How do I do "Edit and Continue" builds with cmake projects in Visual Studio 2019?

Question

I want to do "Edit and Continue" in my Visual studio cmake C++ projects. I know I have to change /Zi to /ZI, but where?

This is C++

Answer 1

The easiest way is to insert the following commands before the definition of your first target:

if (CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
  set(CMAKE_CXX_FLAGS_DEBUG "/ZI")
  set(CMAKE_SHARED_LINKER_FLAGS "/SAFESEH:NO")
  set(CMAKE_EXE_LINKER_FLAGS "/SAFESEH:NO")
endif()

If you prefer to set the options for a specific target, use

if (CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
  target_compile_options(${PROJECT_NAME} PRIVATE "/ZI")
  target_link_options(${PROJECT_NAME} PRIVATE "/SAFESEH:NO")
endif()

Warning: as of the latest version of Visual Studio at the time of writing (16.4.2), Visual Studio cannot deal with changes to lambda functions.

Answer 2

The options must be set as follows:

CMAKE_C_FLAGS_DEBUG: /MDd /ZI /Ob0 /Od /RTC1
CMAKE_CXX_FLAGS_DEBUG: /MDd /ZI /Ob0 /Od /RTC1
CMAKE_EXE_LINKER_FLAGS_DEBUG: /debug /INCREMENTAL /LTCG:OFF
CMAKE_MODULE_LINKER_FLAGS_DEBUG: /debug /INCREMENTAL /LTCG:OFF
CMAKE_SHARED_LINKER_FLAGS_DEBUG: /debug /INCREMENTAL /LTCG:OFF