set(
   SRC_FILES ${SRC_FILES}
   ${CMAKE_CURRENT_SOURCE_DIR}/char.c
   ${CMAKE_CURRENT_SOURCE_DIR}/index.c
   ${CMAKE_CURRENT_SOURCE_DIR}/sequence.c
   ${CMAKE_CURRENT_SOURCE_DIR}/sequence_creation.c
   ${CMAKE_CURRENT_SOURCE_DIR}/sequence_from_string.c
)

set(SRC_FILES ${SRC_FILES} PARENT_SCOPE)