Following with interest. Ben
On Sat, 11 Jan 2020 at 19:26, Bill Ticehurst <bill.ticehu...@gmail.com> wrote: > Being that this wouldn't be a "high priority" issue, the chance of getting > it back-ported to older shipped branches is probably low. Sorry for those > of you stuck on older builds. (Good news is, with v8 shipping every 6 > weeks, you don't have to wait long until 'master' becomes 'legacy' :-) ). > > I actually managed to simplify the changes somewhat by just suppressing a > harmless MSVC warning that was being treated as an error. I've opened a CL > against the tip of master at > https://chromium-review.googlesource.com/c/v8/v8/+/1996157 . With this > change you should be able to build a release DLL of V8 with MSVC. > > There was one linker error in the tests unfortunately I couldn't fix (yet) > without breaking other platforms, so I had to comment that test out for > MSVC DLL builds. I'll take another crack at it later. Debug builds of DLLs > also have further issues on MSVC I haven't tackled yet. > > - Bill > > > On Saturday, December 21, 2019 at 3:19:42 PM UTC-8, Bill Ticehurst wrote: >> >> I spent a little more time on this and pushed another commit to my fork >> of the 8.0 branch (see comparison with upstream 8.0 at >> https://github.com/v8/v8/compare/8.0-lkgr...billti:v8.0-msvc-fixes?expand=1 >> ). >> >> The tests now compile and pass with MSVC too now. For those following >> along, this was how I ran the build/test. >> >> From the root folder, run the below to generate a x64 release build using >> MSVC and building DLLs (assuming you're on Windows, obviously) >> >> * python tools\dev\v8gen.py -b x64.release msvc -- is_clang=false >> is_component_build=true* >> >> Run the build, which should complete without error: >> >> * ninja -C out.gn/msvc <http://out.gn/msvc>* >> >> If you want to run the tests for good measure: >> >> * python tools/run-tests.py --outdir out.gn/msvc <http://out.gn/msvc>* >> >> You should find the resulting v8.dll, along with supporting dlls and .lib >> files, in the .\out.gn\msvc directory. >> >> I haven't tested much beyond running the tests and doing a few ad-hoc D8 >> experiments, and obviously this is unsupported/untested upstream (where the >> are no bots building/testing/fuzzing this configuration). >> >> I'll tidy this up, open a CL, and see if this is something we can get >> upstreamed, as several folks seem to want this option. Assuming V8/Google >> doesn't want to run bots for this configuration but is happy to take fixes, >> is would then be beholden on us (the V8 community) to keep it working. >> (Personally, it seems to me like the only long-term sustainable solution >> for cross-compiler support is a C-based API, similar to N-API for Node.js, >> but I doubt there's much appetite for this currently). >> >> - Bill >> >> >> On Friday, December 20, 2019 at 10:29:07 AM UTC-8, Ivan Pizhenko wrote: >>> >>> Oh, that’s great. Thank you. I will try to apply similar patch locally >>> to the 7.8.279.23, since I am allowed to use only “stable” versions of V8. >>> >>> - Ivan >>> >>> >>> >>> >>> >>> *From: *'Bill Ticehurst' via v8-users >>> *Sent: *Friday, December 20, 2019 20:02 >>> *To: *v8-users >>> *Subject: *[v8-users] Re: Building v8 shared library on windows >>> >>> >>> >>> FWIW: I played around with the last night for a couple hours and got a >>> release build working using a "component build" and MSVC. It was mostly >>> moving some inline functions and adding some V8_EXPORT_PRIVATE statements >>> (which effectively add the "__declspec(dllexport)" statements to expose >>> functions across DLLs with MSVC). You can see the changes over the current >>> V8 v8.0 branch at >>> https://github.com/v8/v8/compare/8.0-lkgr...billti:v8.0-msvc-fixes?expand=1 >>> >>> >>> >>> This is very rough code, hacking away at one build break at a time until >>> it worked. I'll need to clean it up with a consistent approach before it >>> would be ready for a CL. It also only works for the product binaries & D8 >>> so far (i.e. build with "ninja -C out.gn\x64.release