On Mon, Aug 26, 2013 at 10:23:24AM +0200, Jakub Jelinek wrote: > On Mon, Aug 26, 2013 at 01:42:18PM +0530, Senthil Kumar Selvaraj wrote: > > The help text for the --with-dwarf2 configure option says it forces > > the default debug format to be DWARF 2. However, the built compiler > > still produces DWARF 4, unless -gdwarf-2 is explicitly specified when > > compiling. > > This configure option is really --with-dwarf[234], it was added when > there was dwarf (1) support and dwarf2 support. In several places > (including the filename of dwarf2out.c) GCC still talks about dwarf2 when it > means DWARF2 or later.
Ah ok. > > > I see that the darwin target gets around this by using the > > SUBSUBTARGET_OVERRIDE_OPTIONS hook and setting dwarf_version to 2 if no > > specific dwarf version was requested. > > It isn't any kind of workaround the above. Apple tools are simply so buggy > that they can't grok DWARF later than 2, crash in lots of ways on it. > Why do you want DWARF2 rather than DWARF3 or 4? Same reason, some tools (proprietary debugger etc..) only work with DWARF2. So I guess the OVERRIDE_OPTIONS hook is the way to go. Regards Senthil
