cmake one module include another one

Question

For a cmake toolchain file, A.toolchain.cmake, I want to include B.cmake, which only has some variables set. Two cmake file lay in the same folder. But cmake output error, cannot find B.cmake.

CMake Error at /Users/robert/workspace/cpp/CLIon/rSock/xbuild/cmake/Darwin_x86_64.toolchain.cmake:12 (include): include could not find load file: /Users/robert/workspace/cpp/CLIon/rSock/xbuild/build/Darwin_x86_64/CMakeFiles/CMakeTmp/xbuild/cmake/base.cmake

I tried many ways, relative or absolute path, or set as module. They just don't work. But if I put include in CMakelists.txt, it works. Why? Only cmakelists.txt can include other cmake files?

#include("./base.cmake")

#set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/xbuild/cmake")
#include(base)

include(${PROJECT_SOURCE_DIR}/xbuild/cmake/base.cmake)

Answer 1

Try using CMAKE_CURRENT_LIST_DIR:

include("${CMAKE_CURRENT_LIST_DIR}/base.cmake")