如何在 CMake 中仅为一个可执行文件更改编译器标志? [英] How to change a compiler flag for just one executable in CMake?

问题描述

我有一个 CMake 项目，它通过 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.

由于只是在项目构建的众多可执行文件之一中，我需要将 MP 标志设置为 false(或禁用它，因为我在导入 .tlb代码>文件)，我如何为这个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 给 cmake 还是专门从整个项目中删除标志?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 用于 myprogram.cpp.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)

如果您需要为 MyProgram 目标中的所有源文件设置这些标志，您可以使用 set_target_properties 带有目标属性 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违规标志.例如 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，我建议将您的源文件一分为二.一个包含所有带有 MP 标志的源文件，另一个只有 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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