[llvm-dev] [RFR] JDK-8156980: Hotspot build doesn't have -std=gnu++98 gcc option

[Martin Buchholz via llvm-dev]

it's difficult to use llvm tools like sanitizers on openjdk sources,
because of the "cheating" - relying on undefined behavior, and the JIT.

On Wed, Sep 5, 2018 at 6:09 PM, Leslie Zhai <zhaixiang at loongson.cn> wrote:

> Hi Martin,
>
> Thanks for your response!
>
> I haven't tested compiling OpenJDK 12-dev with LLVM toolchain, perhaps the
> issue had been fixed already,  because clang treat invalid argument
> '-std=gnu++98' not allowed with 'C' as error.  It is better only apply
> EXTRA_CFLAGS to C without EXTRA_CXXFLAGS.
>
> Furthermore, I just have interest, did you use clang analyzer, sanitizer
> and libfuzzer towards hotspot and jdk native library? Thanks!
>
>
> 在 2018年09月06日 02:10, Martin Buchholz 写道:
>
>> We seem to have some confusion about flags for C vs. flags for C++.  Most
>> flags for most toolchains apply to both C and C++, so it's understandable
>> that we want to unify them.  But some flags, notably -std, are
>> language-specific.  We have both EXTRA_CFLAGS and EXTRA_CXXFLAGS, so we
>> should expect EXTRA_CFLAGS to only apply to C.
>>
>
> --
> Regards,
> Leslie Zhai
>
>
>
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