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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Yes we did agree in principle that we didn’t need to support DWARF-2 at the US dev meeting.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>However we still allow -gdwarf-2 to be specified on the command line which gives the impression that DWARF-2 is supported.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>So should the -gdwarf-2 option be removed (which makes it really obvious that it is not supported) possibly requiring changes to existing build command lines that currently use it, or your alternative suggestion that should it generate DWARF-3 (or 4, or 5) but with a warning that DWARF-2 is not supported and generating DWARF-3 (or 4, or 5) instead.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>However this is maybe something that should be discussed separately from this patch.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Keith<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Renato Golin [mailto:renato.golin@linaro.org] <br><b>Sent:</b> 05 February 2014 11:24<br><b>To:</b> Keith Walker<br><b>Cc:</b> Eric Christopher; Adrian Prantl; LLVM Commits<br><b>Subject:</b> Re: [PATCH] Emit DWARF info for all code section in an assembly file<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal>On 5 February 2014 09:58, Keith Walker <<a href="mailto:kwalker@arm.com" target="_blank">kwalker@arm.com</a>> wrote:<o:p></o:p></p><div><p class=MsoNormal><span style='color:#222222'>3. Just don't support -gdwarf-2 at all ... does anyone know if there are</span><o:p></o:p></p></div><p class=MsoNormal>any toolchains which require DWARF-2 that need to be supported?<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I think we kind of agreed on that on the debug session at the US dev meeting.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I know of one case where it's still being used, the kernel:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="http://llvm.org/bugs/show_bug.cgi?id=18689">http://llvm.org/bugs/show_bug.cgi?id=18689</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>But I'm more inclined to just ask them to change it in the build system than actually actively support Dwarf 2 or ignore the flag and pretend they meant Dwarf 3 (or 4, or 5).<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>cheers,<o:p></o:p></p></div><div><p class=MsoNormal>--renato<o:p></o:p></p></div></div></div></div></body></html>