(-- )?  SameProjectVarsSubdir_SOURCE_DIR = [^
]+/subdir1
  SameProjectVarsSubdir_BINARY_DIR = [^
]+/subdir1
  SameProjectVarsSubdir_IS_TOP_LEVEL = OFF
(-- )?  sub2proj_SOURCE_DIR = [^
]+/subdir2
  sub2proj_BINARY_DIR = [^
]+/subdir2