[llvm-dev] error in building llvm with default options

Fri Jan 3 15:50:08 PST 2020

I looked back at the linked thread from November, and the two things that
jump out are:
- Come up with some conditions under which LLVM_USE_SPLIT_DWARF can be ON
by default without user intervention. Could be a compiler version check or
an autoconf style feature test.
- Try to add -fuse-ld=lld and -fuse-ld=gold to linker flags, if either
works, do that.

There was a discussion about LLVM_OPTIMIZED_TABLEGEN defaulting to on. You
could probably get consensus for that change, but I don't like it. :)

On Thu, Jan 2, 2020 at 11:22 PM Kókai Péter <kokaipeter at gmail.com> wrote:

> Hello,
>
> I am willing to work on changing the defaults reducing memory for build.
> Do you have a link for discussion about the agreement?
> I am just looking for pointers - as I am pretty much inexperienced with
> llvm compilation - that could be checked out for finding better defaults.
> Regardless I am going to check out things mentioned in this thread.
>
> --
> Kokan
>
>
> On Thu, 2 Jan 2020, 10:12 pm Reid Kleckner via llvm-dev, <
> llvm-dev at lists.llvm.org> wrote:
>
>> The last time this came up, we agreed something should be done to fix the
>> defaults, but nobody picked it up and ran with it. I think there was
>> consensus, it just needs legwork now.
>>
>> On Thu, Jan 2, 2020 at 11:58 AM Aaron Smith via llvm-dev <
>> llvm-dev at lists.llvm.org> wrote:
>>
>>> There was a recent thread on reducing memory:
>>> http://lists.llvm.org/pipermail/llvm-dev/2019-June/thread.html#133215
>>>
>>> On Thu, Jan 2, 2020 at 11:24 AM David Blaikie via llvm-dev
>>> <llvm-dev at lists.llvm.org> wrote:
>>> >
>>> > Various options for reducing memory usage when building LLVM:
>>> > * Don't use bfd-ld, at least use gold, probably use lld if you have it
>>> available
>>> > * With Ninja and/or CMake there's some way to specify the maximum
>>> number of concurrent linkactions - lower this to fit in your available
>>> memory
>>> > * If you're building with debug info: Use Split DWARF
>>> >
>>> >
>>> > On Thu, Jan 2, 2020 at 5:21 AM Kókai Péter via llvm-dev <
>>> llvm-dev at lists.llvm.org> wrote:
>>> >>
>>> >> Hello,
>>> >>
>>> >> I cannot tell you if this is due to ram, but I had ram issue with 32
>>> >> GB + 16 core when build with default options (clang was around 1 GB
>>> >> binary), you could try to enable shared libraries(BUILD_SHARED_LIBS).
>>> >> In that case I did not run into out of memory kind of issues.
>>> >>
>>> >> --
>>> >> Kokan
>>> >>
>>> >> On Thu, 2 Jan 2020 at 14:14, Priyanka Panigrahi via llvm-dev
>>> >> <llvm-dev at lists.llvm.org> wrote:
>>> >> >
>>> >> > hello,
>>> >> >
>>> >> > I am trying to build LLVM with default options. I am getting the
>>> following error message after make.
>>> >> >
>>> >> > [100%] Building C object
>>> tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/metadata.c.o
>>> >> > [100%] Building C object
>>> tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/module.c.o
>>> >> > [100%] Building C object
>>> tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/object.c.o
>>> >> > [100%] Building C object
>>> tools/llvm-c-test/CMakeFiles/llvm-c-test.dir/targets.c.o
>>> >> > [100%] Linking CXX executable ../../bin/llvm-c-test
>>> >> > clang: error: unable to execute command: Killed
>>> >> > clang: error: linker command failed due to signal (use -v to see
>>> invocation)
>>> >> > tools/llvm-lto/CMakeFiles/llvm-lto.dir/build.make:211: recipe for
>>> target 'bin/llvm-lto' failed
>>> >> > make[2]: *** [bin/llvm-lto] Error 254
>>> >> > CMakeFiles/Makefile2:21155: recipe for target
>>> 'tools/llvm-lto/CMakeFiles/llvm-lto.dir/all' failed
