llvm dev - Jul 2015 - [LLVMdev] Compiling LibC++ with LLVM on ARM

Hi Marshall,

I'm trying to compile the whole thing in one go by adding libcxx and
libcxxabi into llvm/src/projects.

The first stage obviously has to use the system compiler, which is GCC
4.8.2, but I'm getting an error on ARM:

Unwind-EHABI.cpp:1000:47: error: expected unqualified-id before string constant
 _LIBUNWIND_EXPORT extern "C" _Unwind_Reason_Code

with the caret pointing at _Unwind_Reason_Code.

With Clang, it passes, as it's what I'm using on the libcxx ARM
buildbot.

I tried using -std=c++11 on CXXFLAGS, but didn't seem to have made a
difference.

Ideas?

cheers,
--renato

PS: I have other problems with AArch64, but let's deal with this one first.
:)

Hi Renato,

On 24 July 2015 at 04:35, Renato Golin <renato.golin at linaro.org>
wrote:
> Unwind-EHABI.cpp:1000:47: error: expected unqualified-id before string
constant
>  _LIBUNWIND_EXPORT extern "C" _Unwind_Reason_Code
GCC seems to be stricter than Clang about the ordering of
__attribute__ (from _LIBUNWIND_EXPORT) and 'extern "C"'. You
can play
around with:

 __attribute__((visibility("default"))) extern "C" void
func() {}

Cheers.

Tim.

On 24 July 2015 at 15:00, Tim Northover <t.p.northover at gmail.com>
wrote:
> GCC seems to be stricter than Clang about the ordering of
> __attribute__ (from _LIBUNWIND_EXPORT) and 'extern "C"'.
Humpf, that seems to be an old thing. GCC 5.1 on my laptop cope with
that just fine. :(

thanks!
--renato

On Fri, Jul 24, 2015 at 4:35 AM, Renato Golin <renato.golin at linaro.org>
wrote:
> Hi Marshall,
>
> I'm trying to compile the whole thing in one go by adding libcxx and
> libcxxabi into llvm/src/projects.
>
>
Sorry I missed this.
Glad you got help.

-- Marshall
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