what is the equivalent of `add_compile_options` in cmake

[maidamai0]

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I want to set some compile flags when building a package and it can be done with add_compile_options in CMake. How should I do in conanfile.py. I've searched for a while but didn't get an answer. CONAN_CXX_FLAGS didn't work

[maidamai0]

The flag I want to add is /Zc:__cplusplus on MSVC

[maidamai0]

CUrrently I use self._cmake.definitions["CMAKE_CXX_FLAGS"] = "/EHsc /Zc:__cplusplus" but I don't know if this is a good idea.

[czoido]

Hi @maidamai0, Can you provide more information about your use case? Are you using cmake-conan to create a package or just for consuming other packages. If you are using cmake-conan as a consumer you should add those in the CMakeLists.txt directly using add_compile_options. In the case you re you creating a package and you want to use those flags when building, yes, you could add those flags to definitions using the self._cmake.definitions.

[maidamai0]

Thank you @czoido I'm creating a package with conan. I'm concering if self._cmake.definitions["CMAKE_CXX_FLAGS"] = "/EHsc /Zc:__cplusplus" overrides the flags set before