[PATCH] D52193: RFC: [clang] Multithreaded compilation support -- NOT FOR SUBMIT

angushewlett added a comment. In D52193#1589657 , @aganea wrote: > > In D52193#1589150 , @angushewlett > wrote: > >> They're issued in the right order, but the second doesn't wait for the first >> to

[PATCH] D52193: RFC: [clang] Multithreaded compilation support -- NOT FOR SUBMIT

angushewlett added a comment. In D52193#1457612 , @aganea wrote: > That is strange. As you can’t mix /Yc and /Yu on the command line, MSBuild > should issue two different calls to clang-cl, one with /Yc and one /Yu /MP. > Can you check with ProcMon that

[PATCH] D52193: RFC: [clang] Multithreaded compilation support -- NOT FOR SUBMIT

angushewlett added a comment. Having applied this patch to the clang latest (which took a bit of doing, and it's possible I messed up along the way) - all working in general, and a roughly 6x speed-up on my i7-7820X. However, PCH support does not seem to work correctly. Specifically, it looks