[cfe-dev] [llvm-dev] Windows /bigobj

[Gábor Márton via cfe-dev]

Hi Aaron, thanks for your answer.

> We usually try to limit it in cases where it makes sense to do so.
e.g., for a while we would put in efforts to reduce the number of
template instantiations to help avoid this problem. However, I believe
we only do that up to a point.

The corresponding file is a unittest file "ASTImporterTest.cpp" with many
gtest macros, which I suspect do quite many template instantiations.
I don't think it would be easy to reduce the size in this case, but I am
open to any idea.
Is it okay to connect with the buildbot owner and ask for /bigobj for this
file? Who should approve such decisions?

Thanks,
Gabor


On Mon, Dec 17, 2018 at 4:18 PM Aaron Ballman <aaron at aaronballman.com>
wrote:

> On Mon, Dec 17, 2018 at 10:12 AM Gábor Márton via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
> >
> > Hi,
> >
> > Recently one Windows build bot failed by my commit, because the obj file
> being generated is too big:
> >
> >
> C:\ps4-buildslave2\llvm-clang-x86_64-expensive-checks-win\llvm\tools\clang\unittests\AST\ASTImporterTest.cpp
> : fatal error C1128: number of sections exceeded object file format limit:
> compile with /bigobj
> >
> > Is there an LLVM policy to limit the maximum size of the generated obj
> files?
>
> We usually try to limit it in cases where it makes sense to do so.
> e.g., for a while we would put in efforts to reduce the number of
> template instantiations to help avoid this problem. However, I believe
> we only do that up to a point.
>
> > If not then I suspect the only solution is to turn on /bigobj on the
> build bot, right?
>
> We already required that for some files; we turn on /bigobj support
> for several files in Clang. We usually only do this on a file-by-file
> basis though, so we can be alerted when new files are causing
> problems.
>
> ~Aaron
>
> > (Of course, I could refactor the cpp file to several smaller ones, but
> how do I know where to cut it?)
> >
> > Thanks,
> > Gabor
> > _______________________________________________
> > LLVM Developers mailing list
> > llvm-dev at lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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