[PATCH] D82994: [RFC] Instrumenting Clang/LLVM with Perfetto

Thu Jul 16 13:43:19 PDT 2020

lebedev.ri added inline comments.

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Comment at: llvm/cmake/modules/AddPerfetto.cmake:9
+  ExternalProject_Add(perfetto_git
+      GIT_REPOSITORY https://github.com/google/perfetto.git
+      GIT_TAG releases/v4.x
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nickdesaulniers wrote:
> lebedev.ri wrote:
> > I have concerns about this.
> > It really should use system-provided version via `find_package()`
> > At worst, the sources should be bundled into the tree like it's already done in some rare cases.
> Not that I'm very good with CMake, but this seems to suggest that `ExternalProject_Add` may not compose well with `find_package`: https://stackoverflow.com/questions/6351609/cmake-linking-to-library-downloaded-from-externalproject-add
What i am saying is that any code that fetches anything from internet during cmake/build time is just plain broken.
perfetto should be provided by system package and we should link to it just like we link to zlib/etc.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D82994/new/

https://reviews.llvm.org/D82994