refactor version

CMakeLists.txt

@@ -1,9 +1,11 @@
 cmake_minimum_required(VERSION 3.20)
 cmake_policy(SET CMP0048 NEW)
 
+set(DTL_VERSION 2.01)
+
 project(
   dtl
-  VERSION 1.21
+  VERSION ${DTL_VERSION}
 )
 
 include(CheckIncludeFile)
@@ -18,6 +20,12 @@ if(HAVE_UNISTD_H)
   add_definitions(-DHAVE_UNISTD_H)
 endif()
 
+configure_file(
+  ${CMAKE_CURRENT_SOURCE_DIR}/include/dtl/variables.hpp.in
+  ${CMAKE_CURRENT_SOURCE_DIR}/include/dtl/variables.hpp
+  @ONLY
+)
+
 include_directories(BEFORE ${CMAKE_CURRENT_SOURCE_DIR}/include)
 
 option(DTL_ENABLE_TESTING "Enable DTL unit tests" OFF)