[LLVMdev] Support for Windows Phone 8.1

[Damanjit Singh]

Thanks a lot Saleem,

The issue is fixed and a simple app works fine now.

-Daman

On 08/06/14 12:57 pm, "Nick Lewycky" <nicholas at mxc.ca> wrote:

>Damanjit Singh wrote:
>> Thanks Saleem, Nick.
>>
>> I will try with the latest code and share the results.
>>
>> Though, just curious if I need to really use clang to generate the
>> object file and the current steps won't work? I ask because using .c
>> file was only an illustration. For my project the IR is not generated
>> from .c files or clang.
>
>You don't need to use clang. When you use clang you have to tell it what
>target it's targeting.
>
>If you're starting with IR, try "llc -filetype=obj foo.bc -o foo.obj
>-mtriple=..." to produce a .o file directly. I'm not experienced with it
>myself but I've heard that MSVC will produce assembly that it can't
>parse, so it's probably a good idea to leave assembly out of the
>equation when targeting Windows.
>
>Nick
>
>> On 08-Jun-2014, at 11:00 am, "Saleem Abdulrasool" <compnerd at compnerd.org
>> <mailto:compnerd at compnerd.org>> wrote:
>>
>>> On Sat, Jun 7, 2014 at 4:49 PM, Nick Lewycky <nicholas at mxc.ca
>>> <mailto:nicholas at mxc.ca>> wrote:
>>>
>>>     Damanjit Singh wrote:
>>>
>>>         Hi guys,
>>>
>>>         Would really appreciate any help here.
>>>
>>>         Thanks,
>>>         Daman
>>>
>>>         From: Damanjit Singh <dsingh at adobe.com
>>>         <mailto:dsingh at adobe.com> <mailto:dsingh at adobe.com
>>>         <mailto:dsingh at adobe.com>>>
>>>
>>>         Date: Friday, 6 June 2014 12:57 pm
>>>         To: "llvmdev at cs.uiuc.edu <mailto:llvmdev at cs.uiuc.edu>
>>>         <mailto:llvmdev at cs.uiuc.edu <mailto:llvmdev at cs.uiuc.edu>>"
>>>         <llvmdev at cs.uiuc.edu <mailto:llvmdev at cs.uiuc.edu>
>>>         <mailto:llvmdev at cs.uiuc.edu <mailto:llvmdev at cs.uiuc.edu>>>
>>>
>>>         Subject: Support for Windows Phone 8.1
>>>
>>>         Hi LLVMdev,
>>>
>>>         Does the latest trunk code support Windows Phone 8.1 target ?
>>>
>>>
>>>     I don't know this, but ...
>>>
>>>         I was trying out a simple program, but Visual Studio 2013¹s
>>>linker
>>>         failed for me with this error - app.obj : error LNK2008: Fixup
>>>         target is
>>>         not aligned Œadd3'
>>>
>>>         This is what I tried -
>>>
>>>         * Download latest LLVM sources (as on 4th June) and build them
>>>         on my
>>>         MAC 10.9 machine.
>>>         * Wrote a simple a.c, with add3 function-
>>>
>>>
>>>         int add3(int i, int j)
>>>         {
>>>         int k = i+j;
>>>         return k;
>>>         }
>>>
>>>         * Create LLVM IR using Xcode 5.1¹s clang ( *clang ­S -O0
>>>         -emit­llvm a.c* )
>>>         * Create obj file ­ using llc - *. /i686-apple-darwin11-llc
>>>         -filetype=obj -mtriple=thumbv7-windows-msvc -O0 a.s *
>>>
>>>
>>>     ... in general this doesn't work. The transformation from C to
>>>     LLVM IR needs to know the target triple. Try "clang
>>>     --target=thumbv7-windows-msvc a.c -c -o a.obj"? Since clang has a
>>>     built-in assembler, you should get a valid COFF file out, to the
>>>     extent that clang and llvm support this target.
>>>
>>>     If that doesn't work, I may suggest it's unsupported.
>>>
>>>
>>> As Nick mentioned, please generate the object file directly from
>>> clang. You can use armv7-windows or thumbv7-windows (clang will
>>> translate armv7-windows to thumbv7-windows implicitly). I just fixed a
>>> bug that should allow you to link the object files with link.
>>>
>>>     Nick
>>>
>>>         * Now on a Windows 8.1 Desktop machine, link this object file
>>>         into
>>>
>>>         sample (new DirectX app, windows phone) Visual Studio 2013
>>>         project.
>>>         * Declare and Call add3 in the sample windows project.
>>>         * I then get a linker error on building the solution.
>>>
>>>         *1>app.obj : error LNK2008: Fixup target is not aligned 'add3'*
>>>         *1>LINK : fatal error LNK1165: link failed because of fixup
>>>         errors*
>>>         *========== Rebuild All: 0 succeeded, 1 failed, 0 skipped
>>>         ==========*
>>>
>>>
>>>
>>>         Could someone please confirm about the state of support for
>>>         Windows
>>>         Phone 8.1 ? Or am I missing something here?
>>>
>>>         Thanks,
>>>         Daman
>>>
>>>
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>>>
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>>>
>>>
>>>
>>>
>>> --
>>> Saleem Abdulrasool
>>> compnerd (at) compnerd (dot) org
>