<div dir="ltr">That's a good idea too, I had forgotten about llvm-objcopy.</div><br><div class="gmail_quote"><div dir="ltr">On Fri, Jan 19, 2018 at 1:02 PM Peter Collingbourne <<a href="mailto:peter@pcc.me.uk">peter@pcc.me.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Fri, Jan 19, 2018 at 12:44 PM, Zachary Turner via llvm-dev <span dir="ltr"><<a href="mailto:llvm-dev@lists.llvm.org" target="_blank">llvm-dev@lists.llvm.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><br><br><div class="gmail_quote"><span><div dir="ltr">On Fri, Jan 19, 2018 at 12:29 PM Leonardo Santagada <<a href="mailto:santagada@gmail.com" target="_blank">santagada@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi,</div><div><br></div><div>No I didn't, I used cl.exe from the visual studio toolchain. What I'm proposing is a tool for processing .obj files in COFF format, reading them and generating the GHASH part.</div><div><br></div><div>To make our build faster we use hundreds of unity build files (.cpp's with a lot of other .cpp's in them aka munch files) but still have a lot of single .cpp's as well (in total something like 3.4k .obj files).</div><div><br></div><div>ps: sorry for sending to the wrong list, I was reading about llvm mailing lists and jumped when I saw what I thought was a lld exclusive list.<br></div></div></blockquote><div><br></div></span><div>A tool like this would be useful, yes. We've talked about it internally as well and agreed it would be useful, we just haven't prioritized it. If you're interested in submitting a patch along those lines though, I think it would be a good addition.</div><div><br></div><div>I'm not sure what the best place for it would be. llvm-readobj and llvm-objdump seem like obvious choices, but they are intended to be read-only, so perhaps they wouldn't be a good fit.</div><div><br></div><div>llvm-pdbutil is kind of a hodgepodge of everything else related to PDBs and symbols, so I wouldn't be opposed to making a new subcommand there called "ghash" or something that could process an object file and output a new object file with a .debug$H section.</div><div><br></div><div>A third option would be to make a new tool for it.</div></div></div></blockquote><div><br></div></div></div></div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>Another option would be to make it a feature of llvm-objcopy. That would probably require adding COFF support to that tool though.</div><div><br></div><div>Peter</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"></blockquote></div></div></div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_quote"><div><br></div><div>I don't htink it would be that hard to write. If you're interested in trying to make a patch for this, I can offer some guidance on where to look in the code. Otherwise it's something that we'll probably get to, I'm just not sure when.</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_extra">
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<br></blockquote></div></div></div><div dir="ltr"><div class="gmail_extra"><br><br clear="all"><div><br></div>-- <br><div class="m_-3819609187840473771m_5716821173578399660m_-1033023769895408992gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">-- <div>Peter</div></div></div>
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