[Mesa-dev] Problem with RX 480 on Alien: Isolation and Dota 2

[Marek Olšák]

On Thu, Sep 15, 2016 at 5:04 AM, Romain Failliot
<romain.failliot at foolstep.com> wrote:
> 2016-09-13 13:53 GMT-04:00 Marek Olšák <maraeo at gmail.com>:
>> LLVM 32-bit:
>>
>> mkdir -p build32
>> cd build32
>> cmake .. -G Ninja -DCMAKE_INSTALL_PREFIX=/usr/llvm/i386-linux-gnu
>> -DLLVM_TARGETS_TO_BUILD="X86;AMDGPU" -DLLVM_ENABLE_ASSERTIONS=ON
>>                   -DCMAKE_BUILD_TYPE=RelWithDebInfo
>> -DLLVM_BUILD_LLVM_DYLIB=ON -DLLVM_LINK_LLVM_DYLIB=ON \
>>                   -DCMAKE_C_FLAGS_RELWITHDEBINFO="-O2 -g -DNDEBUG
>> -fno-omit-frame-pointer" \
>>                   -DCMAKE_CXX_FLAGS_RELWITHDEBINFO="-O2 -g -DNDEBUG
>> -fno-omit-frame-pointer" \
>>                   -DLLVM_BUILD_32_BITS=ON
>
> I have a problem with the 32-bit compilation of llvm.
>
> I get this error:
>
> -- Target triple: x86_64-unknown-linux-gnu
> -- Native target architecture is X86
> -- Threads enabled.
> -- Doxygen disabled.
> -- Sphinx disabled.
> -- Go bindings disabled.
> -- Could NOT find OCaml (missing:  OCAMLFIND OCAML_VERSION OCAML_STDLIB_PATH)
> -- Could NOT find OCaml (missing:  OCAMLFIND OCAML_VERSION OCAML_STDLIB_PATH)
> -- OCaml bindings disabled.
> -- Building with -fPIC
> -- Building 32 bits executables and libraries.
> CMake Error at cmake/modules/HandleLLVMOptions.cmake:469 (message):
>   LLVM requires C++11 support but the '-std=c++11' flag isn't supported.
> Call Stack (most recent call first):
>   CMakeLists.txt:473 (include)
>
>
> -- Configuring incomplete, errors occurred!
>
> I don't know why my LLVM doesn't handle C++11... Any idea?

Update your gcc I guess? Sorry, I don't know much about LLVM build
requirements. It works with gcc 5.4.0.

Marek