Do not warn about an ununsed function, if it is marked with __attribute__((used)).
[cparser] / parsetest / cp_error037.c
2008-08-05 Moritz KrollFixed visibility of inline functions
2008-08-01 Matthias Braunsimplify testcase
2008-07-31 Moritz Krolltestcase: __inline__ declaration without implementation...