Unresolved transfer sion not resolved in DS-5 eclipse

Eclipse reports unresolved compression sion for system headers such as stdio. h if it cannot locate the header files for a project. you can resolve this by right-clicking on the project in the project explorer view and then selecting properties...
From the context menu. in the dialog box, select: C/C ++ General → paths and symbols → add... and then add the path to the arm compiler headers on your host workstation. for example, c: \ Program Files \ DS-5 \ include. select both add to all invocations and add
To all versions, click on apply so that eclipse can rebuild the index.