cmake: detect reader/writer template changes

Author: scivision

src/CMakeLists.txt

@@ -11,6 +11,9 @@ configure_file(reader.in.f90 reader.f90 @ONLY)
 file(READ writer_template.in.f90 writer_template)
 configure_file(writer.in.f90 writer.f90 @ONLY)
 
+set_directory_properties(PROPERTIES CMAKE_CONFIGURE_DEPENDS
+"reader_template.in.f90;writer_template.in.f90")
+
 target_sources(nc4fortran PRIVATE
 interface.f90
 read.f90 ${CMAKE_CURRENT_BINARY_DIR}/reader.f90