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This is a matter of getting a Rust with support for `thiscall`: https://github.com/rust-lang/rust/pull/42058 (not merged or even reviewed at the time of this writing) and then propagating that knowledge into syntex and from there into bindgen.
Because of the time to ship thiscall support in Rust and syntex, we aren't going to block Stylo built-but-disabled waiting for win32 support.
Emilio landed a workaround in rust-bindgen so it doesn't panic when parsing the unrecognized thiscall calling convention. When servo upgrades to a new rust-bindgen release, we should then be able to build Stylo for Win32. https://github.com/servo/rust-bindgen/pull/722
Did this bug get sorted out as part of bug 1365254?
(In reply to Gregory Szorc [:gps] from comment #3) > Did this bug get sorted out as part of bug 1365254? You can use this bug for actually enabling Stylo builds for win32 and win64. That bug just fixed a win32 build problem.
Assignee: nobody → gps
Summary: enable Stylo for 32-bit Windows → Build Stylo for win32 and win64
Comment on attachment 8880148 [details] Bug 1366048 - Build stylo on win32 and win64 in automation; https://reviewboard.mozilla.org/r/151522/#review156486 \o/
Attachment #8880148 - Flags: review?(nfroyd) → review+
I'm going to hold off landing this until we know the backout service works.
We're still having some issues with VCS backout syncing. Rather than land this and increase the odds of things breaking, I'm going to wait until things are in a better state, likely by the middle of next week at the latest. Plus some regressions from Linux64 are still being worked out. Plus it is a Friday and I don't like fire fighting on the weekend.
Pushed by firstname.lastname@example.org: https://hg.mozilla.org/integration/autoland/rev/06ec956f7533 Build stylo on win32 and win64 in automation; r=froydnj
Status: ASSIGNED → RESOLVED
Last Resolved: a year ago
status-firefox56: --- → fixed
Resolution: --- → FIXED
Target Milestone: --- → mozilla56
This caused a 1.9 MB jump in installer size on Win 64 PGO.
(In reply to Kevin Brosnan [:kbrosnan] from comment #11) > This caused a 1.9 MB jump in installer size on Win 64 PGO. That was expected (we're building/shipping new code) and is similar to what was seen on Linux (see bug 1374824 comment 22). I can't answer whether that is a reasonable amount of size increase. (It probably is.)
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