPEND ${_variable} "${_arg}")
endif(_current_list STREQUAL _name)
endforeach(_idx RANGE -${_list_length} -1)
endif(NOT _skip_arg)
endforeach(_arg ${ARGN})
endmacro(parse_options)
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