Added cmake buildfile

Author: xloem

CMakeLists.txt

@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 3.10)
+
+project(flat-tree)
+
+add_library(flat-tree INTERFACE)
+target_include_directories(flat-tree INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/..)
+install(FILES index.hxx DESTINATION include/flat-tree)
+
+include(CTest)
+if(BUILD_TESTING)
+	add_executable(flat-tree-test test/index.cxx)
+	target_link_libraries(flat-tree-test flat-tree)
+	add_test(NAME flat-tree COMMAND flat-tree-test)
+endif()