On 25 September 2015 at 22:11, David Malcolm <dmalc...@redhat.com> wrote: >> >> + if (0) >> + show_ruler (context, line_width, m_x_offset); >> >> This should probably be removed from the final code to be committed. > > FWIW, the ruler is very helpful to me when debugging the locus-printing > (e.g. when adding fix-it-hints), and if we remove that if (0) call, we > get: > > warning: ‘void show_ruler(diagnostic_context*, int, int)’ defined but > not used [-Wunused-function] > > which will break bootstrap, so perhaps it instead should be an option? > "-fdiagnostics-show-ruler" or somesuch? > > I don't know that it would be helpful to end-users though.
Functions that are useful only for debugging GCC usually start with debug_* and have special attribute annotation (grep ^debug_) which prevents those kinds of warnings (or the optimizers being too smart and removing them). Cheers, Manuel.
