[cfe-dev] clang compiling complex reports err

Douglas Gregor dgregor at apple.com
Tue Jan 4 17:21:53 PST 2011

On Jan 4, 2011, at 5:08 PM, John McCall wrote:

> On Jan 4, 2011, at 1:44 AM, Francois Pichet wrote:
>> 2011/1/4 <way_lzl at sina.com>
>> No, _Complex is used in MSVC's math.h. 
>> line 135: _CRTIMP double  __cdecl _cabs(__in struct _complex _Complex);
>> Ok that's in Visual Studio 2005. It was changed in MSVC 2008 to not use _Complex as parameter name.
>> Then if I use math.h with Clang on windows, what should I do?
>> Either you submit a patch to fix it yourself or you can submit a PR and wait for someone else to fix it.
>> Otherwise use VS 2008.
> _Complex should really be a C99-only keyword.  If we did that, then you could compile as C89 without a problem.

GCC accepts _Complex as a keyword in C++ mode. We could turn that off in Microsoft C++ mode, of course.

	- Doug

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