d8"), so I need to >>> fix up the failures when building the test code (which means figuring out >>> some of the subtlety in >>> https://github.com/v8/v8/blob/master/src/base/export-template.h ). >>> >>> >>> >>> Bottom line: It seems fixable without major changes, and should be very >>> low risk (as the V8_EXPORT_* macros effectively compile to nothing in >>> static builds - which is what Chromium and Node.js use for release). >>> >>> >>> >>> - Bill >>> >>> On Wednesday, December 18, 2019 at 10:06:42 AM UTC-8, Bill Ticehurst >>> wrote: >>> >>> I'm not clear on what is needed to fix this. The bug has been open quite >>> a while (see https://bugs.chromium.org/p/v8/issues/detail?id=8791). >>> >>> On Tuesday, December 17, 2019 at 12:44:14 PM UTC-8, Ivan Pizhenko wrote: >>> >>> Hi Bill, so what needs to be fixed to get DLL build (i.e. >>> is_component_build=true) built successfully with MSVC compiler? >>> >>> I've recently run into the same linking issue with DLL build compiled >>> using clang. And to say truth, it's weird that DLL build works only with >>> clang. >>> >>> p.s. I cannot use prebuilt binaries from nuget and cannot use clang to >>> build my app. Need to use strictly MSVC 2017. >>> >>> - Ivan >>> >>> >>> On Tuesday, December 17, 2019 at 6:36:12 PM UTC+2, Bill Ticehurst wrote: >>> >>> To be clear, NuGet is a Microsoft run package manager, but "Microsoft" >>> doesn't offer any pre-built V8 binaries. A user account named "pmed" >>> created/uploaded that package, not a Microsoft account. >>> >>> >>> >>> If you are building V8 in a default manner with Clang as it appears, >>> then you can't link it with a project you're building with the MSVC >>> compiler. Those are two different compilers and C++ doesn't have a cross >>> compiler stable ABI (especially if using "custom_libcxx", which means they >>> are also using a different standard C++ library - V8 the Clang provided >>> "libc++", and MSVC will use it's own). >>> >>> >>> >>> If you build V8 with Clang, you'll should build your project with Clang >>> too (ideally using the same build toolchain - i.e. by updating the BUILD.gn >>> file to include a target for your project - the doc at >>> https://v8.dev/docs/embed details the Process and Shell sample apps >>> which build via BUILD.gn and you can follow as an example). If you do >>> decide to build V8 with MSVC, then as mentioned previously, "component >>> build" isn't working currently, and you'll need to static link everything >>> together ("is_component_build = false"), resulting in a large binary, >>> rather than several V8 DLLs and a small application exe). >>> >>> >>> >>> - Bill >>> >>> >>> On Tuesday, December 17, 2019 at 4:31:52 AM UTC-8, Stefan Wörthmüller >>> wrote: >>> >>> Note that Microsoft also offers prebuild verrions of v8 via the package >>> manager or direct to download. >>> >>> I.e. https://www.nuget.org/packages/v8-v140-x64/ click on "Download" at >>> the right and rename the archive to zip. Works well for me. >>> >>> >>> >>> -- >>> -- >>> v8-users mailing list >>> v8-u...@googlegroups.com >>> http://groups.google.com/group/v8-users >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "v8-users" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to v8-u...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/v8-users/a0a7c08b-7ff7-40cf-9104-021a97912018%40googlegroups.com >>> <https://groups.google.com/d/msgid/v8-users/a0a7c08b-7ff7-40cf-9104-021a97912018%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> >>> >> -- > -- > v8-users mailing list > v8-users@googlegroups.com > http://groups.google.com/group/v8-users > --- > You received this message because you are subscribed to the Google Groups > "v8-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to v8-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/v8-users/e738b2fd-3d7e-4684-8f45-9642b8e2c221%40googlegroups.com > <https://groups.google.com/d/msgid/v8-users/e738b2fd-3d7e-4684-8f45-9642b8e2c221%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. 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