[cfe-dev] VS2013 <atomic> not parsing

[Reid Kleckner via cfe-dev]

We need to come up with a solution that allows syntax-only tools that don't
link in any LLVM backends to semantically analyze files with MS inline asm.

For a semantic tool, encountering opaque inline asm is probably only worthy
of a warning, since skipping inline asm semantic analysis should only lead
to a few false positives. In this case, we're in a system header and they
will probably be suppressed. For a tool that generates IR, unparseable
inline asm should definitely be an error.

I'm not exactly sure how to rig up the severity level modification, though.

On Thu, Aug 18, 2016 at 5:36 PM, Daniel Dilts via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> I have a custom tool that is built using clang 3.8.0.  When I #include
> <atomic> the tool fails and gives this error message:
>
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual Studio
> 12.0\VC\include\atomic:19:
> 1>C:\Program Files (x86)\Microsoft Visual Studio
> 12.0\VC\include\xatomic.h(98,2): error : MS-style inline assembly is not
> available: Unable to find target for this triple (no targets are registered)
> 1>          __asm
> 1>          ^
> 1>C:\Program Files (x86)\Microsoft Visual Studio
> 12.0\VC\include\xatomic.h(117,2): error : MS-style inline assembly is not
> available: Unable to find target for this triple (no targets are registered)
> 1>          __asm
> 1>          ^
> 1>C:\Program Files (x86)\Microsoft Visual Studio
> 12.0\VC\include\xatomic.h(140,2): error : MS-style inline assembly is not
> available: Unable to find target for this triple (no targets are registered)
> 1>          __asm
> 1>          ^
> 1>C:\Program Files (x86)\Microsoft Visual Studio
> 12.0\VC\include\xatomic.h(163,2): error : MS-style inline assembly is not
> available: Unable to find target for this triple (no targets are registered)
> 1>          __asm
> 1>          ^
> 1>C:\Program Files (x86)\Microsoft Visual Studio
> 12.0\VC\include\xatomic.h(186,2): error : MS-style inline assembly is not
> available: Unable to find target for this triple (no targets are registered)
> 1>          __asm
> 1>          ^
> 1>  5 errors generated.
>
>
>
>
> When I run clang-cl against the same file it compiles without a
> complaint.  What would I need to do to get this to work?
>
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