[docs] Add LICENSE.txt to the root of the mono-repo
[llvm-project.git] / cmake / Modules / ExtendPath.cmake
blob0dd6a4d3dab5e07075590ac637670e86096452f0
1 # Extend the path in `base_path` with the path in `current_segment`, returning
2 # the result in `joined_path`. If `current_segment` is an absolute path then
3 # just return it, in effect overriding `base_path`, and issue a warning.
5 # Note that the code returns a relative path (avoiding introducing leading
6 # slashes) if `base_path` is empty.
7 function(extend_path joined_path base_path current_segment)
8   if("${current_segment}" STREQUAL "")
9     set(temp_path "${base_path}")
10   elseif("${base_path}" STREQUAL "")
11     set(temp_path "${current_segment}")
12   elseif(IS_ABSOLUTE "${current_segment}")
13     message(WARNING "Since \"${current_segment}\" is absolute, it overrides base path: \"${base_path}\".")
14     set(temp_path "${current_segment}")
15   else()
16     set(temp_path "${base_path}/${current_segment}")
17   endif()
18   set(${joined_path} "${temp_path}" PARENT_SCOPE)
19 endfunction()