Question

例如，我想使用以下语法编写my_add_lib函数：

my_add_lib(NAME <name>
           SRCS [src1 [src2 ...]]
           DEPS [dependency1 [dependancy2 ...]]])

如何实现这些“参数组”？

Answer 1

CMake提供CMakeParseArguments模块，可以为您解析参数。例如：

include(CMakeParseArguments)

function(my_add_lib)
    cmake_parse_arguments(
        PARSED_ARGS # prefix of output variables
        "" # list of names of the boolean arguments (only defined ones will be true)
        "NAME" # list of names of mono-valued arguments
        "SRCS;DEPS" # list of names of multi-valued arguments (output variables are lists)
        ${ARGN} # arguments of the function to parse, here we take the all original ones
    )
    # note: if it remains unparsed arguments, here, they can be found in variable PARSED_ARGS_UNPARSED_ARGUMENTS
    if(NOT PARSED_ARGS_NAME)
        message(FATAL_ERROR "You must provide a name")
    endif(NOT PARSED_ARGS_NAME)
    message("Provided sources are:")
    foreach(src ${PARSED_ARGS_SRCS})
        message("- ${src}")
    endforeach(src)
endfunction(my_add_lib)

从CMake 3.5开始，cmake_parse_arguments成为内置命令（用C ++而不是CMake编写）：不再需要include(CMakeParseArguments)但是，目前，文件CMakeParseArguments.cmake保持为空以保持兼容性

如何编写具有多个参数组的cmake函数？

1 个答案: