<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Mar 4, 2021, at 01:19, Petr Hosek via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><div dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div class=""></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 3, 2021 at 9:06 PM Mehdi AMINI via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class=""><div dir="ltr" class=""><div dir="ltr" class=""><br class=""></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 3, 2021 at 5:34 PM Michael Kruse <<a href="mailto:llvmdev@meinersbur.de" target="_blank" class="">llvmdev@meinersbur.de</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;">Am Mi., 3. März 2021 um 13:18 Uhr schrieb Mehdi AMINI via llvm-dev<br class=""><<a href="mailto:llvm-dev@lists.llvm.org" target="_blank" class="">llvm-dev@lists.llvm.org</a>>:<br class="">> That's a good point:<br class="">> - stage1: build just clang with host clang-8/libstdc++<br class="">> - stage1.5: build libc++ with stage1 clang<br class="">> - stage 2: assemble toolchain with clang from stage1 and libc++ from stage2<br class="">> - stage3: build test "anything" using stage2 (`ninja check-all` in the monorepo for example, but applicable to any other external project)<br class=""><br class="">Stage 1.5 is exactly what cmake<br class="">-DLLVM_ENABLE_RUNTIMES=libcxxabi;libcxx should do. </blockquote><div class=""><br class=""></div><div class="">Fantastic! It looks like the cmake option I was suggesting already exists actually :)</div><div class=""><br class=""></div><div class="">I had to read our CMake scripts to figure out how to use it though,</div></div></div></div></blockquote><div class=""><br class=""></div><div class="">Documentation is definitely something that needs improving since right now it's basically completely absent.</div><div class=""> </div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class=""><div dir="ltr" class=""><div class="gmail_quote"><div class="">looking at <a href="https://llvm.org/docs/BuildingADistribution.html#relevant-cmake-options" target="_blank" class="">https://llvm.org/docs/BuildingADistribution.html#relevant-cmake-options</a><span class="Apple-converted-space"> </span>it mentions the CMake option, but just running locally `ninja` does not get them to be built, I had to explicitly call `ninja runtimes` to get libc++ to be built, I don't know if this is intended?</div></div></div></div></blockquote><div class=""><br class=""></div><div class="">In all our examples, we always use `ninja distribution` and include `runtimes` in `LLVM_DISTRIBUTION_COMPONENTS` and I haven't thought of also including `runtimes` in the default target, but it makes sense and should be easy to fix.</div><div class=""> </div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class=""><div dir="ltr" class=""><div class="gmail_quote"><div class="">I also need to explicitly have `-DLLVM_ENABLE_PROJECTS=clang` by the way otherwise `ninja runtimes` will error out obscurely at some point, the cmake handling of this option isn't defensive about it at the moment.</div></div></div></div></blockquote><div class=""><br class=""></div><div class="">That's also something we could improve.</div><div class=""> </div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class=""><div dir="ltr" class=""><div class="gmail_quote"><div class="">Anyway, I need to update the bot config to see if this "just works", but locally it seems promising!</div></div></div></div></blockquote><div class=""><br class=""></div><div class="">The runtimes build is under active development and we're interested in hearing about issues so please let me know if you run into problems.<br class=""></div></div></div></div></blockquote><div><br class=""></div><div>I will be changing the default way of building libc++ to the runtimes build (in the documentation). I am also in the process of adding a CI job to build and test libc++ with a bootstrapped Clang. Once those configurations are the default ones, we should be able to fix issues more easily as the usage of the runtimes build will increase. I do agree that it’s a bit difficult to find documentation on it right now though :-).</div><div><br class=""></div><div>Louis</div><br class=""><blockquote type="cite" class=""><div class=""><div dir="ltr" style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><div class="gmail_quote"><div class=""> </div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr" class=""><div dir="ltr" class=""><div class="gmail_quote"><div class="">Thanks Michael!</div><div class=""><br class=""></div><div class="">-- </div><div class="">Mehdi</div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""><br class=""></div><div class=""> </div><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-style: solid; border-left-color: rgb(204, 204, 204); padding-left: 1ex;"><br class="">When I last looked at it, it did work and haven't noticed work on that<br class="">front. However, I just re-tried and it actually does work. Thanks to<br class="">anyone who fixed it ;-)<br class=""><br class="">Michael<br class=""></blockquote></div></div></div>_______________________________________________<br class="">LLVM Developers mailing list<br class=""><a href="mailto:llvm-dev@lists.llvm.org" target="_blank" class="">llvm-dev@lists.llvm.org</a><br class=""><a href="https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev" rel="noreferrer" target="_blank" class="">https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a><br class=""></blockquote></div></div><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">LLVM Developers mailing list</span><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="mailto:llvm-dev@lists.llvm.org" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">llvm-dev@lists.llvm.org</a><br style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev</a></div></blockquote></div><br class=""></body></html>