[LLVMdev] size_t?

Tue Sep 30 17:51:56 PDT 2014

I did some more investigation of the size_t size error. I misunderstood 
what was happening. It turns out that size_t is already defined before 
my prefix header is included. I added the following static_asserts to 
the font of the header:

static_assert(sizeof(size_t) != 4, "sizeof(size_t) == 4");
static_assert(sizeof(size_t) != 8, "sizeof(size_t) == 8");

The first static_assert fires:

1>Build started 9/30/2014 2:29:54 PM.
1>clang-cl.exe : warning : argument unused during compilation: '/Gm-'
1>clang-cl.exe : warning : argument unused during compilation: '/GS'
1>clang-cl.exe : warning : argument unused during compilation: '/fp:precise'
1>clang-cl.exe : warning : argument unused during compilation: 
'/FdDebug\x64\vc120.pdb'
1>clang-cl.exe : warning : argument unused during compilation: '/Gd'
1>  In file included from <built-in>:187:
1>  In file included from <command line>:19:
1>[elided header file name](9,1): error : static_assert failed 
"sizeof(size_t) == 4"
1>  static_assert(sizeof(size_t) != 4, "sizeof(size_t) == 4");
1>  ^             ~~~~~~~~~~~~~~~~~~~

Later on, I get an error saying that crtdefs.h is trying to redefine 
size_t from an unsigned int to an unsigned long long...

Perhaps one of my preprocessor defines is causing these errors:

WIN32
_DEBUG
_WINDOWS
_USRDLL
_SCL_SECURE_NO_WARNINGS
_CRT_SECURE_NO_WARNINGS
_WIN64
_x86_64_ = 1

(I added the "SECURE_NO_WARNINGS" defines when I ported an earlier 
version of this code to VS 2005; don't remember why any more...)
(There are a couple of other defines that are specific to the DLL I'm 
trying to build)

Regards,
Eric Mader

On 9/30/14, 1:01 PM, Eric Mader wrote:
> Hi Reid,
>
> I copied the x64 toolsets by hand; they got installed to C:\Program 
> Files (x86)\LLVM\tools\msbuild\x64; they just didn't get moved 
> correctly by install.bat.
>
> I just verified that the LLVM-vs2013 toolset.props is correct.
>
> If it is a bitness problem, perhaps I'm failing to define something 
> correctly?
>
> Regards,
> Eric
>
> On 9/30/14, 11:29 AM, Reid Kleckner wrote:
>> This looks like some kind of bitness conflict. If you are building 
>> for win64, are you sure clang is getting the -m64 argument?
>>
>> I recall that you copied the win32 platform toolset xml files over by 
>> hand, and I don't think they will have the correct flags. If you see 
>> this line in the x64 toolset.props file, replace -m32 with -m64 and 
>> try again:
>> <AdditionalOptions>-m32 -fmsc-version=1700 
>> %(AdditionalOptions)</AdditionalOptions>
>>
>> In the meantime, I think Hans is trying to fix the installation of 
>> those xml files and hopefully that will fix issues for other users 
>> going forwards.
>>
>> On Tue, Sep 30, 2014 at 1:55 PM, Eric Mader <emader at gmx.us 
>> <mailto:emader at gmx.us>> wrote:
>>
>>     I'm getting compile errors because size_t is getting redefined.
>>     My "forced include file" starts with:
>>
>>     #if BUILDING_FOR_WINDOWS
>>     #define NOMINMAX
>>
>>     /* deal with the fact that windef.h also defines BOOL */
>>     #define BOOL WINBOOL
>>
>>     #include <windows.h>
>>     #include <intrin.h>
>>
>>     #undef BOOL
>>     #endif
>>
>>     Looking at the preprocessor expansion of a typical .cpp file, I
>>     see that crtdefs.h defines size_t like this:
>>
>>     typedef unisgned __int64 size_t;
>>
>>     Later on, <LLVM>\lib\clang\3.6.0\includes\stddef.h defines it as:
>>
>>     typedef unsigned int size_t;
>>
>>     Is there some other magic I need to do to get these to work?
>>
>>     I'm also seeing a bunch of errors like this having to do with
>>     intrinsics:
>>
>>     1>  In file included from C:\Program Files (x86)\Microsoft Visual
>>     Studio 12.0\VC\include\algorithm:6:
>>     1>  In file included from C:\Program Files (x86)\Microsoft Visual
>>     Studio 12.0\VC\include\xmemory:6:
>>     1>  In file included from C:\Program Files (x86)\Microsoft Visual
>>     Studio 12.0\VC\include\xmemory0:909:
>>     1>  In file included from C:\Program Files
>>     (x86)\LLVM\msbuild-bin\..\lib\clang\3.6.0\include\intrin.h:34:
>>     1>  In file included from C:\Program Files
>>     (x86)\LLVM\msbuild-bin\..\lib\clang\3.6.0\include\x86intrin.h:29:
>>     1>  In file included from C:\Program Files
>>     (x86)\LLVM\msbuild-bin\..\lib\clang\3.6.0\include\immintrin.h:28:
>>     1>C:\Program Files
>>     (x86)\LLVM\msbuild-bin\..\lib\clang\3.6.0\include\mmintrin.h(52,40):
>>     error : cannot initialize a parameter of type
>>     '__attribute__((__vector_size__(2 * sizeof(int)))) int' (vector
>>     of 2 'int' values) with an rvalue of type '__v2si' (aka 'int')
>>     1>      return __builtin_ia32_vec_ext_v2si((__v2si)__m, 0);
>>     1> ^~~~~~~~~~~
>>
>>     I suspect that these might be caused by the same thing as the
>>     size_t problem...
>>
>>     Regards,
>>     Eric Mader
>>
>>
>>
>>
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>>
>
>
>
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