C++ '；覆盖'；使用宏生成命令并恢复其默认行为
我有以下（简化的）目录结构：C++ '；覆盖'；使用宏生成命令并恢复其默认行为,c++,build,cmake,C++,Build,Cmake,我有以下（简化的）目录结构： |-- doc/ |-- subdir1/ |-- subdir2/
|-- doc/
|-- subdir1/
|-- subdir2/
|-- CMakeLists.txt
|-- src
|-- subdir3/
|-- subdir4/
|-- CMakeLists.txt
|-- test
|-- subdir5/
|-- subdir6/
|-- CMakeLists.txt
|-- CMakeLists.txt
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
CMakeLists.txtadd_subdirectory(doc)
add_subdirectory(src)
add_subdirectory(test)
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
src/CMakeLists.txt中，我想使用自己版本的CMake命令
，因此我使用CMake“覆盖”命令，如下所示：
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
顶级CMakeLists.txt
包含如下内容：
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
对于目录“doc”和“src”，行为与预期一致。但是在“test”目录中，
覆盖的add_subdirectory（）
仍然适用，这不是我所期望的。我在
根据作用域规则，将使用add\u subdirectory（）
的默认行为
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
试图通过添加来恢复默认行为
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
在“src/CMakeLists.txt”的末尾，运行CMake时会导致分段错误，我
假设是无限递归调用的结果。这里也提出了类似的建议：
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
使用CMake而不是宏（）
似乎会导致相同的行为
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
因此，我的问题是：在CMake命令执行后，是否可以恢复其默认行为
被覆盖了吗
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
我使用的是CMake版本3.5.2。一个简单的解决方案是将您的maceo命名为其他名称，如我的添加子目录
，并在需要特殊行为的地方使用它
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
这样，您就不必费心“恢复”被覆盖的add_命令（如果可能的话），一切都应该正常。您可以通过在宏范围外定义的附加变量激活它：
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
set(MY_ADD_SUBDIRECTORY TRUE)
macro(add_subdirectory)
if (MY_ADD_SUBDIRECTORY)
message(STATUS "My own 'add_subdirectory()'")
endif()
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
参考
##src/CMakeLists.txt
macro(add_subdirectory)
message(STATUS "My own 'add_subdirectory()'")
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
# Call specialized version of 'add_subdirectory()'
add_subdirectory(subdir3)
add_subdirectory(subdir4)
add_subdirectory(doc) #Uses CMake standard command 'add_subdirectory()'
add_subdirectory(src) #Uses overwritten 'add_subdirectory()'
add_subdirectory(test) #Should use CMake standard command 'add_subdirectory()'
macro(add_subdirectory)
_add_subdirectory(${ARGV})
endmacro(add_subdirectory)
有时候我只是看不见树木，看不见森林。工作就像一个符咒：）