如何仅更改CMake中的一个可执行文件的编译器标志？ [英] How to change a compiler flag for just one executable in CMake?

问题描述

我有一个CMake项目，该项目通过 \MP 标志支持Visual Studio中的多处理器编译。

I have a CMake project that supports multiple processor compilation in Visual Studio through the \MP flag.

由于仅在项目构建的多个可执行文件之一中，我需要将 \MP 标志设置为false（或将其禁用（因为导入<$时出错） c $ c> .tlb 文件），如何为该目标设置不同的标志？

Since in just one of the many executable that the project builds, I need to set the \MP flag to false (or disable it because I get errors importing a .tlb file), how can I set the flags for this target different?

add_executable(MyProgram myprogram.cpp)
target_link_libraries(MyProgram MyLibraries)

我应该给一些 set_target_properties 是从整个项目中删除还是删除标志？
谢谢！

Should I give some set_target_properties to cmake or specifically remove the flag from the whole project? Thank you!

推荐答案

您可以使用 set_source_files_properties 添加 COMPILE_FLAGS 。例如：

You can use set_source_files_properties to add COMPILE_FLAGS for myprogram.cpp. For example:

add_executable(MyProgram myprogram.cpp)

# Add the -std=c++11 flag as an example
set_source_files_properties( myprogram.cpp PROPERTIES COMPILE_FLAGS "-std=c++11" )
target_link_libraries(MyProgram MyLibraries)

如果在MyProgram目标中所有源文件都需要这些标志，则可以使用 set_target_properties 和目标属性 COMPILE_FLAGS ：

If you need those flags for all source files in the MyProgram target, you could use set_target_properties with the target property COMPILE_FLAGS:

add_executable(MyProgram myprogram.cpp)
# Add the -std=c++11 flag as an example
target_link_libraries(MyProgram MyLibraries)
set_target_properties( MyProgram PROPERTIES COMPILE_FLAGS "-std=c++11" )

更新：要删除单个属性，您可以先获取所有属性，然后从列表中手动删除有问题的标志。例如，使用 get_source_file_property ：

Update: To remove a single property, you can first get all the properties and manually remove the offending flag from the list. For example with get_source_file_property:

get_source_file_property( MYPROPS myprogram.cpp COMPILE_FLAGS )
STRING( REPLACE "/MP1" "" MYPROPS ${MYPROPS} )
set_source_files_properties( myprogram.cpp COMPILE_FLAGS ${MYPROPS} )

但是，我建议拆分您的源文件成两半。一个带有所有带有\MP标志的源文件，另一个带有仅myprogram.cpp

However, I would recommend splitting your source files in two. One with all the source files with the \MP flag and another with only myprogram.cpp

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