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| -rw-r--r-- | cmake/modules/LLVMParseArguments.cmake | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/cmake/modules/LLVMParseArguments.cmake b/cmake/modules/LLVMParseArguments.cmake new file mode 100644 index 0000000..ce19be1 --- /dev/null +++ b/cmake/modules/LLVMParseArguments.cmake @@ -0,0 +1,80 @@ +# Copied from http://www.itk.org/Wiki/CMakeMacroParseArguments under +# http://creativecommons.org/licenses/by/2.5/. +# +# The PARSE_ARGUMENTS macro will take the arguments of another macro and define +# several variables. The first argument to PARSE_ARGUMENTS is a prefix to put on +# all variables it creates. The second argument is a list of names, and the +# third argument is a list of options. Both of these lists should be quoted. The +# rest of PARSE_ARGUMENTS are arguments from another macro to be parsed. +# +# PARSE_ARGUMENTS(prefix arg_names options arg1 arg2...) +# +# For each item in options, PARSE_ARGUMENTS will create a variable with that +# name, prefixed with prefix_. So, for example, if prefix is MY_MACRO and +# options is OPTION1;OPTION2, then PARSE_ARGUMENTS will create the variables +# MY_MACRO_OPTION1 and MY_MACRO_OPTION2. These variables will be set to true if +# the option exists in the command line or false otherwise. +# +#For each item in arg_names, PARSE_ARGUMENTS will create a variable with that +#name, prefixed with prefix_. Each variable will be filled with the arguments +#that occur after the given arg_name is encountered up to the next arg_name or +#the end of the arguments. All options are removed from these +#lists. PARSE_ARGUMENTS also creates a prefix_DEFAULT_ARGS variable containing +#the list of all arguments up to the first arg_name encountered. +# +#Here is a simple, albeit impractical, example of using PARSE_ARGUMENTS that +#demonstrates its behavior. +# +# SET(arguments +# hello OPTION3 world +# LIST3 foo bar +# OPTION2 +# LIST1 fuz baz +# ) +# +# PARSE_ARGUMENTS(ARG "LIST1;LIST2;LIST3" "OPTION1;OPTION2;OPTION3" ${arguments}) +# +# PARSE_ARGUMENTS creates 7 variables and sets them as follows: +# ARG_DEFAULT_ARGS: hello;world +# ARG_LIST1: fuz;baz +# ARG_LIST2: +# ARG_LIST3: foo;bar +# ARG_OPTION1: FALSE +# ARG_OPTION2: TRUE +# ARG_OPTION3: TRUE +# +# If you don't have any options, use an empty string in its place. +# PARSE_ARGUMENTS(ARG "LIST1;LIST2;LIST3" "" ${arguments}) +# Likewise if you have no lists. +# PARSE_ARGUMENTS(ARG "" "OPTION1;OPTION2;OPTION3" ${arguments}) + +MACRO(PARSE_ARGUMENTS prefix arg_names option_names) + SET(DEFAULT_ARGS) + FOREACH(arg_name ${arg_names}) + SET(${prefix}_${arg_name}) + ENDFOREACH(arg_name) + FOREACH(option ${option_names}) + SET(${prefix}_${option} FALSE) + ENDFOREACH(option) + + SET(current_arg_name DEFAULT_ARGS) + SET(current_arg_list) + FOREACH(arg ${ARGN}) + SET(larg_names ${arg_names}) + LIST(FIND larg_names "${arg}" is_arg_name) + IF (is_arg_name GREATER -1) + SET(${prefix}_${current_arg_name} ${current_arg_list}) + SET(current_arg_name ${arg}) + SET(current_arg_list) + ELSE (is_arg_name GREATER -1) + SET(loption_names ${option_names}) + LIST(FIND loption_names "${arg}" is_option) + IF (is_option GREATER -1) + SET(${prefix}_${arg} TRUE) + ELSE (is_option GREATER -1) + SET(current_arg_list ${current_arg_list} ${arg}) + ENDIF (is_option GREATER -1) + ENDIF (is_arg_name GREATER -1) + ENDFOREACH(arg) + SET(${prefix}_${current_arg_name} ${current_arg_list}) +ENDMACRO(PARSE_ARGUMENTS) |