[CMake] How to exclude some files from building?

[kipade]

Oh, I got it. I think the first method was so cool.
Thank you very much.



At 2017-03-31 14:10:12, "Domen Vrankar" <domen.vrankar at gmail.com> wrote:

2017-03-31 4:41 GMT+02:00 kipade <kipade at 163.com>:

There are some files I do not want to build if the specified condition was ture.
For example, for testing, I want build a new file witch include a main entry just
for testing; if not, a new file would be compile for normal task.
I do not want to write two main entries in the same file just using macros to
control compiling. I want to use different clean and simple files.
So, how to do it?



You can either use generator expressions:

-------------------------

cmake_minimum_required(VERSION 3.5)

project(dependent CXX)

set(MY_DEPEND "ON" CACHE BOOL "toggle feature")

add_executable(
    ${PROJECT_NAME}
    main.cpp
    $<$<BOOL:${MY_DEPEND}>:first/a.cpp>
    $<$<NOT:$<BOOL:${MY_DEPEND}>>:second/a.cpp>
  )

target_include_directories(
    ${PROJECT_NAME} PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}"
  )

-------------------------


Or  add files to a variable:

-------------------------

cmake_minimum_required(VERSION 3.5)

project(dependent CXX)

set(MY_DEPEND "ON" CACHE BOOL "toggle feature")


if(MY_DEPEND)

  set(extra_src_ "first/a.cpp")

else()

  set(extra_src_ "second/a.cpp")

endif()


add_executable(
    ${PROJECT_NAME}
    main.cpp

    ${extra_src_}

  )

target_include_directories(
    ${PROJECT_NAME} PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}"
  )

-------------------------


Regards,

Domen
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