[llvm-dev] Compiling GNU C Library (glibc) with llvm

[David Blaikie via llvm-dev]

As luck would have it, asm goto was recently implemented in LLVM:
http://llvm.org/viewvc/llvm-project?view=revision&revision=353563 (not sure
if it's fully baked yet, that might just be the LLVM part & maybe there's
some Clang plumbing still required)

On Sat, Feb 9, 2019 at 7:32 PM blubee blubeeme via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> The main reason is that GLIBC uses non-standards compliant extensions for
> programmers convenience and LLVM want's to stick to the standards as much
> as possible.
>
> LLVM also uses some non-standard extensions. For example asm goto; the
> last time I checked Clang did not support ASM GOTO and so later linux
> kernels cannot be compiled.
>
> The general answer comes down to standards compliance; that's my
> understanding.
>
> Best,
> Owen
>
> On Sun, Feb 10, 2019 at 11:23 AM Md Salman Ahmed via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hi All,
>>
>> I was trying to build GNU C Library (glibc implementation) using the
>> clang compiler in a x86_64 Linux system. However, whenever I try to set the
>> clang compiler as the compiler in the configure script of glibc, I am
>> getting the following error.
>>
>> checking if clang is sufficient to build libc... no
>>
>>
>> I did a quick research to see why does clang compiler is not sufficient
>> to build the glibc implementation and found that the glibc implementation
>> may have some target specific features that GCC only can support. But I am
>> not getting what are the exact reasons behind this insufficiency.
>>
>> Can anybody please point me what are the exact reason behind this
>> insufficiency. Some examples would also help. Any kind of help would be
>> greatly appreciated. Thank you!
>> _______________________________________________
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>> llvm-dev at lists.llvm.org
>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
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