CMakeLists.txt 和两个 .cmake 文件

Question

I have two *.cmake files, lets say nacl.cmake and pnacl.cmake in my ./CMake/ folder. How do I cmake using the specific one using my CMakeLists.txt?

Answer 1

Make an option to let user switch between them:

option(USE_PNACL "Use PNaCl instead fo NaCl" TRUE)

if(USE_PNACL)
  include(CMake/PNacl.cmake)
else()
  include(CMake/Nacl.cmake)
endif()

Answer 2

They sound like two alternative toolchains . You can chose between different toolchains during configuration with the CMAKE_TOOLCHAIN_FILE option:

cmake -DCMAKE_TOOLCHAIN_FILE=<project-folder>/CMake/PNacl.cmake <project-folder>

If you don't specify a toolchain file, the build system will target the build machine.