[LLVMdev] size_t?
Eric Mader
emader at gmx.us
Tue Sep 30 18:50:23 PDT 2014
But crtdefs.h says:
#ifdef _WIN64
typedef unsigned __int64 size_t;
#else
typedef _W64 unsigned int size_t;
#endif
Which conflicts with the built-in definition, that seems to be
equivalent to:
typedef unsigned int size_t;
What determines the built-in type of size_t? Is there some setting or
variable I can define to change it?
Regards,
Eric
On 9/30/14, 3:21 PM, David Majnemer wrote:
> I believe that we provide a definition of size_t inside the compiler
> itself when clang is in MSVC compatibility mode.
>
> On Tue, Sep 30, 2014 at 5:51 PM, Eric Mader <emader at gmx.us
> <mailto:emader at gmx.us>> wrote:
>
> 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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