On 13 Apr 2011, at 21:02, Nick Kledzik wrote: > I vaguely recall an issue (maybe a linker related) when the DWARF > debug_line table was empty (source file with no functions). The fix > was to pad out the line table with a couple of no-ops. Indeed, that was a linker bug rather than a gdb bug. See e.g. rdar:// problem/5611555 Jonas