>>> >> > make[1]: *** [tools/llvm-lto/CMakeFiles/llvm-lto.dir/all] Error 2
>>> >> > [100%] Built target llvm-lipo
>>> >> > clang: error: unable to execute command: Killed
>>> >> > clang: error: linker command failed due to signal (use -v to see
>>> invocation)
>>> >> > tools/llc/CMakeFiles/llc.dir/build.make:212: recipe for target
>>> 'bin/llc' failed
>>> >> > make[2]: *** [bin/llc] Error 254
>>> >> > CMakeFiles/Makefile2:22024: recipe for target
>>> 'tools/llc/CMakeFiles/llc.dir/all' failed
>>> >> > make[1]: *** [tools/llc/CMakeFiles/llc.dir/all] Error 2
>>> >> > clang: error: unable to execute command: Killed
>>> >> > clang: error: linker command failed due to signal (use -v to see
>>> invocation)
>>> >> > tools/dsymutil/CMakeFiles/dsymutil.dir/build.make:476: recipe for
>>> target 'bin/dsymutil' failed
>>> >> > make[2]: *** [bin/dsymutil] Error 254
>>> >> > CMakeFiles/Makefile2:21803: recipe for target
>>> 'tools/dsymutil/CMakeFiles/dsymutil.dir/all' failed
>>> >> > make[1]: *** [tools/dsymutil/CMakeFiles/dsymutil.dir/all] Error 2
>>> >> > clang: error: unable to execute command: Killed
>>> >> > clang: error: linker command failed due to signal (use -v to see
>>> invocation)
>>> >> > tools/llvm-dwp/CMakeFiles/llvm-dwp.dir/build.make:230: recipe for
>>> target 'bin/llvm-dwp' failed
>>> >> > make[2]: *** [bin/llvm-dwp] Error 254
>>> >> > CMakeFiles/Makefile2:24606: recipe for target
>>> 'tools/llvm-dwp/CMakeFiles/llvm-dwp.dir/all' failed
>>> >> > make[1]: *** [tools/llvm-dwp/CMakeFiles/llvm-dwp.dir/all] Error 2
>>> >> > clang: error: unable to execute command: Killed
>>> >> > clang: error: linker command failed due to signal (use -v to see
>>> invocation)
>>> >> > tools/llvm-lto2/CMakeFiles/llvm-lto2.dir/build.make:210: recipe for
>>> target 'bin/llvm-lto2' failed
>>> >> > make[2]: *** [bin/llvm-lto2] Error 254
>>> >> > CMakeFiles/Makefile2:26436: recipe for target
>>> 'tools/llvm-lto2/CMakeFiles/llvm-lto2.dir/all' failed
>>> >> > make[1]: *** [tools/llvm-lto2/CMakeFiles/llvm-lto2.dir/all] Error 2
>>> >> > [100%] Built target lli
>>> >> > clang: error: unable to execute command: Killed
>>> >> > clang: error: linker command failed due to signal (use -v to see
>>> invocation)
>>> >> >
>>> tools/llvm-isel-fuzzer/CMakeFiles/llvm-isel-fuzzer.dir/build.make:238:
>>> recipe for target 'bin/llvm-isel-fuzzer' failed
>>> >> > make[2]: *** [bin/llvm-isel-fuzzer] Error 254
>>> >> > CMakeFiles/Makefile2:25580: recipe for target
>>> 'tools/llvm-isel-fuzzer/CMakeFiles/llvm-isel-fuzzer.dir/all' failed
>>> >> > make[1]: ***
>>> [tools/llvm-isel-fuzzer/CMakeFiles/llvm-isel-fuzzer.dir/all] Error 2
>>> >> > [100%] Built target llvm-opt-fuzzer
>>> >> > [100%] Built target llvm-c-test
>>> >> > [100%] Built target LTO
>>> >> > Makefile:151: recipe for target 'all' failed
>>> >> > make: *** [all] Error 2
>>> >> >
>>> >> > Is it because of RAM? I am trying to build in a 16GB RAM, 12 core
>>> processor.
>>> >> > Can anyone please help what am I missing?
>>> >> >
>>> >> > Thank you for your time.
>>> >> >
>>> >> > Priyanka
>>> >> > _______________________________________________
>>> >> > LLVM Developers mailing list
>>> >> > llvm-dev at lists.llvm.org
>>> >> > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>> >> _______________________________________________
>>> >> LLVM Developers mailing list
>>> >> llvm-dev at lists.llvm.org
>>> >> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>> >
>>> > _______________________________________________
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>>> > llvm-dev at lists.llvm.org
>>> > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>> _______________________________________________
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