[llvm-dev] debugging installation problem

[David Callahan via llvm-dev]

Given they in separate repos, is there a way to to verify which revisions go together? Is it enough that the clang (shortly) after llvm in time?

On 2/5/19, 1:03 PM, "Eric Christopher" <echristo at gmail.com> wrote:

    Your clang and your llvm don't match, they're often version locked and
    you need to make sure both of them are the same-ish revision.
    
    -eric
    
    On Tue, Feb 5, 2019 at 12:22 PM David Callahan via llvm-dev
    <llvm-dev at lists.llvm.org> wrote:
    >
    > Sorry in advance for the limited details.
    >
    >
    >
    > I have a build of a recent (Monday) llvm/clang which I have installed in the expected way in my environment but I am getting failures like this;
    >
    >
    >
    > In file included from <some directory>/lib/clang/stable/include/x86intrin.h:29:
    >
    > In file included from <some directory>/lib/clang/stable/include/immintrin.h:118:
    >
    > <some directory>/lib/clang/stable/include/avx512cdintrin.h:37:20: error: use of undeclared identifier '__builtin_ia32_vpconflictdi_512'
    >
    >   return (__m512i) __builtin_ia32_vpconflictdi_512 ((__v8di) __A);
    >
    >                    ^
    >
    > <some directory>/lib/clang/stable/include/avx512cdintrin.h:59:20: error: use of undeclared identifier '__builtin_ia32_vpconflictsi_512'
    >
    >   return (__m512i) __builtin_ia32_vpconflictsi_512 ((__v16si) __A);
    >
    >                    ^
    >
    > Any suggestions on what might be messed up in the build/installation?
    >
    > (In other contexts I would delete all build directories and restart but in this workflow I know everything started from clean checkouts)
    >
    >
    >
    > Thanks for any help
    >
    > david
    >
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