CMake宏从流程中间返回？

Question

我可以从CMake macro的中间返回吗？我想到的一个用例如下。

macro (my_macro a b c)
    if (NOT USE_${a})
         # I WANT TO RETURN FROM HERE.
    endif ()
    if (NOT USE_${b})
         # I WANT TO RETURN FROM HERE.
    endif ()
    # Do something to c...
endmacro()

Answer 1

CMake中的宏基本上是替换，所以你实际上并没有从中返回。我建议你包装＆＃34; b＆＃34;和＆＃34; c＆＃34;代码到else()：

macro (my_macro a b c)
    if (NOT USE_${a})
         # I WANT TO RETURN FROM HERE.
    else ()
    if (NOT USE_${b})
         # I WANT TO RETURN FROM HERE.
    endif ()
    # Do something to c...
    endif(NOT USE_${a})
endmacro()